Grade 5 Titanium Bar | Ti-6Al-4V Round Bar

PURCHASE ROUTE

One alloy name, multiple purchase routes

Grade 5, Ti-6Al-4V and 6Al-4V all identify UNS R56400. They do not tell us which product standard, condition, dimensional rules or certificate package the buyer expects. The drawing and purchase order do that. Sending those details with the RFQ avoids pricing one route against a different acceptance basis.

Industrial bar: ASTM B348 or ASME SB-348 with drawing and PO controls
Annealed aerospace bar: AMS 4928 or another AMS route only when the drawing or PO cites it
Higher-strength condition: Review the ordered STA route separately, including AMS 4965 where applicable. Compare annealed and STA conditions

How the range should be read: The dimensions below describe what Beiyu can review across its titanium bar programs. They are not a live-stock list. The available combination still depends on the drawing, ordered standard, condition, quantity and inspection plan.

FORMS AND SIZE RANGE

Bar forms and the size range Beiyu reviews

Supply envelope: round bar runs Ø1-500 mm, square bar 3×3 mm to 500×500 mm, flat bar 3×12.7 mm to 30×500 mm and hexagonal bar to 17 mm across flats; the centerless-ground program covers Ø3.175-25.4 mm.

Grade 5 enquiries are reviewed within Beiyu's overall titanium bar capability. A diameter may be technically possible but unavailable in the requested condition or certificate route, so size is checked together with finish, tolerance, quantity and inspection.

Bar form	Overall capability envelope	RFQ controls
Round bar / rod	Ø1-500 mm Length ≤6000 mm	Diameter, tolerance, straightness, surface route, cut length, machining allowance and delivered condition
Square bar	3×3 mm to 500×500 mm Length ≤6000 mm	Section, corner condition, allowance, dimensional tolerance and cut length
Flat bar	3×12.7 mm to 30×500 mm Length ≤6000 mm	Thickness, width, allowance on each face, flatness and length tolerance
Hexagonal bar	Across flats ≤17 mm Length ≤6000 mm	Across-flats dimension, corner condition, straightness, cut length and delivered condition

Precision-ground bar is a separate program

A centerless-ground program covers Ø3.175-25.4 mm and includes a Grade 5 route. The quoted diameter tolerance and straightness apply only to that program. They should not be copied to every Grade 5 size shown above.

Read the titanium bar forms and tolerances guide

What is checked on the precision ground bar route, and how it is reported

Grade 5 bar is ordered in two different ways, and the inspection package is what separates them. The mill route is accepted against the product standard named on the order, whether that is ASTM B348 or an AMS bar specification. The documented centerless ground route carries the checks below on the whole lot, stated as fields that can be verified on receipt rather than as adjectives.

Check	Coverage	What it settles
Ultrasonic flaw detection	100 percent of the lot	Internal discontinuities against the acceptance class named on the order
Eddy current	100 percent of the lot	Surface and near surface discontinuities
Optical surface inspection	100 percent of the lot	Visible surface condition along the full length
Infrared laser diameter measurement	100 percent of the lot	Diameter through the length, not a spot check at the ends
Straightness	100 percent of the lot	Bow against the published value, measured over a stated gauge length

Five checks at full coverage is a different statement from five checks performed on samples, which is why the coverage column exists. Where an order needs a tighter acceptance class or an additional examination, that belongs in the purchase order text and is reviewed before the enquiry is priced.

The published values the precision route is held to

These values apply to the documented centerless ground route covering diameters 3.175 mm to 25.4 mm. They are a production capability reviewed against, not a stock statement, and the ordered combination is confirmed at quotation.

Field	Published value	Tightened to
Diameter tolerance	±0.0127 mm (±0.0005 in)	±0.0076 mm on request
Straightness	0.5 mm per metre	0.3 mm per metre on diameters up to 25 mm, and to the drawing where the order requires tighter
Certificate	EN 10204 3.1 mill test certificate with heat number traceability	Reporting scope set by the order

These tolerance and straightness controls belong to the quoted precision program. They are not carried across to the full Ø1 to 500 mm round bar envelope, and an order that needs them on a diameter outside the ground route is a different conversation, not a tighter line on the same one. State on the enquiry which route the drawing assumes, because the same nominal diameter is a different piece of work on each.

MATERIAL STANDARD

The alloy name does not choose the purchase standard

Industrial, aerospace, implant-chain and regional specifications can all call for Ti-6Al-4V bar. They are not interchangeable certificates for the same stock. Beiyu reviews the route named by the drawing or purchase specification and does not infer one standard from the alloy name alone.

Purchase route	Use it when	RFQ must still state
ASTM B348 / ASME SB-348	The industrial bar or billet purchase order cites this material route	Grade, revision, size, tolerance, condition, finish, inspection and certificate scope
AMS 4928	The drawing or PO names the annealed Ti-6Al-4V bar, wire, forging or forging-stock route	Ordered revision, product form, condition, dimensions, test and document package, marking and traceability
AMS 4965	The drawing or PO names the solution-treated-and-aged Ti-6Al-4V bar, forging or ring route	The governing specification, heat-treatment condition, acceptance properties and any post-treatment dimensional controls
AMS 4967	The drawing or PO requires annealed Ti-6Al-4V material to satisfy AMS 4967 heat-treatability and post-heat-treatment response requirements; AMS 4928 is the annealed-as-delivered route without that AMS 4967 response requirement	Ordered revision, product form, delivered condition, heat-treatment responsibility, dimensions, tests and document package
AMS 6931	The drawing or PO specifically names this annealed Ti-6Al-4V bar, forging or forging-stock route	Ordered revision, form, condition, dimensions, test scope and document package; do not substitute AMS 4928 by assumption
ASTM F1472	The order names ASTM F1472 for wrought standard-interstitial Ti-6Al-4V / UNS R56400 used in a surgical-implant manufacturing chain	Ordered revision, product form and condition, melt and traceability requirements, inspection, quality-system scope and document package; material compliance alone does not certify a finished implant
ISO 5832-3	The order separately names ISO 5832-3 for wrought Ti-6Al-4V used to manufacture surgical implants	Ordered edition, product form, condition, inspection, traceability, quality-system scope and document package; do not treat ISO 5832-3 and ASTM F1472 as automatic alternates
Werkstoff 3.7165 / DIN bar route	A European drawing identifies Ti-6Al-4V by its material number and names the regional bar standard, currently DIN 17862:2025-05	The exact material designation, product standard, revision, dimensions, condition and EN 10204 certificate type
Finished drawing	The purchase is for cut blanks or machined parts, not only raw bar	Drawing revision, finished dimensions, datum scheme, tolerances, inspection plan and material traceability through cutting

Legacy drawing note: AMS-T-9047A

SAE records AMS-T-9047A as canceled in May 2006. If an older drawing cites it for aircraft-quality rolled or forged titanium bar or reforging stock, confirm the cited revision, the alloy callout and the customer-approved current acceptance basis. Cancellation does not establish an automatic superseding equivalence.

If the drawing only says Ti-6Al-4V, do not choose a standard from the alloy name. Use the ASTM, EN/DIN, UNS and Werkstoff cross-reference to identify the naming system, then confirm the governing product specification and revision on the PO. The AMS 4928 guide covers the annealed aerospace route, while the ASTM F1472 guide covers standard-interstitial Ti-6Al-4V for implant manufacturing.

STARTING CONDITION

The finished part determines the right starting bar

Two bars with the same nominal diameter can behave very differently in production. Surface condition, clean-up allowance, straightness, heat treatment and cut strategy affect machining yield and the chance that the finished geometry will clean up.

Worked or forged bar

Suitable when section size and machining stock matter more than a finished surface. The RFQ should identify delivered condition, minimum clean-up allowance, required surface removal and any ordered UT.

Peeled or turned bar

A practical route when the buyer wants the as-worked surface removed before finish machining. Keep the delivered stock diameter separate from the final drawing diameter.

Centerless-ground bar

Used when diameter consistency, finish and straightness are purchase controls. The allowable tolerance comes from the quoted diameter and production program, not one universal website value.

Cut blanks and machined parts

Cut length, end condition, burr control and piece identification need to be agreed before cutting. For machined parts, the drawing and inspection plan control final acceptance.

MACHINING ALLOWANCE

Machining risk is often hidden in the stock allowance

Machining allowance

Show the allowance on each controlled face or diameter. A symmetric allowance is not always suitable for the finished part or sawing route.

Straightness and cut length

Straightness needs a defined measurement span, length tolerance and end condition, plus a statement of whether it is checked on the supplied length or after cutting.

Surface condition and stock removal

Identify whether the delivered surface is as-worked, peeled, turned or ground, plus any required surface removal before finish machining.

Finished-part datum scheme

The drawing should identify which stock faces, centerlines or finished features control dimensional inspection after machining.

Historical quotation example, not a default tolerance

A Grade 5 flat-bar quotation used one-sided, plus-only stock allowances: 0.50 in +0.050/-0 × 0.75 in +0.125/-0 × 72 in +0.125/-0.

The figures belonged to that order, not to every Grade 5 flat bar. They show how a real tolerance line can change the starting stock and machining plan.

INSPECTION AND DOCUMENTS

Certificates and inspection must match the purchase order

"Certificate required" can mean very different things to different buyers. If receiving inspection needs heat traceability, EN 10204 3.1, dimensional reporting or NDT, those items need to appear in the quotation and purchase order.

Material identity

Grade, standard and revision, heat or lot identity, chemistry and mechanical results for the ordered route.

Certificate format

MTC or EN 10204 3.1 inspection certificate when included in the quotation and purchase order.

Dimensional acceptance

Section, length, tolerance, straightness, surface and cut-end checks against the drawing or PO.

Additional inspection

UT, PMI, surface examination, hardness or third-party inspection when required by the ordered specification or purchase order.

Identification

Bundle or piece marking, heat-number continuity and label format suited to the buyer's receiving and machining process.

Release and packing

Inspection hold points, document approval and export packing are agreed before production when buyer release is required.

SUPPLY PHOTOS

Surface and packing examples from titanium bar orders

Grade 5 Ti-6Al-4V titanium round bars with machined ends — Round bars with machined ends. Grade, condition and inspection scope are confirmed for each order.

Polished titanium round bar surface for machining stock review — Polished round-bar surface

Bundle of titanium round bars prepared for identification and packing — Bundled round bars before final packing

RFQ QUESTIONS

Questions buyers ask before ordering Grade 5 bar

Is Grade 5 titanium bar the same alloy as Ti-6Al-4V?

Yes. Grade 5, Ti-6Al-4V and 6Al-4V refer to UNS R56400. They do not by themselves define the governing standard, revision, condition, dimensions, inspection or certificate package.

Which standard should I order for Grade 5 titanium bar?

Use the standard named by the drawing or purchase specification. ASTM B348 or ASME SB-348 is a common industrial route. AMS 4928 covers annealed aerospace material as delivered. AMS 4965 covers an STA route. AMS 4967 is also delivered annealed, but it is ordered when the material must satisfy that specification's heat-treatability and post-heat-treatment response requirements; AMS 4928 does not carry that AMS 4967 response requirement. AMS 6931 is another annealed AMS route and is used only when cited. SAE records AMS-T-9047A as canceled in May 2006; it should only be handled as a legacy drawing callout after the current acceptance basis is confirmed, with no automatic superseding equivalence assumed. ASTM F1472 and ISO 5832-3 are separate implant-chain material standards and must not be assumed to be automatic alternates. A regional drawing may instead name Werkstoff 3.7165 with its product-form standard. These routes are not automatically interchangeable.

Is annealed bar the same as the STA route?

No. Annealed and solution-treated-and-aged material are different ordered conditions. If an STA route is required, state the governing specification and acceptance properties so the heat treatment and test package can be reviewed separately.

What should a Grade 5 bar RFQ include?

Send grade, governing standard and revision, bar form, dimensions, tolerance, straightness, condition, surface, machining allowance, quantity, cut length, inspection, certificate and packing requirements. Attach the drawing when the bar becomes a finished machined part.

For a view of who else publishes this material and what each one states, see Grade 5 Titanium Bar Suppliers: Five Company Pages Compared.

Send the drawing and purchase requirements

Include the governing standard, bar form, dimensions, condition, tolerance, quantity and document scope. Beiyu will check the material route and identify any points that need clarification before quotation.

Send RFQ

Grade 5 Titanium Bar | Ti-6Al-4V (6Al4V) Round Bar