DESCRIPTION
IS 8737 are the reference materials for hot working. The mean Lead content provides good machinability of the forged part. Because of its Composition this alloy is suited for the production of LPG Valve.
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 |
| 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 |
