| Standard: | ASTM A335 | Length: | Single Random， Double Random & Cut Length. |
|---|---|---|---|
| Surface: | Black/Vanish | OD: | 1/2′ TO 24 ‘ |
| END TYPE: | PLAIN/BEVELED | Size Standard: | ASTM B16.10 & B16.19 & Customized |
ASTM A335 P9 Alloy Steel Seamless Tube Black Painting Beveled End
ASTM A335 P9/1Cr9Mo Chromium Molybdenum Alloy High Pressure Boiler Pipe Heat Resistant Steel A335P11， P22， P91， T91， 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".
| Alloy steel/tube | |
| PIPES & TUBES | ASTM A335， ASTM A213， ASTM A691 |
| PIPES FITTINGS | ASTM A234 |
| FITTINGS & FLANGES | ASTM A182 |
| GRADES | P1/P5/P9/P11/P12/P22/P91 & T5/T9/T11/T22/T91 |
| FORM (PIPES) | SEAMLESS / E.R.W / EFSW |
TONG CHUANG Special Steel is Exporters & Supplier of alloy steel， alloy steel pipe gr p5， alloy steel pipe gr p11， alloy steel pipe gr p9， alloy steel pipe gr p22， alloy steel pipe gr p91， ASTM A335， ASTM A213， ASTM A691. | |
| Available Shapes | |
Tubes & Pipes (SEAMLESS ) up to 30". Tubes & Pipes (ERW ) up to 60". Sheets / plates up to 150 MM. Rod / Bar up to 350 MM. Circle up to 1000 & Above as per your requirements. thickness up to 200 MM & Above as per requirements. | |
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
Chemical composition(%):
| Grade | C | Mn | P≤ | S≤ | Si | Cr | Mo |
| P11 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50-1.00 | 1.00-1.50 | 0.44-0.65 |
| P22 | 0.05-0.16 | 0.30-0.60 | 0.025 | 0.025 | ≤0.50 | 1.90-2.60 | 0.87-1.13 |
| P5 | ≤0.15 | 0.30-0.60 | 0.025 | 0.025 | ≤0.50 | 4.00-6.00 | 0.45-0.65 |
| P9 | ≤0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.25-1.00 | 8.00-10.00 | 0.90-1.10 |
| P91 | 0.08-0.12 | 0.30-0.60 | 0.020/0.010 | 0.020/0.010 | 0.02-0.50 | 8.00-9.50 | 0.85-1.05 |
| P92 | 0.07-0.13 | 0.30-0.60 | 0.020/0.010 | 0.020/0.010 | ≤0.50 | 8.50-9.50 | 0.30-0.60 |
Mechanical properties:
| Grade | Tensile strength | Yield strength | Elongation |
| P11， P22， P5， P9 | ≥415 | ≥205 | ≥30/20 |
| P91 | ≥585 | ≥415 | ≥20 |
| P92 | ≥620 | ≥440 | ≥20 |
Application:
- Boiler
- Economizer
- Superheater
- Reheater
- Petrochemical industry
