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310 Stainless Steel

310 stainless steel, available from Solitaire Steel & Engineering LLP, Khetwadi, Mumbai, India, is an austenitic stainless steel noted for its high-temperature stability, exceptional oxidation resistance, and moderate strength. Due to its high chromium and nickel contents, it withstands oxidation in temperatures up to 1100°C (2010°F), making it ideal for extreme applications like furnace parts, heat exchangers, and kiln linings.

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Chemical Composition of 310 Stainless Steel

Element Content (%)
Chromium (Cr) 24.0 – 26.0
Nickel (Ni) 19.0 – 22.0
Carbon (C) ≤ 0.25 (310), ≤ 0.08 (310S)
Manganese (Mn) ≤ 2.0
Silicon (Si) ≤ 1.50
Phosphorus (P) ≤ 0.045
Sulfur (S) ≤ 0.03
Iron (Fe) Balance

Technical Specifications of 310 Stainless Steel

Physical Properties

Property Metric Imperial
Density 7.89 g/cm³ 0.285 lb/in³
Modulus of Elasticity 196 GPa 28.5 x 10⁶ psi
Thermal Expansion 15.9 µm/m°C (0-100°C) 8.8 µin/in°F
Melting Point 1354 – 1402 °C 2470 – 2555 °F

Mechanical Properties

Property Metric Imperial
Tensile Strength 520 MPa 75,400 psi
Yield Strength 205 MPa 29,700 psi
Elongation at Break 40% 40%
Hardness (Brinell) ≤ 217 ≤ 217

Electrical Properties

Property Metric Imperial
Electrical Resistivity 78 µΩ·cm (at 20°C) 30.7 µΩ·in (at 68°F)

Thermal Properties

Property Metric Imperial
Thermal Conductivity (at 100°C) 14.2 W/m·K 8.2 BTU/hr·ft·°F
Specific Heat Capacity 500 J/kg·K 0.12 BTU/lb·°F
Coefficient of Thermal Expansion 15.9 µm/m°C (0-100°C) 8.8 µin/in·°F

310 Stainless Steel Product Specifications by Solitaire Steel & Engineering LLP

Product Type Standards Sizes Types Applications
Sheets & Plates ASTM A240, DIN 1.4845 Thickness: 1.5mm – 100mm Hot Rolled, Cold Rolled Kilns, furnaces, high-temperature containers
Pipes & Tubes ASTM A312, A269 Diameter: 6mm – 1200mm Seamless, Welded Heat exchangers, fluidized beds
Bars ASTM A276, A479 Diameter: up to 150mm Round, Square, Hex Construction, petrochemical plants
Angles, Channels, Beams ASTM A484 Custom sizes available L-Angles, U-Channels, I-Beams Structural, architectural, high-temp applications
Fittings ASTM A403 Size: 1/2″ – 72″ Buttweld, Socket Weld Piping systems, cryogenic processing

Processing and Fabrication Properties of 310 Stainless Steel

  • Forming: Easily formed by hot and cold processes; avoid bending if exposed to high temperatures over time.
  • Welding: Compatible with all standard welding methods, including TIG, MIG, and arc welding, often with filler metals to prevent cracking.
  • Machining: Similar to 304 and 316 grades; slow speeds and lubrication reduce work hardening.
  • Heat Treatment: Solution annealing at 1040 – 1065°C followed by rapid cooling.
  • Heat Resistance: Oxidation-resistant in continuous operation up to 1050°C; suited for cyclic operations up to 1100°C.

Applications of 310 Stainless Steel

The strength and oxidation resistance of 310 stainless steel make it versatile across a range of demanding applications:

  • Industrial Furnaces: Kilns, retorts, and furnace components
  • Petrochemical and Refining: Tube hangers, catalytic recovery systems
  • Food Processing Equipment: High-temperature baking, ovens
  • Power Generation: Coal combustors, gasifier internals, boiler components

310 Stainless Steel vs. 310S Stainless Steel

310S, a low-carbon variant of 310, is less susceptible to carbide precipitation, enhancing weldability and high-temperature stability.