{"id":4393,"date":"2026-06-11T01:07:38","date_gmt":"2026-06-11T01:07:38","guid":{"rendered":"https:\/\/beiyutitanium.com\/titanium-bar-grade-selection-guide\/"},"modified":"2026-08-18T04:38:23","modified_gmt":"2026-08-18T04:38:23","slug":"titanium-bar-grade-selection-guide","status":"publish","type":"post","link":"https:\/\/beiyutitanium.com\/it\/titanium-bar-grade-selection-guide\/","title":{"rendered":"Scelta tra barre di titanio Grade 2 e Grade 5 per l'approvvigionamento"},"content":{"rendered":"<style>\n      .by-c118-bar-grade {\n        --c118-blue: #087eb5;\n        --c118-navy: #0a3268;\n        --c118-ink: #24364d;\n        --c118-muted: #607087;\n        --c118-line: #dce4ed;\n        --c118-soft: #f3f7fa;\n        color: var(--c118-ink);\n        font-size: 16px;\n        line-height: 1.72;\n      }\n      .by-c118-bar-grade,\n      .by-c118-bar-grade * { box-sizing: border-box; }\n      .by-c118-bar-grade a { color: var(--c118-blue); }\n      .by-c118-bar-grade .c118-main-column p a,\n      .by-c118-bar-grade .c118-main-column li a,\n      .by-c118-bar-grade .c118-lead-intro a {\n        text-decoration: underline;\n        text-underline-offset: 3px;\n      }\n      .by-c118-bar-grade .c118-lead-intro {\n        color: var(--c118-ink);\n        font-size: 18px;\n        margin: 0;\n        padding: 0 20px 28px;\n      }\n      .by-c118-bar-grade .c118-answer-band {\n        background: var(--c118-navy);\n        color: #fff;\n        padding: 38px 20px;\n      }\n      .by-c118-bar-grade .c118-answer-inner {\n        display: grid;\n        gap: 26px;\n        grid-template-columns: 1fr 1fr;\n        margin: 0 auto;\n        max-width: 1130px;\n      }\n      .by-c118-bar-grade .c118-answer-inner > h2 {\n        color: #fff;\n        font-size: 24px;\n        line-height: 1.25;\n        margin: 0;\n        grid-column: 1 \/ -1;\n      }\n      .by-c118-bar-grade .c118-answer-choice {\n        border-left: 1px solid rgba(255, 255, 255, .28);\n        padding-left: 26px;\n      }\n      .by-c118-bar-grade .c118-answer-choice h3 {\n        color: #b9e7ff;\n        font-size: 18px;\n        margin: 0 0 8px;\n      }\n      .by-c118-bar-grade .c118-answer-choice p { margin: 0; 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}\n        .by-c118-bar-grade .c118-answer-band { padding: 34px 14px; }\n        .by-c118-bar-grade .c118-answer-inner {\n          gap: 24px;\n          grid-template-columns: 1fr;\n        }\n        .by-c118-bar-grade .c118-answer-inner > h2 { grid-column: auto; }\n        .by-c118-bar-grade .c118-answer-choice {\n          border-left: 0;\n          border-top: 1px solid rgba(255, 255, 255, .28);\n          padding: 18px 0 0;\n        }\n        .by-c118-bar-grade .c118-content-shell { padding: 48px 14px 64px; }\n        .by-c118-bar-grade .c118-main-column h2 {\n          font-size: 27px;\n          margin-top: 48px;\n        }\n        .by-c118-bar-grade .c118-comparison {\n          display: table;\n        }\n        .by-c118-bar-grade .c118-comparison thead { display: table-header-group; }\n        .by-c118-bar-grade .c118-comparison tbody { display: table-row-group; }\n        .by-c118-bar-grade .c118-comparison tr { display: table-row; }\n        .by-c118-bar-grade .c118-comparison th,\n        .by-c118-bar-grade .c118-comparison td { display: table-cell; }\n        .by-c118-bar-grade .c118-product-links,\n        .by-c118-bar-grade .c118-sidebar { grid-template-columns: 1fr; }\n        .by-c118-bar-grade .c118-rfq-list { columns: 1; }\n      }\n      @media (prefers-reduced-motion: reduce) {\n        .by-c118-bar-grade .c118-product-link { transition: none; }\n      }\n    <\/style>\n<div class=\"by-c118-bar-grade\">\n<p class=\"c118-lead-intro\">La barra Grade 2 \u00e8 il punto di partenza abituale quando la scelta dipende da impiego in ambiente corrosivo, formatura o saldatura. La barra Grade 5 \u00e8 l'opzione a maggiore resistenza per parti lavorate soggette a carico. La scelta dipende dal disegno, dall'ambiente di impiego, dallo stato di fornitura e dalla norma applicabile, quindi fermo una richiesta di offerta che indica solo ASTM B348 e chiedo la voce mancante.<\/p>\n<section class=\"c118-answer-band\" aria-labelledby=\"direct-answer-title\">\n<div class=\"c118-answer-inner\">\n<h2 id=\"direct-answer-title\">Barra Grade 2 o Grade 5?<\/h2>\n<div class=\"c118-answer-choice\">\n<h3>Partire da Grade 2<\/h3>\n<p>Utilizzare il grado commercialmente puro quando il progetto approvato \u00e8 guidato da impiego in ambiente corrosivo, formatura o saldatura. Indicare fluido, temperatura e processo di fabbricazione.<\/p>\n<\/p><\/div>\n<div class=\"c118-answer-choice\">\n<h3>Partire da Grade 5<\/h3>\n<p>Utilizzare Ti-6Al-4V quando il disegno richiede la lega a maggiore resistenza per una parte lavorata soggetta a carico. Indicare lo stato della barra e la norma citata nel disegno.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n<section class=\"c118-content-shell\">\n<article class=\"c118-main-column\">\n<p class=\"c118-eyebrow\">Note sulle barre di titanio<\/p>\n<h2 id=\"comparison\">Cosa cambia nella voce d'ordine<\/h2>\n<p>Grade 2 \u00e8 titanio commercialmente puro. Grade 5 \u00e8 Ti-6Al-4V con criteri di accettazione meccanica diversi. ASTM B348 copre barre e billette, ma non sceglie la lega. Inserire grado, dimensioni e stato nella descrizione d'acquisto. Se un disegno approvato cita AMS 4928 per la barra Grade 5, utilizzarla. Altrimenti escludo AMS 4928 dall'offerta. Consultare la <a href=\"https:\/\/beiyutitanium.com\/it\/astm-b348-titanium-bar-billet-guide\/\">guida alle barre e billette ASTM B348<\/a> per la specifica e il <a href=\"https:\/\/beiyutitanium.com\/it\/grade-2-vs-grade-5-titanium\/\">confronto tra Grade 2 e Grade 5 a livello di materiale<\/a> per altre forme di prodotto.<\/p>\n<div class=\"c118-comparison-wrap\" role=\"region\" aria-label=\"Confronto tra barre di titanio Grade 2 e Grade 5\" tabindex=\"0\">\n<table class=\"c118-comparison\">\n<thead>\n<tr>\n<th scope=\"col\">Punto decisionale<\/th>\n<th scope=\"col\">barra Grade 2<\/th>\n<th scope=\"col\">barra Grade 5<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th scope=\"row\">Materiale<\/th>\n<td>Titanio commercialmente puro<\/td>\n<td>Lega Ti-6Al-4V<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Voce di specifica nell'ordine<\/th>\n<td>ASTM B348, pi\u00f9 il disegno approvato<\/td>\n<td>ASTM B348, oppure AMS 4928 quando il disegno la richiede<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Cosa determina solitamente la scelta<\/th>\n<td>Impiego in ambiente corrosivo, con successiva formatura o saldatura<\/td>\n<td>Un percorso dei carichi dimensionato per Ti-6Al-4V<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Accettazione della resistenza<\/th>\n<td>Utilizzare i minimi Grade 2 per lo stato ordinato e la norma applicabile<\/td>\n<td>Utilizzare i minimi Grade 5 ricotto, salvo che il disegno prescriva un altro percorso<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Selezione in base alla corrosione<\/th>\n<td>Esaminare fluido, concentrazione, temperatura e interstizi<\/td>\n<td>La maggiore resistenza meccanica non autorizza l'impiego in ambiente corrosivo<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Formatura e saldatura<\/th>\n<td>Spesso preso in esame per fabbricazione mediante formatura o saldatura<\/td>\n<td>Confermare formatura e saldatura rispetto al disegno<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Cosa pianifica l'officina meccanica<\/th>\n<td>Spalmatura del materiale e tagliente di riporto sull'utensile da taglio<\/td>\n<td>Calore che rimane vicino al taglio e aumento dell'usura dell'utensile<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Dove viene normalmente impiegata la barra<\/th>\n<td>Apparecchiature costruite, assiemi saldati, parti per impiego in ambiente corrosivo<\/td>\n<td>Alberi, grezzi per elementi di fissaggio e altre parti lavorate soggette a carico<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Verifica commerciale e della disponibilit\u00e0<\/th>\n<td>Confermare sezione, dimensioni, stato, quantit\u00e0 e documenti<\/td>\n<td>Offerta normalmente pi\u00f9 elevata; confermare gli stessi campi dell'ordine<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Campi della richiesta di offerta che cambiano<\/th>\n<td>Indicare impiego in ambiente corrosivo, fabbricazione, dimensioni e controllo<\/td>\n<td>Indicare riferimento del disegno, dimensioni, stato e specifica<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<p class=\"c118-table-note\">Ricavare i valori di accettazione dalla revisione ASTM B348 citata nell'ordine e dal disegno approvato. La nostra <a href=\"https:\/\/beiyutitanium.com\/it\/astm-b348-titanium-bar-billet-guide\/\">guida alle barre e billette ASTM B348<\/a> summarizes the standard&#8217;s structure; it is not an acceptance document, and values must not be copied between sizes, conditions or product forms.<\/p>\n<h2>Resistenza, durezza e stato della barra<\/h2>\n<p>Grade 5 presenta il livello di resistenza superiore, quindi viene utilizzato per parti lavorate portanti, anzich\u00e9 come sostituzione migliorativa generale del Grade 2. Diametro, stato di fornitura e tabella normativa applicabile determinano l'accettazione. La definizione del carico resta affidata al disegno.<\/p>\n<table data-c189=\"1\">\n<thead>\n<tr>\n<th>Grado<\/th>\n<th>Cosa afferma la guida<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Grade 2<\/td>\n<td>Usare il grado commercialmente puro quando il progetto approvato \u00e8 guidato da requisiti di corrosione, formatura o saldatura<\/td>\n<\/tr>\n<tr>\n<td>Grade 5<\/td>\n<td>Ha il livello di resistenza pi\u00f9 elevato, quindi compare su componenti lavorati portanti anzich\u00e9 come aggiornamento generale di Grade 2<\/td>\n<\/tr>\n<tr>\n<td>Grade 23<\/td>\n<td>La variante Ti-6Al-4V a interstiziali extra-bassi. Un grado distinto con propri limiti di interstiziali e requisiti di accettazione secondo la norma per barre indicata nell'ordine<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Il percorso ASTM B348 Grade 5 trattato qui utilizza criteri di accettazione nello stato ricotto. <a href=\"https:\/\/beiyutitanium.com\/it\/ams-4928-titanium-bar\/\">AMS 4928<\/a> copre anche barre, filo, pezzi forgiati e anelli Ti-6Al-4V ricotti. Un requisito STA necessita di una propria specifica di trattamento termico o di un'indicazione nel disegno approvato; non aggiungerlo a una voce di specifica per materiale ricotto. Se la durezza \u00e8 un criterio di accettazione, indicare metodo di prova e intervallo. All'officina servono anche stato di fornitura e sovrametallo di lavorazione.<\/p>\n<p>Grade 2 tende a spalmarsi sul tagliente e pu\u00f2 accumulare materiale sull'utensile. Grade 5 trattiene pi\u00f9 calore vicino al taglio e aumenta solitamente il rischio di usura dell'utensile. La <a href=\"https:\/\/beiyutitanium.com\/it\/machining-titanium-bar-stock-guide\/\">guida alla lavorazione meccanica delle barre di titanio<\/a> tratta il tema del taglio; questa pagina non prescrive velocit\u00e0, avanzamenti o durata degli utensili.<\/p>\n<h2>Le condizioni di impiego alla base di una richiesta di barre Grade 2<\/h2>\n<p>&#8220;Chemical service&#8221; still leaves the specification blank. I ask for the medium, concentration and temperature, then whether exposure is continuous or cyclic. Wet-dry duty differs from a flooded line. Crevices, deposits and dissimilar-metal contact change the review again. Load stays on the drawing. Grade 2 often comes up for corrosion-service parts that will be formed or welded, subject to the approved design. Welding needs clean titanium practice and adequate inert gas shielding. Put post-weld requirements in the drawing or qualified procedure.<\/p>\n<table data-c189=\"1\">\n<thead>\n<tr>\n<th>Cosa richiede la revisione<\/th>\n<th>Cosa afferma la guida<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Fluido, concentrazione e temperatura<\/td>\n<td>&#8220;Chemical service&#8221; still leaves the specification blank<\/td>\n<\/tr>\n<tr>\n<td>Se l'esposizione \u00e8 continua o ciclica<\/td>\n<td>Il servizio bagnato-asciutto differisce da una linea allagata<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>La barra Grade 5 e il disegno che la definisce<\/h2>\n<p>Un disegno completato che richiede Ti-6Al-4V chiude la questione della lega. Il riesame passa a revisione della norma, stato, superficie, dimensioni e controllo. Su un disegno non completato, Grade 5 utilizzato come margine generale aggiunge difficolt\u00e0 di lavorazione meccanica e formatura, mentre la questione della corrosione resta aperta. Il progettista deve accettare questo compromesso prima dell'inizio del taglio. Anche una richiesta di sostituire Grade 5 con Grade 2 torna all'ufficio tecnico perch\u00e9 il pezzo \u00e8 stato progettato per un diverso livello di resistenza.<\/p>\n<h2>Costo e disponibilit\u00e0 riguardano la voce d'ordine specifica<\/h2>\n<p>La barra Grade 5 viene normalmente quotata a un prezzo superiore al Grade 2 a parit\u00e0 di dimensioni, stato e quantit\u00e0. La differenza non \u00e8 un rapporto fisso; sezione e ambito documentale la modificano. Verificare la disponibilit\u00e0 per la stessa combinazione. Un prezzo inferiore non autorizza la sostituzione. Se l'ufficio tecnico accetta un altro grado, revisionare il disegno o la descrizione d'acquisto prima di ordinare.<\/p>\n<table data-c189=\"1\">\n<thead>\n<tr>\n<th>Punto<\/th>\n<th>Cosa afferma la guida<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Prezzo relativo<\/td>\n<td>La barra Grade 5 normalmente viene quotata sopra Grade 2 quando dimensione, condizione e quantit\u00e0 sono uguali<\/td>\n<\/tr>\n<tr>\n<td>Quanto sopra<\/td>\n<td>Il divario non \u00e8 un rapporto fisso; sezione e campo documentale lo modificano<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div class=\"c118-caution\">\n          <strong>La sostituzione torna al vaglio dell'ufficio tecnico<\/strong><\/p>\n<p>Neither grade drops into the other&#8217;s place, and the mill certificate cannot close the gap. The certificate confirms what was supplied against the order that was placed. It carries no authority over a change that never went back to the drawing.<\/p>\n<\/p><\/div>\n<h2>Se n\u00e9 Grade 2 n\u00e9 Grade 5 sono adatti<\/h2>\n<p>Due opzioni di leghe resistenti alla corrosione restano fuori da questo confronto. Quando un riesame della corrosione esclude la barra commercialmente pura per il fluido in questione, il riesame successivo pu\u00f2 passare a <a href=\"https:\/\/beiyutitanium.com\/it\/grade-7-titanium-reducing-acids\/\">Grade 7 per impiego con acidi riducenti<\/a> o <a href=\"https:\/\/beiyutitanium.com\/it\/grade-12-titanium-hot-brine-crevice-corrosion\/\">Grade 12 per salamoia calda e condizioni interstiziali<\/a>. La <a href=\"https:\/\/beiyutitanium.com\/it\/titanium-grades-comparison-guide\/\">tabella dei gradi di titanio<\/a> riporta il confronto completo tra i gradi.<\/p>\n<h2>Dove Grade 23 si discosta dal percorso Grade 5<\/h2>\n<p>Grade 23 is the extra-low-interstitial Ti-6Al-4V variant. It is a distinct grade with its own interstitial limits and acceptance requirements under the bar standard named on the order, or under the medical specification when the approved drawing calls for one. The supplier should not treat &#8220;ELI&#8221; as a casual synonym for Grade 5 or quote it against an ordinary Grade 5 line. Implant, medical or other ELI requirements should be checked against the approved drawing and the <a href=\"https:\/\/beiyutitanium.com\/it\/grade-23-titanium\/\">scheda tecnica del titanio Grade 23<\/a>.<\/p>\n<h2 id=\"rfq\">Le voci che rimando al mittente in una richiesta di offerta incompleta per barre<\/h2>\n<p>I prezzi di due gradi possono essere confrontati solo quando entrambe le voci si basano sugli stessi presupposti, quindi una richiesta incompleta torna solitamente all'acquirente prima di raggiungere lo stabilimento produttore. Cosa chiedo:<\/p>\n<ul class=\"c118-rfq-list\">\n<li>Grado e norma applicabile, con la revisione se il disegno ne cita una<\/li>\n<li>Forma e sezione della barra: diametro, distanza tra facce opposte, oppure larghezza e spessore<\/li>\n<li>Lunghezza a misura e indicazione se comprende gi\u00e0 il sovrametallo per segatura e spianatura<\/li>\n<li>Stato di fornitura e processo di finitura superficiale<\/li>\n<li>Quantit\u00e0 suddivisa per dimensione anzich\u00e9 un unico peso totale<\/li>\n<li>Applicazione e ambiente di impiego<\/li>\n<li>Sovrametallo di lavorazione quando il pezzo viene ricavato dalla barra<\/li>\n<li>Ambito del controllo e del controllo non distruttivo<\/li>\n<li>Tipo di certificato e tracciabilit\u00e0 di colata o lotto<\/li>\n<li>Requisiti di marcatura<\/li>\n<li>Destinazione, termini di consegna e imballaggio<\/li>\n<\/ul>\n<p>The words &#8220;standard tolerance&#8221; do not settle diameter, cut length, straightness, surface route or finish-machining allowance. Those lines belong in the order, and the <a href=\"https:\/\/beiyutitanium.com\/it\/titanium-bar-forms-sizes-tolerances-guide\/\">guida a forme, dimensioni e tolleranze delle barre<\/a> dedica loro uno spazio specifico senza copiare valori da un'offerta non pertinente.<\/p>\n<p>Un disegno chiarisce questi aspetti meglio di un paragrafo. La <a href=\"https:\/\/beiyutitanium.com\/it\/machining-titanium-bar-stock-guide\/\">guida alla lavorazione meccanica delle barre di titanio<\/a> tratta taglio e sovrametallo quando l'officina sta ancora scegliendo il materiale di partenza. Utilizzare la <a href=\"https:\/\/beiyutitanium.com\/it\/titanium-bar-rfq-checklist\/\">lista di controllo per la richiesta di offerta di barre di titanio<\/a> prima di inviare l'email. Inviare il disegno e le condizioni di impiego a <a href=\"mailto:penn@beiyutitanium.com?subject=Titanium%20Bar%20RFQ\">penn@beiyutitanium.com<\/a> e risponder\u00f2 sulle voci ancora aperte.<\/p>\n<div class=\"c118-product-links\">\n          <a class=\"c118-product-link\" href=\"https:\/\/beiyutitanium.com\/it\/product\/grade-2-titanium-bar\/\"><br \/>\n            <img decoding=\"async\" src=\"https:\/\/beiyutitanium.com\/wp-content\/uploads\/2026\/05\/grade2-titanium-bar-astm-b348-rack-main-20260613.jpg\" alt=\"Grade 2 commercially pure titanium round bars\"><br \/>\n            <span><strong>Barra di titanio Grade 2<\/strong><small>Barra commercialmente pura quotata secondo l'ordine<\/small><\/span><br \/>\n          <\/a><br \/>\n          <a class=\"c118-product-link\" href=\"https:\/\/beiyutitanium.com\/it\/product\/6al4v-titanium-bar\/\"><br \/>\n            <img decoding=\"async\" src=\"https:\/\/beiyutitanium.com\/wp-content\/uploads\/2026\/03\/ti-6al4v-grade5-titanium-bar-ams4928.jpg\" alt=\"Grade 5 Ti-6Al-4V titanium round bar\"><br \/>\n            <span><strong>Barra in titanio Grade 5<\/strong><small>Barra Ti-6Al-4V secondo la specifica indicata nell'ordine<\/small><\/span><br \/>\n          <\/a>\n        <\/div>\n<\/article>\n<aside class=\"c118-sidebar\">\n<div class=\"c118-side-block\">\n<p class=\"c118-eyebrow\">Prima del rilascio<\/p>\n<h3>Leggere il certificato rispetto all'ordine d'acquisto<\/h3>\n<p>I risultati del controllo e l'identit\u00e0 della colata o del lotto devono corrispondere a grado, norma e stato ordinati dall'acquirente. Il documento non corregge una descrizione d'acquisto incompleta.<\/p>\n<\/p><\/div>\n<div class=\"c118-side-block\">\n<h3>Riferimenti per le barre<\/h3>\n<p>          <a href=\"https:\/\/beiyutitanium.com\/it\/astm-b348-titanium-bar-billet-guide\/\">guida alle barre e billette ASTM B348<\/a><br \/>\n          <a href=\"https:\/\/beiyutitanium.com\/it\/machining-titanium-bar-stock-guide\/\">Lavorazione meccanica di semilavorati in barra di titanio<\/a><br \/>\n          <a href=\"https:\/\/beiyutitanium.com\/it\/titanium-bar-forms-sizes-tolerances-guide\/\">Forme, dimensioni e tolleranze delle barre<\/a><br \/>\n          <a href=\"https:\/\/beiyutitanium.com\/it\/titanium-bar-rfq-checklist\/\">Lista di controllo della richiesta di offerta per barra in titanio<\/a><br \/>\n          <a href=\"https:\/\/beiyutitanium.com\/it\/titanium-grades-comparison-guide\/\">Tabella dei gradi di titanio<\/a>\n        <\/div>\n<div class=\"c118-side-cta\">\n<h3>Inviare il disegno<\/h3>\n<p>Penn esamina le richieste di barre di titanio per Beiyu. Includere le condizioni di impiego quando la voce relativa al grado \u00e8 ancora aperta.<\/p>\n<p>          <a class=\"c118-button\" href=\"mailto:penn@beiyutitanium.com?subject=Titanium%20Bar%20RFQ\">Inviare un'email a Penn<\/a>\n        <\/div>\n<\/aside>\n<\/section><\/div>\n<p><!--c143-cite-block--><\/p>\n<h2>Cosa resta da definire nell'ordine dopo la scelta del grado<\/h2>\n<p>La scelta del grado definisce la metallurgia. Non definisce i quattro campi che determinano se la barra pu\u00f2 essere lavorata meccanicamente nello stato di consegna, e una guida alla selezione che si ferma al grado lascia all'acquirente il compito di scoprirli al ricevimento.<\/p>\n<table>\n<thead>\n<tr>\n<th>Campo che il grado non determina<\/th>\n<th>Cosa controlla<\/th>\n<th>Dove si applica<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Tolleranza sul diametro<\/td>\n<td>Se la barra pu\u00f2 essere inserita direttamente in una pinza<\/td>\n<td>Indicata con il diametro, come classe o valore<\/td>\n<\/tr>\n<tr>\n<td>rettilineit\u00e0<\/td>\n<td>Avanzamento, vibrazioni e comportamento del caricatore di barre<\/td>\n<td>Un valore con la lunghezza di misura su cui si applica<\/td>\n<\/tr>\n<tr>\n<td>Stato superficiale<\/td>\n<td>Sovrametallo di lavorazione e rimozione dell'alpha case<\/td>\n<td>Indicata separatamente dallo stato di fornitura<\/td>\n<\/tr>\n<tr>\n<td>Ambito dei controlli<\/td>\n<td>Cosa viene controllato e secondo quale classe di accettazione<\/td>\n<td>Indicato nell'ordine d'acquisto, non presunto<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Cosa pubblica Beiyu sul ciclo delle barre rettificate di precisione<\/h2>\n<p>Questi valori si applicano al processo documentato di rettifica senza centri che copre diametri da 3,175 mm a 25,4 mm. Rappresentano una capacit\u00e0 produttiva rispetto alla quale valutare la richiesta, non una dichiarazione di disponibilit\u00e0 a magazzino, e la combinazione ordinata viene confermata in sede di offerta.<\/p>\n<table>\n<thead>\n<tr>\n<th>Campo<\/th>\n<th>Valore pubblicato<\/th>\n<th>Ridotta a<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Tolleranza sul diametro<\/td>\n<td>&plusmn;0,0127 mm (&plusmn;0,0005 in)<\/td>\n<td>&plusmn;0,0076 mm su richiesta<\/td>\n<\/tr>\n<tr>\n<td>rettilineit\u00e0<\/td>\n<td>0,5 mm per metro<\/td>\n<td>0,3 mm per metro su diametri fino a 25 mm, una soglia distinta dal limite di 25,4 mm del processo<\/td>\n<\/tr>\n<tr>\n<td>Esame<\/td>\n<td>A ultrasuoni, a correnti indotte, ottico della superficie, laser del diametro e della rettilineit\u00e0, ciascuno sul 100 per cento del lotto<\/td>\n<td>Classe di accettazione indicata nell'ordine<\/td>\n<\/tr>\n<tr>\n<td>Certificato<\/td>\n<td>Certificato di collaudo 3.1 secondo EN 10204 con tracciabilit\u00e0 tramite il numero di colata<\/td>\n<td>Ambito di rendicontazione definito dall'ordine<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Questi controlli appartengono al programma di precisione oggetto dell'offerta e non si estendono all'intero intervallo delle barre tonde da 1 mm a 500 mm. Un grado scelto correttamente e un processo non dichiarato producono comunque un'offerta inutilizzabile per il disegno.<\/p>\n<h2>Dettagli delle specifiche con fonti<\/h2>\n<p>Dati sulle propriet\u00e0 dell'ASM Handbook e le <a href=\"https:\/\/store.astm.org\/standards\/b348\" target=\"_blank\" rel=\"noopener\">ASTM B348<\/a> acceptance tables make the Grade 2 versus Grade 5 titanium bar decision concrete. On strength, B348 sets annealed Grade 5 bar at 828 MPa minimum yield against 275 MPa for Grade 2, 3 times the acceptance floor; on mass, the handbook densities sit within 2 percent of each other at 4.51 g\/cm&sup3; for Grade 2 and 4.43 g\/cm&sup3; for Ti-6Al-4V, so nearly the whole 3-to-1 strength advantage survives on a per-kilogram basis. On heat, ASM Handbook thermal-conductivity values place Ti-6Al-4V near 6.7 W\/m&middot;K against roughly 16 to 22 W\/m&middot;K for the commercially pure grades, which is the measured property behind this page&#8217;s note that Grade 5 keeps cutting heat concentrated at the tool edge.<\/p>\n<p>Beiyu Titanium quotes both grades from one bar envelope, round bar from 1 to 500 mm diameter in lengths to 6,000 mm with tolerance classes h6 to h9 and H6 to H9 on request, so a Grade 2 line and a Grade 5 line can be priced side by side at the same section, length and condition. In Beiyu&#8217;s supply practice the two grades travel as 2 separate order lines, each stating grade, condition and section, because a certificate issued against one line cannot be read across to the other.<\/p>\n<p><!--\/c143-cite-block--><\/p>","protected":false},"excerpt":{"rendered":"<p>Grade 2 bar is the usual starting point when corrosion service, forming or welding drives the choice. Grade 5 bar is the higher-strength route for loaded machined parts. The drawing, service environment, supplied condition and governing standard decide between them, so I stop an RFQ that names only ASTM B348 and ask for the missing [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":4231,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_templately_pack_id":"","_templately_imported_at":"","_templately_source":"","_templately_import_session_id":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[27,137],"tags":[],"class_list":["post-4393","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-technical-guides"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Grade 2 vs Grade 5 Titanium Bar: Selection Guide | Beiyu<\/title>\n<meta name=\"description\" content=\"Choose Grade 2 or Grade 5 titanium bar by service, strength, fabrication, machining, condition and RFQ requirements, with ASTM B348 ordering context.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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Titanium\"},\"image\":{\"@id\":\"https:\\\/\\\/beiyutitanium.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.linkedin.com\\\/company\\\/113015050\\\/\",\"https:\\\/\\\/www.youtube.com\\\/channel\\\/UC4Rr5qjUmKbbnROzU8zwluQ\",\"https:\\\/\\\/www.instagram.com\\\/beiyutrade\\\/\",\"https:\\\/\\\/www.facebook.com\\\/people\\\/Beiyu-Titanium-Group\\\/61580787646046\\\/\",\"https:\\\/\\\/www.crunchbase.com\\\/organization\\\/beiyu-titanium\",\"https:\\\/\\\/www.wikidata.org\\\/wiki\\\/Q140386451\"],\"contactPoint\":{\"@type\":\"ContactPoint\",\"contactType\":\"sales\",\"email\":\"penn@beiyutitanium.com\",\"availableLanguage\":[\"English\",\"Chinese\"]},\"description\":\"Beiyu Titanium (legal entity Jiaxing Beiyu New Materials Technology Co., Ltd.) is a China-based supplier and exporter of ASTM and AMS titanium bar, plate, sheet, tube, pipe, forgings, flanges, fasteners and custom machined parts, plus nickel and Inconel alloys, for chemical, marine, medical and industrial buyers worldwide. Production runs through the Beiyu titanium mill in Baoji, Shaanxi. Orders are RFQ-based, with EN 10204 3.1 mill test certificates and heat-number traceability available on request.\",\"areaServed\":\"Worldwide\",\"knowsAbout\":[\"Titanium\",\"Titanium alloy\",\"Titanium bar\",\"Titanium sheet and plate\",\"Titanium tube and pipe\",\"Titanium forgings\",\"Titanium wire\",\"Titanium anode\"],\"address\":{\"@type\":\"PostalAddress\",\"streetAddress\":\"Baotai Road Industrial Park, High-tech Development Zone\",\"addressLocality\":\"Baoji\",\"addressRegion\":\"Shaanxi\",\"addressCountry\":\"CN\"},\"legalName\":\"Jiaxing Beiyu New Materials Technology Co., Ltd.\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/beiyutitanium.com\\\/#\\\/schema\\\/person\\\/3560db17cf08813edf34f012735b971b\",\"name\":\"Penn Ma\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"it-IT\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/0659bdefb633d0d8e567b06d2f8bffac2a369834e53e96c922a06fd8a96f3c72?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/0659bdefb633d0d8e567b06d2f8bffac2a369834e53e96c922a06fd8a96f3c72?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/0659bdefb633d0d8e567b06d2f8bffac2a369834e53e96c922a06fd8a96f3c72?s=96&d=mm&r=g\",\"caption\":\"Penn Ma\"},\"description\":\"Penn Ma is the person who answers the RFQs at Beiyu Titanium. Over 15 years in titanium export he has learned to review each specification line himself, checking grade, standard, dimensions, tolerance and certificate scope against mill capability before quoting, rather than routing enquiries through a sales desk. He came to titanium supply from the other side of the transaction. Before leading Beiyu's international business he worked at Koch (Koch-Glitsch) and was directly involved in delivering a SABIC petrochemical project in Fujian, China. That work was built on inspection and test plans, material certification and heat traceability, third party inspection coordination, and project documentation and dossier control. Those are the same four things a process industry or regulated buyer will hold a titanium supplier to, and having had to enforce them as a customer is why they are treated here as part of the supply rather than as paperwork produced afterwards. His day-to-day work spans the questions this site is written to answer: choosing between commercially pure and alloyed titanium grades for a corrosive service, reading a mill test certificate against the ordered standard, and matching a buyer's designation (ASTM grade, UNS, German Werkstoff number or French NF code) to the same metal across markets. Beiyu supplies titanium, nickel-alloy and refractory mill products across bar, rod, plate, tube, block, ring, coil, ingot, forgings and machined parts, with EN 10204 3.1 documentation and heat-number traceability.\",\"url\":\"https:\\\/\\\/beiyutitanium.com\\\/it\\\/author\\\/penn-ma\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Barra in titanio Grade 2 e Grade 5: guida alla scelta | Beiyu","description":"Scegliere la barra in titanio Grade 2 o Grade 5 in base a servizio, resistenza, fabbricazione, lavorazione meccanica, stato e requisiti della richiesta di offerta, nel contesto degli ordini ASTM B348.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/beiyutitanium.com\/it\/titanium-bar-grade-selection-guide\/","og_locale":"it_IT","og_type":"article","og_title":"Grade 2 vs Grade 5 Titanium Bar: Selection Guide | 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Titanium"},"image":{"@id":"https:\/\/beiyutitanium.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.linkedin.com\/company\/113015050\/","https:\/\/www.youtube.com\/channel\/UC4Rr5qjUmKbbnROzU8zwluQ","https:\/\/www.instagram.com\/beiyutrade\/","https:\/\/www.facebook.com\/people\/Beiyu-Titanium-Group\/61580787646046\/","https:\/\/www.crunchbase.com\/organization\/beiyu-titanium","https:\/\/www.wikidata.org\/wiki\/Q140386451"],"contactPoint":{"@type":"ContactPoint","contactType":"sales","email":"penn@beiyutitanium.com","availableLanguage":["English","Chinese"]},"description":"Beiyu Titanium (ragione sociale Jiaxing Beiyu New Materials Technology Co., Ltd.) \u00e8 un fornitore ed esportatore con sede in Cina di barre, lamiere spesse, lamiere sottili, tubi, tubi per tubazioni, pezzi forgiati, flange, elementi di fissaggio e pezzi su misura lavorati meccanicamente in titanio ASTM e AMS, oltre a leghe di nichel e Inconel, per acquirenti dei settori chimico, marino, medicale e industriale in tutto il mondo. La produzione avviene presso lo stabilimento produttore di titanio Beiyu a Baoji, Shaanxi. Gli ordini si basano su richieste di offerta, con certificati di collaudo 3.1 secondo EN 10204 e tracciabilit\u00e0 tramite il numero di colata disponibili su richiesta.","areaServed":"Worldwide","knowsAbout":["Titanium","Titanium alloy","Titanium bar","Titanium sheet and plate","Titanium tube and pipe","Titanium forgings","Titanium wire","Titanium anode"],"address":{"@type":"PostalAddress","streetAddress":"Baotai Road Industrial Park, High-tech Development Zone","addressLocality":"Baoji","addressRegion":"Shaanxi","addressCountry":"CN"},"legalName":"Jiaxing Beiyu New Materials Technology Co., Ltd."},{"@type":"Person","@id":"https:\/\/beiyutitanium.com\/#\/schema\/person\/3560db17cf08813edf34f012735b971b","name":"Penn Ma","image":{"@type":"ImageObject","inLanguage":"it-IT","@id":"https:\/\/secure.gravatar.com\/avatar\/0659bdefb633d0d8e567b06d2f8bffac2a369834e53e96c922a06fd8a96f3c72?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/0659bdefb633d0d8e567b06d2f8bffac2a369834e53e96c922a06fd8a96f3c72?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/0659bdefb633d0d8e567b06d2f8bffac2a369834e53e96c922a06fd8a96f3c72?s=96&d=mm&r=g","caption":"Penn Ma"},"description":"Penn Ma \u00e8 la persona che risponde alle RFQ presso Beiyu Titanium. In oltre 15 anni nell'esportazione di titanio ha imparato a riesaminare personalmente ogni riga della specifica, verificando grado, norma, dimensioni, tolleranza e ambito del certificato rispetto alla capacit\u00e0 dello stabilimento produttore prima di formulare un'offerta, anzich\u00e9 inoltrare le richieste attraverso un ufficio vendite. \u00c8 arrivato alla fornitura di titanio dall'altra parte della transazione. Prima di guidare l'attivit\u00e0 internazionale di Beiyu ha lavorato presso Koch (Koch-Glitsch) ed \u00e8 stato direttamente coinvolto nella consegna di un progetto petrolchimico SABIC a Fujian, Cina. Tale lavoro si basava su piani di controllo e prova, certificazione dei materiali e tracciabilit\u00e0 tramite il numero di colata, coordinamento del collaudo di terza parte e controllo della documentazione e dei dossier di progetto. Sono le stesse quattro cose a cui un acquirente dell'industria di processo o regolamentato sottoporr\u00e0 un fornitore di titanio, e aver dovuto farle rispettare come cliente spiega perch\u00e9 qui siano trattate come parte della fornitura anzich\u00e9 come documentazione prodotta in seguito. Il suo lavoro quotidiano copre le questioni a cui questo sito intende rispondere: scegliere tra gradi di titanio commercialmente puro e legato per un servizio corrosivo, leggere un certificato del materiale rispetto alla norma ordinata e associare la designazione di un acquirente (grado ASTM, UNS, numero Werkstoff tedesco o codice NF francese) allo stesso metallo nei vari mercati. Beiyu fornisce prodotti di stabilimento in titanio, leghe di nichel e metalli refrattari in barra, tondo, lamiera spessa, tubo, blocco, anello, bobina, lingotto, pezzi forgiati e pezzi lavorati, con documentazione EN 10204 3.1 e tracciabilit\u00e0 tramite il numero di colata.","url":"https:\/\/beiyutitanium.com\/it\/author\/penn-ma\/"}]}},"_links":{"self":[{"href":"https:\/\/beiyutitanium.com\/it\/wp-json\/wp\/v2\/posts\/4393","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/beiyutitanium.com\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/beiyutitanium.com\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/beiyutitanium.com\/it\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/beiyutitanium.com\/it\/wp-json\/wp\/v2\/comments?post=4393"}],"version-history":[{"count":12,"href":"https:\/\/beiyutitanium.com\/it\/wp-json\/wp\/v2\/posts\/4393\/revisions"}],"predecessor-version":[{"id":5521,"href":"https:\/\/beiyutitanium.com\/it\/wp-json\/wp\/v2\/posts\/4393\/revisions\/5521"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/beiyutitanium.com\/it\/wp-json\/wp\/v2\/media\/4231"}],"wp:attachment":[{"href":"https:\/\/beiyutitanium.com\/it\/wp-json\/wp\/v2\/media?parent=4393"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/beiyutitanium.com\/it\/wp-json\/wp\/v2\/categories?post=4393"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/beiyutitanium.com\/it\/wp-json\/wp\/v2\/tags?post=4393"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}