Physical Properties of 310S/310H Alloys in the Annealed Condition at -20°F to +100°F
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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 (x106psi) |
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 |
Composition of 310S/310H tubing and pipe
| 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.
