S. S. 310 / 310S

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UNS - S31000 / S31008

Stainless steel 310 is an austenitic heat resistant alloy with phenomenal resistance to oxidation under mildly cyclic conditions through 2000ºF. Its nickel and high chromium contents provide similar corrosion resistance, superior resistance to oxidation and the retention of a larger fraction of room temperature strength than the common austenitic alloys like Type 304.

Stainless 310 is frequently utilized at cryogenic temperatures, with excellent toughness to -450°F.temperatures, with excellent toughness to -450°F, and low magnetic permeability.

Stainless steel 310S is austenitic chromium, nickel stainless steel (.08% max carbon) with good oxidation resistance and strength at high temperatures. It resist oxidation in continuous service up to 2000ºF gave decreasing sulphur gasses are not present. It is additionally utilized for intermittent service at temperatures up to 1900°F due to it resists rescaling and has a low coefficient of expansion. This factor reduces the tendency of the steel to warp in heat service. 310s are same as 310 aside from lower carbon content to minimize carbide precipitation during welding.

  • Oxidation resistance to 2000°F
  • Moderate strength at high temperature
  • Resistance to hot corrosion
  • Strength and toughness at cryogenic temperatures

  • Kilns
  • Heat Exchangers
  • Radiant Tubes
  • Muffles, retorts, annealing covers
  • Tube hangers for petroleum refiing adn steam boilers
  • Coal gasifier internal components
  • Saggers
  • Furnace parts, conveyor belts, rollers, oven linings, fans
  • Food processing equipment
  • Cryogenic structures


Type 310/310S is promptly fabricated by a standard commercial process. In comparison to carbon steel, stainless steels are tougher and tend to work harden quickly. By using all of the common welding processes type 310/310S can be easily welded.


This alloy machines same as type 304 stainless steel. The chips of this alloy are stringy and it will work harden very quickly. It is compulsory to keep the tool cutting at all times and utilize chip breakers.


By using fusion or resistance technique most of the austenitic stainless steels can be quickly welded. Oxyacetylene welding is not recommended. Filler metal should be AWS E/ER 310.

Hot Working

After uniform heating to 2150 F (1177 C) most common hot work techniques can be successfully performed. Do not forge down 1800 F (982 C). Fast cooling is required to maximize corrosion resistance.

Cold Working

In spite of the fact that this alloy has a high work hardening rate, this alloy can be drawn, headed, upset and stamped. To remove internal stress full annealing is required after cold work.


1900-2050 F (1038-1121 C) water quench.


This alloy doesn’t reply to heat treatment. Cold work will cause an increase in both hardness and strength.

Chemical Composition %

GradeCSiPS CrMnNiFe
310 0.025 max1.50 max0.045 max0.03 max24.0 - 26.0 2.0 max19.0-22.0Remainder
310S 0.08 max1.50 max0.045 max0.03 max24.0 - 26.02.0 max19.0-22.0Remainder

Mechanical Properties

Tensile Strength (ksi)0.2% Yield Strength (ksi)Elongation% in 2 inches

Physical Properties

310310STemperature in °C
Density8.0 g/cm³9.01 g/cm³Room
Specific Heat0.12 Kcal/kg.C0.12 Kcal/kg.C22°
Melting Range1400 - 1455 °C1399 - 1454 °C-
Modulus of Elasticity 193 - 200 KN/mm²200 KN/mm²22°
Electrical Resistivity77 µΩ.cm94 µΩ.cmRoom
Coefficient of Expansion15.8 µm/m °C14.4 µm/m °C20 - 100°
Thermal Conductivity16.2 W/m -°K13.8 W/m -°K20°

ASTM Specifications

Pipe / Tube (SMLS)Sheet / PlateBarForgingFitting
A 213, A 249A 167, A 240A 276 A 182A 403


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