Alloy 310/310S (UNS S31000/S31008) austenitic stainless steel pipe is typically used for elevated temperature applications. Its high chromium and nickel content provides comparable corrosion resistance, superior resistance to oxidation, and the retention of a larger fraction of room temperature strength than the common austenitic Alloy 304.
General Properties
Chemical Composition
Aqueous Corrosion Resistance
Physical Properties
Typical Short-Term Mechanical Properties
Elevated Temperature Oxidation Resistance
Heat Treatment
Fabrication Characteristics
Application
Welding
Other Forms of Degradation
310 Stainless Steel Tube | 310 Stainless Steel Pipe
304 | 304L | 304H| 316/316L| 316Ti| 317L| 321/321H | 309S | 310S | 347/347H| S32205/S31803| S32750| 904L
Physical Properties of 310S/310H Alloys in the Annealed Condition
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Tensile Strength |
Yield Strength |
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| Alloy |
UNS Designation |
Spec. |
psi |
MPa |
ksi |
psi |
MPa |
ksi |
Elongation in 2 inches (min.) % |
Grain Size Req. |
Maximum Hardness |
Modulus of Elasticity (x106 psi) |
Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6) |
Thermal Conductivity(BTU-in/ft2-h-°F) |
| 310S |
S31008 |
A249, A312 |
75,000 |
515 |
75 |
30,000 |
205 |
30 |
35 |
— |
90 Rb |
29.0 |
9.2 |
116 |
| 310H |
S31009 |
A249, A312 |
75,000 |
515 |
75 |
30,000 |
205 |
30 |
35 |
6 or coarser |
90 Rb |
29.0 |
9.2 |
116 |
| Grade |
310S |
310H |
| UNS Designation |
S31008 |
S31009 |
| Carbon (C) Max. |
0.08 |
0.04– 0.10 |
| Manganese (Mn) Max. |
2.00 |
2.00 |
| Phosphorous (P) Max. |
0.045 |
0.045 |
| Sulphur (S) Max. |
0.030 |
0.030 |
| Silicon (Si) Max. |
1.00 |
1.00 |
| Chromium (Cr) |
24.0–26.0 |
24.0–26.0 |
| Nickel (Ni) |
19.0–22.0 |
19.0–22.0 |
| Molybdenum (Mo) |
— |
— |
| Nitrogen (N) |
— |
— |
| Iron (Fe) |
Bal. |
Bal. |
| Other Elements |
— |
— |
310S/310H Product Range
| Alloy |
UNS Designation |
Werkstoff NR. |
Specifications* |
| 310S |
S31008 |
1.4845 |
A/SA249, A/SA312 |
| 310H |
S31009 |
— |
A/SA249, A/SA312 |
*Note: The specifications noted including ASTM, ASME, or other applicable authorities are correct at the time of publication. Other specifications may apply for use of these materials in different applications.
Principal Design Features The strength of this alloy is a combination of good strength and corrosion resistance in temperatures up to 2100oF (1149oC). Due to its relatively high chromium and nickel content it is superior in most environments to 304 or 309 stainless.
Applications Oven linings, boiler baffles, kilns, lead pots, radiant tubes, annealing covers, saggers, burners, combustion tubes, refractory anchor bolts, fire box sheets, furnace components and other high temperature containers.
Machinability This alloy machines similarly to type 304 stainless. Its chips are stringy and it will work harden rapidly. It is necessary to keep the tool cutting at all times and use chip breakers.
Welding Most of the austenitic stainless steels can be readily welded using fusion or resistance methods. Oxyacetylene welding is not recommended. Filler metal should be AWS E/ER 310.
Hot Working Most common hot work methods can be successfully performed after uniform heating to 2150 F (1177 C). Do not forge below 1800 F (982 C). Rapid cooling is required to maximize corrosion resistance.
Cold Working Although this alloy has a high work hardening rate, it can be drawn, headed, upset, and stamped. Full annealing is required after cold work to remove internal stress.
Annealing 1900-2050 F (1038-1121 C) water quench.
Principal Design Features The strength of this alloy is a combination of good strength and corrosion resistance in temperatures up to 2100 F (1149 C). Due to its relatively high chromium and nickel content it is superior in most environments to 304 or 309 stainless.
Hardening This alloy does not respond to heat treatment. Cold work will cause an increase in both hardness and strength.