ASTM A335 Seamless Alloy Steel Pipe
ASTM A335 seamless alloy steel pipes are widely used across various industrial sectors due to their exceptional mechanical properties and ability to perform reliably under high temperatures and pressures. These pipes are known for their durability, strength, and resistance to corrosion, making them ideal for demanding applications. Here is a comprehensive 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 highly valued in industries that require materials capable of withstanding extreme conditions. Their versatility makes them suitable for the following applications:
Power Generation: These pipes are commonly used in power plants for boiler tubes, superheaters, and reheaters where they endure high pressure and temperature.
Petrochemical Industry: They are essential in refineries and chemical processing units for transporting fluids under high-pressure and high-temperature environments.
Oil and Gas Sector: The pipes are used in pipelines and equipment that transport oil and gas, ensuring long-term performance and safety in harsh conditions.
Industrial Manufacturing: They are also employed in heavy machinery and equipment that operate under high stress and thermal loads.
In summary, ASTM A335 seamless alloy steel pipes are a critical component in many industrial systems. Their unique combination of strength, heat resistance, and durability ensures reliable performance in some of the most challenging environments. Whether in energy production or chemical processing, these pipes play a vital role in maintaining operational efficiency and safety.
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