Product Parameters
ASTM A355 Large Diameter Seamless Steel Pipe
overview
ASTM A355 is a standard specification for seamless steel pipes for high-temperature applications. It is an alloy material containing alloy elements such as Cr, Ni, and Mo, which can improve the high temperature and high-pressure resistance, corrosion resistance, and mechanical properties of steel pipes. It can be widely used in complex pipeline environments with high temperatures and high pressure.
Key Features
High-temperature resistance, suitable for bending and flanging
Chemical Composition
| Element | Composition (%) |
| Carbon (C) | 0.05-0.15 |
| Manganese (Mn) | 0.30-0.60 |
| Phosphorus (P) | 0.025 (max) |
| Sulfur (S) | 0.025 (max) |
| Silicon (Si) | 0.10-0.50 |
Mechanical Properties
| Property | Value |
| Tensile Strength | 415 MPa (min) |
| Yield Strength | 240 MPa (min) |
| Elongation | 30% (min) |
| Hardness | 89 HRB (max) |
Physical Properties
| Property | Value |
| Density | 7.85 g/cm³ |
| Melting Point | 1420-1460°C |
| Thermal Conductivity | 50.2 W/m·K |
| Specific Heat Capacity | 0.473 J/g·K |
Process Performance
| Property | Value |
| Weldability | Excellent |
| Machinability | Fair |
| Formability | Good |
| Corrosion Resistance | Moderate |
Steel Grade
ASTM A355 typically includes several steel grades, such as P5, P11, P12, P22, P91, etc. These grades vary in their chemical composition and mechanical properties to suit different applications.
Application
The ASTM A355 seamless steel pipe finds its application in various industries where high-temperature and pressure resistance are required. Some common applications include:
Power generation
Petrochemical
Oil and gas
Refinery
Boiler and heat exchanger
Possible Alternative Grades
While ASTM A355 offers a range of steel grades suitable for high-temperature service, there are alternative grades available in the market based on specific requirements. Some possible alternatives include:
ASTM A106 Grade C
ASTM A335 P22
ASTM A333 Grade 8
These alternative grades may offer slightly different properties and may be chosen based on factors such as cost, availability, and specific application requirements.
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