HEAT-RESISTANT AUSTENITIC STAINLESS · GRADE-AND-SERVICE CONTROLLED
310S & 310H Stainless Steels — High-Temperature Sourcing
Technical sourcing of S31008 / S31009 and EN 1.4845 material for high-temperature equipment, piping and fabricated components.
MNK-G.S.A coordinates 310S and 310H flat, long, tubular and forged product inquiries against the exact grade, product standard, temperature regime, environment and inspection plan.
Grade Identity and Verification
- 310S (UNS S31008) and 310H (UNS S31009) are carbon-controlled variants within the high-chromium, high-nickel 25/20 austenitic stainless family.
- The two designations are not automatic substitutes. The requested carbon range, creep requirements, heat treatment, product standard and design code control the order.
- Manufacturer literature maps 310S and 310H products to EN 1.4845, but the exact EN designation and product-specific certificate must still be verified.
- Manufacturer guidance lists furnace equipment, heat-treatment baskets, thermowells, heat exchangers, boiler and refinery equipment, valves, flanges and high-temperature tube as application contexts.
- Published producer temperature guidance differs by product and environment. It is context, not a universal design temperature or life guarantee.
Product Forms, Standards and Supply Formats
| Flat products | Cold- or hot-rolled coil, sheet, strip, plate and cut blanks under ASTM A240/A480 or EN 10088-2, where the ordered grade is included |
| Producer flat-product example | One current Aperam 310S programme lists coils and sheets at 0.40–12 mm thick and widths up to 1,524 mm; quotation remains subject to grade, finish, width, length and current mill availability |
| Long and semi-finished products | Bar, rod, wire, sections, billets and forging stock under ASTM A276/A479/A314 or EN 10088-3, with exact carbon-controlled grade verification |
| Tube and pipe | Seamless or welded high-temperature tube and pipe under the applicable ASTM A213/A312 or EN 10216-5/EN 10217-7 product route |
| Forgings and components | Flanges, fittings, valves, rings and high-temperature parts under ASTM A182/A965, EN 10222-5 or a customer drawing and approved material specification |
| Fabricated supply | Cut plate, formed parts, furnace internals, baskets, supports, sleeves or machined components after welding, forming, heat-treatment and acceptance requirements are defined |
Application Context
Potential applications include furnace and heat-treatment equipment, high-temperature piping, boiler and refinery components, thermowells, heat exchangers, valves, flanges and fabricated internals. Selection must account for continuous or cyclic exposure, oxidation, carburization, sulfidation, nitriding, low-oxygen gases, condensates, creep loading and thermal fatigue. A producer’s maximum-air-temperature statement cannot replace design-code calculations.
RFQ and Quality Controls
- 310S / S31008 or 310H / S31009 and the governing product standard
- Continuous and upset temperatures, dwell time, thermal cycling and design life
- Gas composition, oxygen potential, sulphur, carbon activity and condensate conditions
- Product form, dimensions, tolerances, finish and heat-treatment condition
- Creep, mechanical, NDT, grain-size, pressure-code and fabrication requirements
- Certificate type, heat traceability, quantity, packing and destination
Related Technical Pages
Technical Sources
- ASTM A240/A240M-26
- ASTM A276/A276M-25
- ASTM A479/A479M-25
- ASTM A182/A182M-26a
- ASTM A965/A965M-26
- BS EN 10088-2:2024
- BS EN 10088-3:2023
- BS EN 10216-5:2021
- BS EN 10217-7:2021
- ISO 15510:2014
- Outokumpu Therma range datasheet
- Alleima 7RE10 / 310S-310H datasheet
- Aperam 310S producer programme
The cited manufacturer programmes describe specific products and conditions. MNK does not extend a flat-product temperature statement, dimension or grade identity automatically to bar, tube, forgings or fabricated parts. The exact product standard and certificate control the supply.
Related ASTM Reference Pages
Select the governing specification by product form and service route. The standard designation does not by itself confirm that a particular grade, condition or project requirement is included.
- ASTM A240/A240M-26 — plate, sheet and strip
- ASTM A276/A276M-25 — bars and shapes
- ASTM A479/A479M-25 — bars for pressure service
- ASTM A312/A312M-25 — austenitic stainless pipe
- ASTM A182/A182M-26a — forged piping components
- ASTM A965/A965M-26 — austenitic stainless forgings
Relevant EN Product-Form References
These references support order preparation by product form. The current authorised standard, material grade, edition, design code and project documents must be verified before quotation.
Relevant ISO References
Use the current authorised edition together with the governing product specification, project requirements and inspection documents. A standards reference does not establish automatic grade equivalence or product approval.
Send Your Technical Inquiry
Send 310S or 310H, the product standard, form and dimensions, continuous and peak temperatures, atmosphere, loading, fabrication and inspection requirements, quantity and destination.