ASTM A335 Seamless Alloy Steel Pipe
ASTM A335 seamless alloy steel pipes are widely used in various industrial applications due to their exceptional mechanical properties and ability to withstand high temperatures and pressures. These pipes are particularly valued for their durability, strength, and resistance to corrosion, making them ideal for demanding environments. Below is a detailed overview of ASTM A335 seamless alloy steel pipes.
Chemical Composition
Grade |
C |
Mn |
P |
S |
Si |
Mo |
P1 |
0.10-0.20 |
0.30-0.80 |
0.025 |
0.025 |
0.10-0.50 |
0.44-0.65 |
P2 |
0.10-0.20 |
0.30-0.61 |
0.025 |
0.025 |
0.10-0.30 |
0.44-0.65 |
P5 |
0.15max |
0.30-0.60 |
0.025 |
0.025 |
0.50max |
0.45-0.65 |
P5B |
0.15max |
0.30-0.60 |
0.025 |
0.025 |
1.00-2.00 |
0.45-0.65 |
P5C |
0.12max |
0.30-0.60 |
0.025 |
0.025 |
0.50max |
0.45-0.65 |
P9 |
0.15max |
0.30-0.60 |
0.025 |
0.025 |
0.25-1.00 |
0.90-1.10 |
P11 |
0.05-0.15 |
0.30-0.60 |
0.025 |
0.025 |
0.50-1.00 |
0.44-0.65 |
P12 |
0.05-0.15 |
0.30-0.61 |
0.025 |
0.025 |
0.50max |
0.44-0.65 |
P15 |
0.05-0.15 |
0.30-0.60 |
0.025 |
0.025 |
1.15-1.65 |
0.44-0.65 |
P21 |
0.05-0.15 |
0.30-0.60 |
0.025 |
0.025 |
0.50max |
0.80-1.06 |
P22 |
0.05-0.15 |
0.30-0.60 |
0.025 |
0.025 |
0.50max |
0.87-1.13 |
P23 |
0.04-0.10 |
0.10-0.60 |
0.030max |
0.010max |
0.50max |
0.05-1.30 |
Mechanical Properties
Mechanical properties |
P1, P2 |
P12 |
P23 |
P91 |
P92, P11 |
P122 |
Tensile strength (MPa) |
380 |
415 |
510 |
585 |
620 |
620 |
Yield strength (MPa) |
205 |
220 |
400 |
415 |
440 |
400 |
Applications
ASTM A335 seamless alloy steel pipes are widely used in various industries where performance under extreme conditions is essential. Their ability to handle high temperatures and pressures makes them suitable for critical applications such as:
Power Generation: Commonly used in boiler systems, superheaters, and reheaters in power plants.
Petrochemical Industry: Employed in refineries and chemical processing units for high-temperature and high-pressure environments.
Oil and Gas Sector: Ideal for transporting crude oil and natural gas through pipelines that require long-term reliability and structural integrity.
Industrial Machinery: Used in the production of heavy machinery that operates under high stress and thermal loads.
These pipes are also often specified in projects where safety, efficiency, and long-term performance are crucial. Whether in power generation or chemical processing, ASTM A335 seamless alloy steel pipes offer a reliable solution for challenging industrial applications.
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