Stainless Steel Grade 310H (UNS S31009)

Topics Covered

Chemical Composition
Mechanical Properties


Stainless steel grade 310H has carbon content and is a preferred 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.

The following datasheet provides an overview of stainless steel grade 310H.

Chemical Composition

The chemical composition of grade 310H stainless steel is outlined in the following table.

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

The mechanical properties of annealed grade 310H stainless steel are displayed in the following table.

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


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

The following are the specific areas of applications:

  • 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.

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