ASME/ASTM SA/A 420 WPL6 Butt Weld Tees for Low-Temperature Service in Equal and Reducing Sizes
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Product Description
ASME/ASTM SA/A 420 WPL6 Equal and Reducing Tees
ASTM A420 WPL6 is a designation for piping fittings made from wrought carbon steel and alloy steel specifically designed for low-temperature service applications.
Applications and Usage
A420 WPL6 low-temperature carbon steel is primarily used in:
- Oil & gas, petrochemical, and power plants
- Piping systems operating at design temperatures down to −46 °C (−50 °F)
- Butt-welded fittings (elbows, tees, caps, reducers) compatible with A333 Gr. 6 or A106 piping
This material features controlled chemistry and impact toughness requirements to ensure performance in low-temperature environments.
Typical Chemical Composition
Standard specification limits for ASTM A420 Grade WPL6:
| Element | Composition Range |
|---|---|
| Carbon (C) | max 0.30% |
| Manganese (Mn) | 0.50 – 1.35% |
| Phosphorus (P) | max 0.035% |
| Sulfur (S) | max 0.040% |
| Silicon (Si) | 0.15 – 0.30% |
| Copper (Cu) | max 0.40% (residual) |
| Nickel (Ni) | max 0.40% (residual) |
| Chromium (Cr) | max 0.30% (residual) |
| Molybdenum (Mo) | max 0.12% (residual) |
| Vanadium (V) | max 0.08% (residual) |
Composition Rationale
- Low to medium carbon (≤ 0.30%): Maintains good toughness and weldability while reducing brittle fracture risk at low temperatures
- Moderate manganese (0.50–1.35%): Improves strength and toughness while aiding deoxidation
- Controlled phosphorus and sulfur: Minimizes hot shortness and weld cracking while improving impact toughness
- Silicon content: Functions primarily as a deoxidizer with minor strength contribution
Important Considerations
Always consult the actual ASTM A420 standard and mill test certificate (MTC) for your specific heat/lot. The values provided represent typical specification limits and may vary. Some end users or project specifications may impose tighter limits, particularly for phosphorus, sulfur, or other elements.
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Company
BEST PIPELINE EQUIPMENT CO.,LTD
Location
China Factory : Suzhou Industrial Park, JiangSu Province,China
Contact Person
amy