310S (UNS S31008 / W.Nr. 1.4845)
310S (UNS S31008 / W.Nr. 1.4845) is an austenitic chrome-nickel stainless steel, which features good oxidation resistance, corrosion resistance and acid and alkali resistance. Besides, it embodies excellent high temperature resistance. With high content of chromium and nickel elements, i.e., 25Cr-20Ni, 310S embodies much better creep strength which allows it to work continuously at high temperature (1150 ℃). The high temperature resistant steel tube is specially used for manufacturing electric heating tubes and the like. severely cold worked. It maintains strength at high temperatures as well as sub-zero temperatures.
Equivalent Grades
| Trademark | GB | GOST | ASTM | UNS | DIN | W.Nr. | NF | BS | JIS | SS |
Inox 310S
Acero 310S | 06Cr25Ni20 | – | AISI 310S | S31008 | X8CrNi25-21 | 1.4845 | – | – | – | – |
Chemical Composition, %
| Alloy | C | Si | Mn | P | S | Cr | Ni | Fe |
| 310S | ≤0.08 | ≤1.50 | ≤2.00 | ≤0.045 | ≤0.030 | 24.0-26.0 | 19.0-22.0 | Bal |
Typical Physical and Mechanical Properties (RT, Annealed)
| Density, g/cm3 | Melting Point, ℃ | Tensile Strength, MPa | Yield Strength, MPa | ELongation, % | Hardness, HRB |
| 7.80 | 1030-1180 | ≥515 | ≥205 | ≥40 | ≤95 |
Available Products and Specifications
| Rod, Bar, Wire and Forgings | ASTM A182 |
| Plate, Sheet and Strip | ASTM A167, 240 |
| Pipe and Tube | ASTM A312 |
| Welding Product | – |
| Others | ASTM A403 |
Features
- Outstanding corrosion resistance
- Good aqueous corrosion resistance
- Not prone to thermal fatigue and cyclic heating
- Superior to Type 304 and 309 in most environments
- Good strength in temperatures up to 2100°F
Applications
Because of Type 310S’s excellent general properties a wide range of industries use Type 310S for an number of different applications including:
- Furnaces
- Oil burners
- Heat exchangers
- Welding filler wire and electrodes
- Cryogenics
- Kilns
- Food processing equipment
