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SS 309S stainless steel Wire
SS 309H stainless steel Wire
stainless steel Wire
309S stainless steel Wire

SS 309S / SS 309H Wire

Alloys 309 and 309S are austenitic chromium-nickel stainless steels that are often used for higher temperature applications. Owing to their high chromium and nickel content, Alloys 309 and 309S are highly corrosion resistant, have exceptional resistance to oxidation, and great heat resistance while offering good strength at room and elevated temperatures. The only significant difference between 309 and 309S is the carbon content, Alloy 309S has a much less carbon composition which minimizes carbide precipitation and improves weldability.
Product information
SS 309S stainless steel is a highly alloyed austenitic stainless steel utilized for its outstanding oxidation resistance, high-temperature, strength, and creep resistance. The lower nickel content of Stainless Steel 309, compared to Stainless Steel 310, increases its resistance to hydrogen sulfide (H2S) attack at high temperatures. It is tough and ductile and can be readily fabricated and machined. SS 309S is the low-carbon version, and is recommended for, uses where sensitization and subsequent corrosion by high temperature condensates during shutdown may pose a challenge. Stainless Steel 309S is used for its high-temperature oxidation resistance and resistance to H2S attack. 309S Stainless Steels can be roll formed, stamped and drawn readily. In-process annealing is usually needed to increase ductility and reduce hardness.

Technical data
Chemical Composition
Grade C Si P S Cr Mn Ni Fe
309 0.20 max 1.0 max 0.045 max 0.030 max 22.0 - 24.0 2.0 max 12.0 - 15.0 Remainder
309S 0.08 max 1.0 max 0.045 max 0.030 max 22.0 - 24.0 2.0 max 12.0 - 15.0 Remainder

Mechanical Properties
Grade Tensile Strength (ksi) 0.2% Yield Strength (ksi) Elongation% in 2 inches
309 75 30 40
309S 70 25 40

Physical Properties
  309 309S Temperature in °C
Density 7.9 g/cm³ 8.03 g/cm³ Room
Specific Heat 0.12 Kcal/kg.C 0.12 Kcal/kg.C 22°
Melting Range 1399 - 1454 °C 1399 - 1454 °C -
Modulus of Elasticity 200 KN/mm² 200 KN/mm² 22°
Electrical Resistivity 78 µΩ.cm 78 µΩ.cm Room
Coefficient of Expansion 14.9 µm/m °C 14.9 µm/m °C 20 - 100°
Thermal Conductivity 15.6 W/m -°K 15.6 W/m -°K 20°








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