Physical Properties of 310S/310H Alloys in the Annealed Condition at -20°F to +100°F

			Tensile Strength			Yield Strength
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.