ASTM A249 347 seanless tube
It is rolled into strip steel after process treatment. Generally, the strip steel is unpacked, flattened, crimped, and welded to form a round tube, then the round tube is rolled into a square tube and then cut to the required length. Usually 50 pieces per pack.
Square pipes are divided into seamless and welded seams. Seamless square pipes are formed by extruding seamless round pipes.
Grade 347 Stainless Steel Welded Tubeis a high tensile and stable stainless steel that offers exceptional resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 800 to 1650 F. ASTM A249 Stainless Steel 347 Welded Tube offers good mechanical properties with higher creep and stress rupture characteristics than other grades, such as 304.Also referred as WNR 1.4550 Welded Tube .