General Information
B61 is a leaded tin bronze gunmetal alloy and has high strength. Gunmetal alloys are useful for many applications because of their combination of high strength in tension and compression, hardness, ductility and high resistance to impact. This alloy is also known as ‘red brass’.
Typical Applications
This material is used in a variety of applications. Typical uses for this alloy are valves, fittings, and pressure containing parts.
B61 (ASTM C92200) Chemical Composition
| Copper (Cu) | 84 – 86% |
|---|---|
| Lead (Pb) | 4.0 – 6.0 |
| Tin (Sn) | 4.0 – 6.0 |
| Zinc (Zn) | 4.0 – 6.0 |
| Iron (Fe) | 0.3 Max |
| Nickel (Ni) | 0.1 Max |
| Aluminium (Al) | 0.005 Max |
| Sulphur (S) | 0.08 Max |
| Silicon (SI) | 0.005 Max |
B61 (ASTM C92200) Mechanical Properties
| Tensile Strength | 255 MPa |
|---|---|
| Yield Strength | 117 MPa |
| Elongation at break | 30% |
| Creep Strength (0.1% creep in 10,000h, at 290C0 | 48.0 MPa |