LG2 (Leaded Gunmetal)
LG2 Leaded Gunmetal is a cast copper-based alloy known for good machinability and reliable performance in pressure-tight components. It is commonly used for valve bodies, pump bodies, and industrial castings.
- Description
- Product Specifications
Description
LG2 Leaded Gunmetal is a copper, tin, zinc, and lead alloy commonly used where cast components need strength, pressure tightness, and dependable machining performance. Its composition makes it suitable for industrial parts that require accurate finishing after casting.
This alloy is typically used in cast form and is well suited to valve bodies, pump bodies, and similar components. It offers a machinability rating of 84 and is commonly processed through machining and knurling.
Key Features:
- Cast leaded gunmetal alloy
- Good machinability
- Suitable for pressure-tight requirements
- Commonly used for valve bodies and pump bodies
- Used in continuous and centrifugal cast forms
- Suitable for machining and knurling
- Applicable to industrial casting applications
| Element | Composition | Nominal |
|---|---|---|
| Copper (Cu) | Balance | 85% |
| Tin (Sn) | 4-6% | 5% |
| Zinc (Zn) | 4.5-6.0% | 4.9% |
| Lead (Pb) | 4-6% | 5% |
| Phosphorus (P) | 0.02% max | – |
| Nickel (Ni) | 2% max | – |
| Iron (Fe) | 0.25% max | 0.1% |
| Cast Type | Tensile Strength | Yield Strength | Elongation | Brinell Hardness |
|---|---|---|---|---|
| Continuous Cast | 270 MPa | 100 MPa | 13% | 65 HB |
| Centrifugal Cast | 220 MPa | 110 MPa | 8% | 70 HB |
| Density | 8.8 g/cm³ at 20°C |
|---|---|
| Specific Gravity | 8.8 |
| Machinability Rating | 84 |
| Common Fabrication Processes | Machining and knurling |
| Stress Relieve Temperature | 260°C |
| Maximum Work Temperature | 230°C |
| Common Form | Cast |
| Typical Uses | Pressure-tight components, valve bodies and pump bodies |
| Applicable Specifications | AS 83600, BS 1400 LG2, UNS C83600, SAE 40, BS EN CC491K |
