Alloy 825 Tubing | Incoloy 825 Nickel Alloy Tubes

Alloy 825 Tubing for Corrosive Industrial Environments

Supply envelope: seamless tube runs outside diameter 5 mm to 325 mm with wall 0.5 mm to 12 mm and length to 12000 mm; welded tube runs outside diameter 6.35 mm to 1219 mm with wall 0.5 mm to 25 mm and length to the same 12000 mm ceiling; capillary tube runs outside diameter 1 mm to 5 mm with wall 0.1 mm to 2 mm and length to 6000 mm.

Alloy 825, also known as Incoloy 825 or UNS N08825, is a nickel-iron-chromium alloy with additions of molybdenum, copper and titanium. It is selected for industrial environments where resistance to acids, chlorides and stress-corrosion conditions is required by the buyer's engineering specification. Alloy 825 tubing is commonly requested for chemical processing, acid handling, seawater-related equipment, heat exchangers, oil and gas equipment and corrosion-resistant process systems.

Grade and Standards

Alloy 825 (Incoloy 825, UNS N08825) is a nickel-iron-chromium alloy with molybdenum, copper and titanium for resistance to sulphuric and phosphoric acids and to chloride stress-corrosion cracking. For Alloy 825 RFQs, ASTM B163 covers seamless condenser and heat-exchanger tube, ASTM B704 covers welded boiler, heat-exchanger and condenser tube, and ASTM B705 covers welded pipe. State seamless tube, welded tube or welded pipe, outside diameter, wall thickness, length, standard and required chemistry and mechanical-test documentation; final MTC scope is confirmed in the quotation and purchase order.

Product Scope

Beiyu quotes Alloy 825 tubing according to the grade, standard, size and inspection requirement supplied by the buyer. RFQs may involve seamless tubing, welded tubing or cut-to-length tube depending on the required dimensions and project specification. Common reference standards for Alloy 825 tube and pipe may include ASTM B163, ASTM B423, ASTM B704, ASTM B705 and relevant ASME SB specifications. The buyer's purchase specification should confirm the exact standard before quotation.

• Material: Alloy 825 / Incoloy 825 / UNS N08825.
• Product forms: seamless tube, welded tube or project-specific cut lengths.
• RFQ dimensions: outside diameter, wall thickness, length, tolerance and quantity.
• Surface condition: pickled, bright, polished or project-specified finish.
• Documents: MTC, chemical composition, mechanical properties and inspection reports when required.

Application Considerations

Alloy 825 tubing is used in sulfuric acid, phosphoric acid, chloride-containing media, seawater-related equipment, chemical reactors, condensers, heat exchangers and process piping where the engineering specification calls for UNS N08825. The buyer should confirm media concentration, operating temperature, pressure, welding route and whether the tube will be expanded, bent, welded or machined after delivery. Those details affect the required tube condition and inspection scope.

Inspection and Documentation

Nickel alloy tubing projects often require heat number traceability, mill test certificate, dimensional inspection and confirmation of chemical composition and mechanical properties. Additional checks such as hydrostatic testing, eddy-current testing, PMI testing or third-party inspection should be requested before quotation when they are part of the purchase specification. If the tubing is used in pressure equipment or heat exchanger service, include the drawing notes and acceptance criteria.

Packing and RFQ Information

Alloy 825 tubes should be packed to protect ends, surfaces and labels during export shipment. Thin-wall tubing may require end caps, bundle protection, waterproof wrapping or wooden case packing. To quote Alloy 825 tubing, send the standard, OD, wall thickness, length, quantity, seamless or welded route, surface condition, tolerance, inspection requirement, document requirement and destination country. If the order is for a replacement unit, include the existing tube specification or equipment drawing.

FAQ

What is Alloy 825 tubing used for?

Alloy 825 / UNS N08825 tubing is used in chemical processing, acid handling, seawater-related equipment, heat exchangers and process systems where the engineering specification requires this nickel alloy.

Which standards apply to Alloy 825 tube?

Depending on tube type and project specification, buyers may reference ASTM B163, ASTM B423, ASTM B704, ASTM B705 or relevant ASME SB standards. The purchase specification should confirm the exact standard.

What should be included in an Alloy 825 tubing inquiry?

Include standard, OD, wall thickness, length, quantity, seamless or welded route, surface condition, tolerance, inspection scope, document requirement and destination country.

Procurement Notes for Alloy 825 Tubing

Alloy 825 tubing RFQs should define ASTM or ASME standard, outside diameter, wall thickness, length, seamless or welded route, surface condition and quantity. Buyers commonly request Alloy 825 / Incoloy 825 for acidic, chloride-containing or mixed corrosive environments, so the operating medium, temperature and connection method should be included when available.

Useful purchasing details include UNS N08825 requirement, certificate format, heat traceability, PMI, hydrostatic test, eddy current test, end condition and packing requirement. If the tube will be used for heat exchangers or chemical equipment, include tube sheet expansion notes, cleaning requirement and whether EN10204 3.1 documentation is needed.

Common Applications