ASTM A860 WPHY 70
ASTM A860 WPHY 70 is a specification for high-strength welded pipe fittings. The designation "WPHY 70" refers to the material's yield strength of 70,000 psi (pounds per square inch), making it suitable for use in high-pressure applications.
WPHY 70 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.20 max |
| Manganese (Mn) | 1.00 - 1.45 |
| Phosphorus (P) | 0.030 max |
| Sulfur (S) | 0.010 max |
| Silicon (Si) | 0.15 - 0.40 |
| Nickel (Ni) | 0.50 max |
| Chromium (Cr) | 0.30 max |
| Molybdenum (Mo) | 0.25 max |
| Copper (Cu) | 0.35 max |
| Titanium (Ti) | 0.05 max |
| Vanadium (V) | 0.10 max |
| Columbium (Cb) | 0.04 max |
| Vanadium + Columbium (V+Cb) | 0.12 max |
| Aluminum (Al) | 0.06 max |
WPHY 70 Mechanical Properties
| Property | Minimum Value |
|---|---|
| Yield Strength (ksi) | 70 |
| Tensile Strength (ksi) | 80 |
| Elongation (%) | 18 |
| Reduction of Area (%) | 40 |
| Charpy V-Notch Impact Energy (ft-lb) | 20 @ -20°F |
WPHY 70 Physical Properties
| Property | Value |
|---|---|
| Density (lb/in³) | 0.283 |
| Melting Point (°F) | 2750 |
| Coefficient of Thermal Expansion (in/in/°F) | 6.5 x 10^-6 |
| Modulus of Elasticity (psi) | 29 x 10^6 |
| Thermal Conductivity (Btu-in/ft²-hr-°F) | 25 |
Key features of ASTM A860 WPHY 70:
- Material: The pipe fittings are made from carbon steel, offering excellent strength and durability.
- Yield Strength: 70,000 psi (485 MPa), which is high enough to withstand heavy stress in demanding environments.
- Applications: Commonly used in oil, gas, and petrochemical industries, especially in applications requiring resistance to pressure and harsh conditions.
- End Use: These fittings are primarily used for pipelines that transport gas, oil, and other fluids under high pressure.
Applications:
- Oil and Gas: Piping systems in refineries, pipelines, and offshore platforms.
- Petrochemical: Piping systems in chemical plants and processing facilities.
- Power Generation: Piping systems in power plants, including boilers, turbines, and heat exchangers.
- Other Industries: Construction, mining, and heavy machinery.
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