8737 MOD

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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

TYPICAL USES

  • Valves LPG