Stainless Steel 310 | SUS310 | UNS S31000 | 1.4845 | ss310s | AISI 310

Stainless Steel 310 / 310SUNS S31000 · S31008 · EN 1.4845 · AISI 310

SS310 is a heat-resistant stainless steel that keeps its strength and resists scaling where ordinary stainless fails — its 24–26% chromium and 19–22% nickel give oxidation resistance up to about 1100°C. E Steel holds it in ready stock, cut to size, no minimum order, certified to ASTM A240, EN 10095 and ASME SA-240.

~1100°Coxidation resistance

25%chromium (nom.)

20%nickel (nom.)

−268°Ccryogenic toughness

Heat resistant · furnace grade

No MOQ · order 1 piece

Cut to size · fine cut

Certified · mill cert supplied

What SS310 Is

SS310 (UNS S31000) is a high-chromium, high-nickel austenitic stainless steel developed for high-temperature service. Where SS304 begins to scale and lose strength as the heat climbs, SS310's heavier alloying forms a stable oxide layer that protects it in continuous high-heat environments — furnaces, kilns, combustion chambers and heat-treatment equipment. It also stays tough at the other extreme, holding ductility down to cryogenic temperatures with low magnetic permeability.

310S (UNS S31008) is the low-carbon version, easier to weld and less prone to carbide precipitation during fabrication and long high-temperature exposure. 310H (UNS S31009) is the controlled higher-carbon version for improved creep strength. One limit to note: SS310 handles oxidising and moderately carburising atmospheres well, but severe carburising or high-sulfur reducing atmospheres may call for a dedicated nickel alloy such as 330 — tell us the atmosphere and we'll confirm suitability.

Material SpecificationDesignationsSS310 · 310S · 310H · UNS S31000 / S31008 / S31009 · EN 1.4845

StandardsASTM A240 · EN 10095 · ASME SA-240 · A276 · A479

TypeHeat-resistant austenitic stainless steel

Nominal compositionCr 24–26% · Ni 19–22% · Mn ≤2% · Si ≤1.5%

Carbon310 ≤0.25% · 310S ≤0.08%

Oxidation resistanceto ~1100 °C (2010 °F),

Low-temperature useTough to cryogenic temperatures (~−268 °C)

Density≈7.9 g/cm³

Available forms Plate, sheet , Round Bar— cut to size

Thickness range 0.5mm to 60mm , Round Bar Dia 3mm to 150mm

Minimum order None — single piece accepted

DocumentationMill certificate & traceability supplied

Where SS310 Is Used

• Furnace equipmentLinings, muffles, rollers, burner parts
• Heat treatmentBaskets, trays, fixtures, jigs
• Radiant & thermocouple tubesProtection tubes, wells
• Power & boilersBaffles, fire-box sheets, supports
• Kilns & thermal processingKiln furniture, calciners
• Cryogenic componentsLow-temperature, low-permeability parts

Stock & Quote

Tell us the grade, dimensions and — for high-heat jobs — the service temperature and atmosphere. We'll confirm SS310 or 310S availability from ready stock, cut it to size, and supply the mill certificate. No minimum order.

Frequently Asked Questions

What is SS310 stainless steel used for?

SS310 is a heat-resistant austenitic stainless steel used for high-temperature service such as furnace parts and linings, radiant tubes, heat-treatment baskets and fixtures, kiln furniture, boiler baffles and thermocouple protection tubes. Its high chromium and nickel content give it strong oxidation and scaling resistance.

What is the maximum service temperature of SS310?

SS310 resists oxidation up to about 1100 degrees Celsius (2010 degrees Fahrenheit) under mildly cyclic conditions. Frequent thermal cycling lowers that limit, so the exact continuous and intermittent service temperatures depend on the atmosphere and should be confirmed for each application.

What is the difference between 310, 310S and 310H?

They are the same base alloy at different carbon levels. Standard 310 has higher carbon for strength, 310S is the low-carbon version with better weldability and less carbide precipitation, and 310H has controlled higher carbon for improved creep resistance at very high temperatures. In many plates the chemistry meets both 310S and 310H requirements.

How is SS310 different from SS304?

SS310 has much higher chromium (24 to 26 percent) and nickel (19 to 22 percent) than SS304, which is why it withstands continuous high-temperature service above 1000 degrees Celsius where SS304 would scale and lose strength. SS304 is the cheaper choice for ambient and mildly warm service, while SS310 is chosen for furnaces and high-heat environments.

Does E Steel stock SS310, and is there a minimum order?

Yes. E Steel holds ready-stock SS310 and 310S plate, cut to size from its warehouse in Malaysia with no minimum order quantity, certified to ASTM A240, EN 10095 and ASME SA-240 with a mill certificate on every order.