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Stainless Steel - Grade 310S (UNS S31008, DIN 1.4845)

Description

Stainless steel 310S (UNS S31008, DIN 1.4845) is an austenitic chromium-nickel alloy with excellent resistance to oxidation and scaling at high temperatures up to 1150°C (2100°F). It has a low carbon content for improved weldability and formability compared to standard 310 grade.

Chemical Composition

Element Composition
Chromium (Cr) 24.0 - 26.0
Nickel (Ni) 19.0 - 22.0
Carbon (C) ≤ 0.08
Silicon (Si) ≤ 1.50
Manganese (Mn) ≤ 2.00
Phosphorus (P) ≤ 0.045
Sulfur (S) ≤ 0.030
Iron (Fe) Balance

Mechanical Properties (Annealed)

Property Value
Tensile Strength (MPa) ≥ 515
0.2% Proof Strength (MPa) ≥ 205
Elongation (%) ≥ 40
Hardness (HB) ≤ 217

Thermal & Physical Properties

  • Excellent oxidation resistance up to 1150°C (2100°F)
  • High creep strength at elevated temperatures
  • Resistant to spalling and thermal cycling
  • Good sulfidation resistance
  • Non-magnetic in annealed and cold worked conditions

    • Other Designations

  • ASTM: A240, A276, A312
  • UNS: S31008
  • DIN: 1.4845
  • JIS: SUS310S
  • GB: 06Cr25Ni20

    • Fabrication and Heat Treatment

  • Can be readily fabricated by standard commercial procedures
  • Welding processes: TIG, MIG, arc welding, laser beam welding
  • Solution annealing temperature: 1030-1180°C (1886-2156°F)

    • Applications

  • Heat treatment equipment (furnace parts, conveyor belts, rollers, oven linings)
  • Chemical processing equipment (vessels, piping, valves)
  • Food processing equipment
  • Aerospace and cryogenic applications
  • Power generation (boilers, turbines, nuclear plants)

    • Supplied Forms

  • Bars
  • Wires
  • Weld wire (AWS E310-16 or ER310)

    • Features

  • Excellent oxidation resistance at high temperatures
  • Good corrosion resistance
  • Resistant to scaling and spalling
  • Suitable for moderately carburizing atmospheres
  • Improved weldability and formability compared to 310/1.4845 grade
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