ASME SA335 P9 Alloy Steel Seamless Pipe Black Painting Beveled End

ASME SA335 P9 Chromium Molybdenum Alloy High Pressure Boiler Pipe Heat Resistant Steel A335 P11, P22, P91, T91 Seamless Pipe, Round Rod, Plate, A335 P9 is a high-temperature chromium molybdenum alloy heat-resistant steel produced using American standards. Due to its excellent oxidation resistance, high temperature strength, and sulfide corrosion resistance, it is widely used in high-temperature, high-pressure, flammable, and explosive pipelines in petroleum refining and chemical equipment, especially in direct heating pipes of heating furnaces. The medium temperature can reach 550~600 ℃. The approximate steel grade in China is made of 1Cr9Mo material, and the 1Cr9Mo alloy pipe complies with GB 9948-2006 "Standard for Seamless Steel Pipe for Petroleum Cracking".

ASME SA335 Alloy Steel Seamless Pipe Manufacturing process

1. Hot rolling (extruded seamless steel pipe): round tube billet → heating → perforation → three-roll skew rolling, continuous rolling or extrusion → Stripping → sizing (or reducing) → cooling → straightening → hydraulic test (or detection) → marking → storage

2. Cold-drawn (rolled seamless steel pipe): round tube blank → heating → perforation → heading → annealing → pickling → oiling (copper plating) → multi-pass cold drawing (cold rolling) → billet → Heat treatment → straightening → hydraulic test (inspection) → marking → storage

ASME SA335 Alloy Steel Pipe Chemical composition(%)

ASME SA335 Alloy Steel Pipes Mechanical properties

ASME SA335 Alloy Steel Pipe Application

• Boiler
• Economizer
• Superheater
• Reheater
• Petrochemical industry