Stainless Steel 310S Seamless Pipes & Tubes Manufacturer & Supplier
SS 310S (UNS S31008) is a high-chromium, high-nickel austenitic stainless steel designed for outstanding high-temperature oxidation resistance. With 25% Cr and 20% Ni, it maintains strength and resists scaling up to 1150C, making it ideal for furnace and heat treatment applications.
UNS: S31008 | Category: Austenitic Stainless Steel | Werkstoff Nr: 1.4845 | EN Name: X8CrNi25-21
SS 310S — Also Known As
SS 310S is also commonly known as SS 310S, 310S SS, Stainless Steel 310S Seamless Pipes & Tubes, S31008, UNS S31008, 1.4845, Werkstoff 1.4845, W.Nr 1.4845, X8CrNi25-21, 310s, aisi 310s.
SS 310S — Applicable Standards & Specifications
SS 310S is commonly supplied to ASTM A312, ASME SA312, ASTM A213, ASME SA213, ASTM A269, ASME SA269, EN 10216-5, DIN 17456.
Size Range
Outer Diameter: 1/4" NPS to 10" NPS (6.35mm to 273.1mm OD)
Wall Thickness: SCH 5S to SCH 80S
Chemical Composition (%)
| C | Mn | Si | Cr | Ni | P | S |
|---|---|---|---|---|---|---|
| 0.08 max | 2.00 max | 1.50 max | 24.0-26.0 | 19.0-22.0 | 0.045 max | 0.030 max |
Mechanical Properties
- Tensile Strength
- 515 MPa min
- Yield Strength
- 205 MPa min
- Elongation
- 35% min
- Hardness
- 95 HRB max
Physical Properties
- Density
- 7.98 g/cm3
- Melting Range
- 1400-1455 C
- Thermal Conductivity
- 14.2 W/m-K
- Electrical Resistivity
- 780 nOhm-m
- Specific Heat
- 500 J/kg-K
- Coeff. of Thermal Expansion
- 15.9 um/m-C
Corrosion Resistance
- Pitting Resistance (PREN)
- ~25
- Max Service Temp (Oxidizing)
- 1150 C (intermittent 1035 C continuous)
- Intergranular Corrosion
- Moderate susceptibility
- Stress Corrosion Cracking
- Good resistance due to high Ni
- General Corrosion Rate
- Excellent in oxidizing environments
- Seawater Resistance
- Moderate
Applicable Standards
- ASTM A312 / ASME SA312
- ASTM A213 / ASME SA213
- DIN EN 10216-5
Applications
- Furnace components and radiant tubes
- Heat treatment baskets and fixtures
- Kiln liners and burner nozzles
- Thermal processing equipment
- Flare tips and stacks
- Cement plant equipment
Industries Served
- Heat Treatment
- Cement
- Power Generation
- Steel Making
- Glass Manufacturing
Key Advantages
- Highest temperature resistance among standard austenitic grades
- Excellent oxidation and scaling resistance to 1150C
- Good strength retention at elevated temperatures
- Resistant to sulfidation at high temperatures
- Non-magnetic even after cold work
Equivalent Grades
- ASTM
- TP310S
- JIS
- SUS 310S
- BS
- 310S16