ASTM A335 Seamless Alloy Steel Pipe
ASTM A335 alloy steel pipes are made from materials that contain alloying elements such as chromium, molybdenum, and occasionally vanadium.
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ASTM A335 Seamless Ferritic Alloy Steel Pipe Description
ASTM A335 covers seamless ferritic alloy-steel pipes intended for high-temperature service. The pipes are commonly used in industries such as power generation, petrochemicals, and refineries, where elevated temperatures and pressures are encountered.
The pipes are made from alloyed steel, typically containing elements such as chromium, molybdenum, and occasionally vanadium. These alloying elements enhance the high-temperature properties, strength, and corrosion resistance of the pipes.
Grades: ASTM A335 includes several different grades, each with specific chemical compositions and mechanical properties tailored to different applications. Some common grades include:
Grade P5: Chromium-Molybdenum steel
Grade P9: Chromium-Molybdenum steel with additional elements
Grade P11: Chromium-Molybdenum steel
Grade P22: Chromium-Molybdenum steel with enhanced creep resistance
Grade P91: High-temperature Chromium-Molybdenum steel with superior creep resistance
Product Properties
Specification
| Standard: ASTM A335 | Alloy Or Not: Alloy |
| Grade Group: P5,P9,P11,P22,P91, P92 Etc. | Application: Boiler Pipe |
| Thickness: 1 - 100 Mm | Surface Treatment: As Customer's Requirement |
| Outer Diameter(Round): 10 - 1000 Mm | Technique: Hot Rolled/ Cold Drawn |
| Length: Fixed Length Or Random Length | Heat Treatment: Annealing/Normalizing/Tempering |
| Section Shape: Round | Special Pipe: Thick Wall Pipe |
| Place Of Origin: China | Usage: High Pressure Steam Pipe, Boiler And Heat Exchanger |
| Certification: ISO9001:2008 | Test: ET/UT |
Mechanical Property
| Mechanical Properties | P1,P2 | P12 | P23 | P91 | P92,P11 | P122 |
| Tensile Strength | 380 | 415 | 510 | 585 | 620 | 620 |
| Yield Strength | 205 | 220 | 400 | 415 | 440 | 400 |
A335 seamless pipe advantages:
- International standard certification
ASTM A335 standard seamless steel pipe, covering mainstream grades such as P5/P22/P91, complies with global general specifications such as ASME and EN, and supports access certification for target markets such as Europe, the United States, the Middle East, and Southeast Asia.
- High temperature and high pressure performance
Working temperature 450°C～650°C (P5 temperature resistance up to 600°C), high pressure bearing ≥9.8MPa, high temperature creep strength is more than 30% better than ordinary alloy steel.
- Corrosion resistance
Chromium-molybdenum alloy components (such as P5 containing Cr 9-11%, Mo 0.45-0.65%) form a dense oxide layer to resist sulfur-containing oil and gas corrosion, extending the equipment life to more than 15 years.
Application of A335 alloy pipe:
- Electric power energy: supercritical boiler pipelines (main steam pipes, superheaters) in thermal power plants
- Petrochemical industry: reactor pipelines of cracking units in refineries, import and export pipelines of hydrogenation reactors
- Heavy equipment: nuclear power secondary circuit pipelines, ship boiler systems.
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