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Astm A335 P12
Material and Specification
ASTM A335 P12 is a standard specification for seamless ferritic alloy steel pipe intended for high-temperature service. It is commonly used in various industrial applications where elevated temperatures and pressures are present. The material is well-suited for applications in power plants, refineries, and petrochemical industries.
Chemical Composition
| Element | Minimum (%) | Maximum (%) |
| Carbon (C) | 0.05 | 0.15 |
| Manganese (Mn) | 0.30 | 0.61 |
| Phosphorus (P) | - | 0.025 |
| Sulfur (S) | - | 0.025 |
| Silicon (Si) | 0.50 | 1.00 |
| Chromium (Cr) | 0.80 | 1.25 |
| Molybdenum (Mo) | 0.44 | 0.65 |
Mechanical Properties
The mechanical properties of ASTM A335 vary depending on the heat treatment and manufacturing processes. Here are the typical properties:
| Property | Value |
| Tensile Strength | 415 MPa (min) |
| Yield Strength | 220 MPa (min) |
| Elongation (%) | 30 (min) |
| Hardness (HB) | 163-255 |
Steel Grade
ASTM A335 is classified as a ferritic alloy steel with the designation "P" indicating a high-temperature service pipe. The "12" refers to the nominal chromium content in the steel.
Application
ASTM A335 pipes are widely used in various high-temperature applications due to their excellent resistance to oxidation and high thermal stability. Some common applications include:
- Power Generation: P12 pipes are used in power plants for superheater and reheater tubing, as well as in heat exchangers.
- Refineries: They are employed in refineries for processing high-temperature fluids and gases.
- Petrochemical Industries: P12 pipes are utilized in petrochemical plants for transporting high-temperature chemicals and hydrocarbons.
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