Description
IS 8737 serves as the benchmark materials for hot working processes. The average lead content contributes to favorable machinability of the forged components. Additionally, due to its composition, this alloy is well-suited for crafting LPG Valves.
Chemical Composition
| Elements | Min (%) | Max (%) |
| Cu | 56.50 | 60.000 |
| Pb | 1.00 | 2.00 |
| Fe | – | 0.30 |
| Mn | 0.50 | – |
| Total Others | – | 0.75 |
| Zn | Remainder |
Mechanical Properties According To IS 8737 MOD (As Per Temper HB)
| Range (mm) |
From |
To |
UTS Min (MPa) |
PS Min (MPa) |
Elongation Min (%) |
Hardness Min |
Hardness Max |
| Round (Dia) |
1.5 |
75 |
392 |
– |
18 |
– |
– |
| Hex (A/F) |
3 |
70 |
392 |
– |
18 |
– |
– |
| Square (A/F) |
3 |
60 |
392 |
– |
18 |
– |
– |
| Physical Properties | Metric | English |
| Density | 8.40 g/cc | 0.303 lb/in3 |
| CTE, linear | 26.0 ᶙm/m-˚C | 14.4 ᶙin/in-˚F |
| Specific Heat Capacity | 0.380 J/g-˚C | 0.0908 BTU/lb-˚F |
| Thermal Conductivity | 113 W/m-K | 784 BTU-in/hr-ft²-˚F |
| Melting Point | 880-900 ˚C | 1620 – 1650 ˚F |
| Solidus | 880 ˚C | 1620 ˚F |
| Liquidus | 900 ˚C | 1650˚F |
Fabrication Properties
| Machinability (CuZn39Pb3 = 100 %) | 80% |
| Capacity for being cold worked | Poor |
| Capacity for being hot worked | excellent |
