310H STAINLESS STEEL

Alloy 310H (UNS S31009) has a carbon content restricted to exclude the lower end of the 310 range. This makes 310H the grade of choice for high temperature applications. This steel has good resistance to oxidation at temperatures of up to 1040°C (1904°F) in intermittent service and 1150°C (2102°F) in continuous service. It is widely used in environments where sulfur dioxide gas is present at high temperatures; however it is recommended that this steel should not be continuously used at 425-860°C (797-1580°F) range due to carbide precipitation.

APPLICATIONS

Grade 310H stainless steel is chiefly used in the heat treatment industry, and the chemical process industry.

• Fans

• Trays

• Baskets

• Rollers

• Burner parts

• Oven linings

• Tube hangers

• Retorts linings

• Conveyor belts

• Refractory supports

• Containers for hot concentrated acids, ammonia, and sulfur dioxide

• Used along with hot acetic and citric acid in the food processing industry.

Chemical Composition

Element	Content (%)
Iron, Fe	49.075-45.865
Chromium, Cr	24-26
Nickel, Ni	19-22
Manganese, Mn	2
Silicon, Si	0.75
Phosphorous, P	0.045
Carbon, C	0.040-0.10
Sulfur, S	0.03

Mechanical Properties

Properties	Metric	Imperial
Tensile strength	515 MPa	74694 psi
Yield strength	205 MPa	29732 psi
Modulus of elasticity	200 GPa	29000 ksi
Shear modulus	77.0 GPa	11200 ksi
Poissons ratio	0.3	0.3
Elongation at break (in 50 mm)	40%	40%
Hardness, Rockwell B	95	95
Hardness, Brinell	217	217

Physical Properties

Quantity	Value	Unit
Thermal expansion	16 – 17	e-6/K
Thermal conductivity	16 – 16	W/m.K
Specific heat	500 – 500	J/kg.K
Melting temperature	1370 – 1400	°C
Service temperature	0 – 500	°C
Density	8000 – 8000	kg/m3
Resistivity	0.7 – 0.7	Ohm.mm2/m

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