Alloy Steel Seamless Pipes & Tubes
USA Piping Solution provides a comprehensive resource for Alloy Steel Seamless Pipes & Tubes. This product category primarily covers materials manufactured under the ASTM A335 specification, officially designated as Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service. These A335 Chrome Moly Pipes are essential components in power generation, petrochemical plants, refineries, and other industries where piping systems are exposed to extreme heat and pressure. The addition of Chromium (Cr) enhances high-temperature strength and oxidation resistance, while Molybdenum (Mo) boosts creep resistance and tensile strength.
Alloy Steel Seamless Pipes & Tubes List
ASTM A213 T1 Tubes
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ASTM A213 T2 Tubes
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ASTM A213 T5 Tubes
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ASTM A213 T9 Tubes
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ASTM A213 T11 Tubes
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ASTM A213 T22 Tubes
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ASTM A213 T23 Tubes
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ASTM A213 T91 Tubes
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ASTM A335 P1 pipes
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ASTM A335 P2 pipes
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ASTM A335 P5 pipes
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ASTM A335 P9 pipes
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ASTM A335 P11 pipes
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ASTM A335 P22 pipes
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ASTM A335 P91 pipes
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ASTM A423 Grade 1 Tubes
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ASTM A847 Tubes
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AISI 4130 Tubes & Pipes
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AISI 4140 Tubes & Pipes
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AISI 1020 Tubes & Pipes
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ASTM A335 Seamless Alloy Steel Grades Comparison
To help you select the precise material for your high-temperature application, the table below compares the core chemical composition (Chromium and Molybdenum) that differentiates our most popular ASTM A335 Alloy Steel Seamless Pipes. Note that generally, the higher the Cr/Mo content, the greater the pipe's resistance to oxidation and creep deformation at elevated temperatures.
| ASTM/ASME Grade | Material Name | Chromium (Cr) (%) | Molybdenum (Mo) (%) | Primary Application |
|---|---|---|---|---|
| P1 | Carbon Moly | 0.50 max | 0.44−0.65 | Moderate temperature steam lines |
| P2 | 1/2Cr Mo | 0.50−0.81 | 0.44−0.65 | General high-temperature service |
| P5 | 5Cr Mo | 4.00−6.00 | 0.45−0.65 | Oil refinery heaters; Sulfidic corrosion resistance |
| P9 | 9Cr Mo | 8.00−10.00 | 0.90−1.10 | High-temperature, high-pressure service; greater corrosion resistance |
| P11 | 1.25Cr Mo | 1.00−1.50 | 0.44−0.65 | Boiler tubes and superheater tubes |
| P22 | 2.25Cr Mo | 1.90−2.60 | 0.87−1.13 | Very high-temperature service in power plants |
| P91 | 9Cr 1Mo V | 8.00−9.50 | 0.85−1.05 | Ultra supercritical power plants; highest creep strength |
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A335 Pipe Specifications
The ASTM A335 specification covers both nominal wall and minimum wall ASTM A335 Seamless Steel Pipe designed specifically for the rigorous demands of the power generation and petrochemical industries. Pipes ordered under this standard are guaranteed to be suitable for various fabrication techniques, including fusion welding, bending, flanging (vanstoning), and similar forming operations. The inclusion of Chromium (Cr) and Molybdenum (Mo) alloying elements ensures the Alloy Steel Seamless Tubes deliver excellent tensile strength and fine resistance to both high temperature and corrosion.
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Application Industries
Boilers
Heat Exchangers
Power Plants
Steam Piping
Refineries
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