A139 GrB Sprial Welded Steel Pipe

A139 GrB Sprial Welded Steel Pipe A139 Sprial Welded Steel Pipe is one kind of steel tube has five grades, GrB is one grade of it. It is made by rolling low-carbon carbon structural steel or low-alloy structural steel strip according to a certain spiral angle (called forming angle) into a tube blank, and then welding the tube seam together. It can be made with a narrower Strip steel produces large diameter steel pipes. Product advantange: Durable Reliable Toughness Chemical content: C Mn P S 0.26 max 1.0 max 0.035 max 0.035 max Mechanical properties: Tensile Strength, min, ksi [MPa]    Yield Strength, min, ksi [MPa]    Elongation in 2 in. [50 mm] % 60 (415) 35 (240) 25   Cooperative partner: