Lead Free Brass
Lead free brass possess relatively good corrosion resistance, moderately high strength, and in some forms, it has very good ductility. Its hot forms are strong. Also known as Muntz metal was commonly used as an affordable alternative for the copper sheeting formerly placed on boat hulls to avoid the formation of marine organisms like barnacles on the hulls. It is available mainly in 60/40 and 63/37 Cu/Zn ratio.
Different Grades, Chemical Composition, Physical and Fabrication Properties of Lead Free Brass
| Product |
Lead Free Brass |
| SPECIFICATION |
CuZn40 BS2874/1969 CZ109 JIS C2800 |
CuZn37 IS 4413/1983 CZ 108 |
|
| Chemical Composition |
% |
% |
| Copper |
59.00 - 62.00 |
62.00 - 65.00 |
| Lead |
0.10 Max |
0.30 Max |
| Tin |
- |
- |
| Iron |
0.10 Max |
0.10 Max |
| Manganese |
- |
- |
| Aluminium |
- |
- |
| Zinc |
Balance |
Balance |
| Impurities |
0.30 Max. |
0.60 Max. |
|
| Physical Properties |
|
| Tensile (Kgs/mm2) |
35 Min. |
29 Min. |
| Elongation-5.65 √A |
25% Min. |
33% Min. |
| Izod (kgfm) |
- |
- |
|
| Fabrication Properties |
|
| Cold Working |
Excellent |
Excellent |
| Hot Forming |
Fair |
Fair |
| Machinability |
40% |
35% |
| Soldering |
Excellent |
Excellent |
| Brazing |
Excellent |
Excellent |
| Forging |
Excellent |
Excellent |
| Welding |
Fair |
Fair |
| Bending / Revetting |
Excellent |
Excellent |
Lead Free Brass is suitable for blanking, riveting, bending, hot forging & pressing.
