SS 309S / SS 309H Pipe & Tubing

Alloys 309 and 309S are austenitic chromium-nickel stainless steel steels that will be commonly used for much higher temperature applications. Because of their higher chromium and also nickel content, Alloys 309 and also 309S are high rust resistant, have excellent resistance to oxidation, and also outstanding heat resistance when offering good energy at room and increased temperature ranges. The only major difference between 309 with 309S is the carbon content. Alloy 309S have a very much less carbon components which decreases carbide precipitation and also enhances weldability.

Alloys 309 with 309S are utilized primarily for their high-temperature oxidation resilience, outstanding high temperatures energy, together with their resistance to creep deformation and also environment attack. A few examples include, but are not restricted to:
• Heating components
• Aircraft and also jet engine parts
• Heat exchangers
• Carburizing annealing products
• Sulfite liquor managing machine
• Kiln liners
• Boiler baffles
• Refinery and also chemical processing machines
• Auto exhaust components


Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger TubesASTM A 213
Standard Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser TubesASTM A 249
Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel PipesASTM A 312
Standard Specification for Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service and General ApplicationsASTM A 358
Standard Specification for Welded Large Diameter Austenitic Steel Pipe for Corrosive or High-Temperature ServiceASTM A 409

Mechanical Properties

Tensile Strength : Unit – ksi (MPa) , Minimum
Yeild Strength : 0.2 % Offset , Unit – ksi (MPa) , Minimum
Elongation : in 2″, Unit : % , MinimumValues as per ASTM A 213

Condition & GradeTensile StrengthYeild StrengthElognationHardness
Annealed SS 309S75 (515) 30 (205)3590 HRB max
Annealed SS 309S75 (515) 30 (205)3590 HRB max

Power Generation

Welded Pipe


Stocking & Supplying Seamless & Welded Pipes as small as 1/4″ NB and 6″ NB. Thickness ranging from Sch 10 to Sch 80.

Tube / Tubing

Tubes / Tubing

Stocking & Supplying Seamless & Welded Tubes / Tubing from 6mm OD to 101.6mm OD. Thickness ranging from 0.8mm to 6mm.