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316 Stainless Steel

316 stainless steel is an austenitic alloy, renowned for its outstanding corrosion resistance, high tensile strength, and enhanced performance in chloride-rich environments, due to its chromium, nickel, and molybdenum content. As a versatile material, Solitaire Steel & Engineering LLP, located in Khetwadi, Mumbai, India, provides 316 stainless steel in sheets, plates, tubes, pipes, bars, angles, channels, beams, and fittings, catering to diverse industries such as marine, chemical processing, and pharmaceuticals.

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Chemical Composition of 316 Stainless Steel

Element Content (%)
Iron (Fe) Balance
Chromium (Cr) 16.0 – 18.5
Nickel (Ni) 10.0 – 14.0
Molybdenum (Mo) 2.0 – 3.0
Manganese (Mn) ≤ 2.0
Silicon (Si) ≤ 0.75
Carbon (C) ≤ 0.08
Phosphorus (P) ≤ 0.045
Sulfur (S) ≤ 0.03
Nitrogen (N) ≤ 0.10

Technical Specifications of 316 Stainless Steel

Physical Properties

Property Metric Imperial
Density 8.0 g/cm³ 0.29 lb/in³
Modulus of Elasticity 193 GPa 28,000 ksi
Thermal Expansion 15.9 µm/m°C 8.8 µin/in°F
Melting Point 1371 – 1399 °C 2500 – 2550 °F

Mechanical Properties

Property Metric Imperial
Tensile Strength 515 MPa 75,000 psi
Yield Strength 205 MPa 30,000 psi
Elongation at Break 40% 40%
Hardness (Rockwell B) ≤ 95 HRB ≤ 95 HRB

Electrical Properties

Property Metric Imperial
Electrical Resistivity 0.75 µΩ·m 29.5 µΩ·in

Thermal Properties

Property Metric Imperial
Thermal Conductivity (100°C) 16.3 W/m·K 9.4 BTU/hr·ft·°F
Specific Heat Capacity 0.5 J/g·K 0.12 BTU/lb·°F
Coefficient of Thermal Expansion 15.9 µm/m°C 8.8 µin/in·°F

316 Stainless Steel Product Specifications by Solitaire Steel & Engineering LLP

Product Type Standards Sizes Types Applications
Sheets & Plates ASTM A240, ASME SA240 Thickness: 0.5mm – 150mm, Width: up to 2000mm Hot Rolled, Cold Rolled Marine equipment, chemical tanks
Pipes & Tubes ASTM A312, ASTM A269 Diameter: 6mm – 1200mm Seamless, Welded Marine, food processing
Bars ASTM A276, ASTM A479 Diameter: up to 100mm Round, Square, Hex Valves, fasteners
Angles, Channels, Beams ASTM A484, EN 10088-3 Custom sizes available L-Angles, U-Channels, I-Beams Structural, architectural
Fittings ASTM A403 Size: 1/2″ – 72″ Buttweld, Socket Weld Chemical processing, piping systems

Processing and Fabrication Properties of 316 Stainless Steel

  • Forming: Highly formable with cold and hot forming capabilities.
  • Welding: Excellent weldability using standard fusion methods, ideal for environments that do not require post-weld annealing.
  • Cold Working: Readily work-hardened; cold working enhances its strength without heat treatment.
  • Heat Treatment: Non-hardenable by heat treatment. Solution annealing is achievable at 1010–1120°C.
  • Machining: Improved machinability, especially in “Ugima” enhanced machining-grade variants, recommended for high-speed operations.

Applications of 316 Stainless Steel

Due to its resilience in corrosive environments and high strength, 316 stainless steel is frequently used in:

  • Marine Applications: Fittings, boat hardware, underwater equipment
  • Chemical Processing: Storage tanks, piping systems, pumps
  • Food and Pharmaceutical Equipment: Process piping, containers, and heat exchangers
  • Architectural Projects: Railings, exterior panels, and trims

316 Stainless Steel vs. 304 Stainless Steel

While 316 and 304 are both austenitic stainless steels, 316 offers better resistance to chlorides and acids due to its molybdenum content, making it more suitable for marine and chemical processing environments. For high-stress applications requiring enhanced pitting resistance, 316 is the preferred choice over 304.