SS 347 / SS 347H Pipe & Tubing

Alloy 347 stainless-steel plates in thicknesses from 3/16″ through 4”. A very high carbon version, Alloy 347H stainless-steel plate, may also be ordered in a similar thickness range.
Alloy 347 is stabilized stainless-steel plate that provides as it is major benefit an outstanding resistance to intergranular rust following exposure to temperature in the chromium carbide precipitation range between 800 to 1500°F ( 427 to 816°C ) . Alloy 347 stainless-steel plate is stabilized by the adding of columbium and also tantalum.
Alloy 347 stainless-steel plate can be beneficial for high-temperature services due to its good quality mechanized properties. Alloy 347 stainless-steel plate provides increased creep and also stress rupture properties compared to Alloy 304 and also , especially , Alloy 304L , that could also be being considered for exposures exactly where sensitization and also intergranular corrosion are concerns .


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 and Welded Austenitic Stainless Steel Tubing for General ServiceASTM A 269
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 347 / 347H75 (515) 30 (205)3590 HRB max

Chemical Industry

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.