IS2704

IS2704 takes the lead as the standard material for machining. These alloys also shine in hot stamping, especially when the forged parts undergo extensive post-forging machining. They are the ideal choice for applications that involve minimal cold working with minimal reduction, such as knurling. Thanks to their remarkable ductility, these materials are exceptionally well-suited for crafting wires, rods, and sections.

CHEMICAL COMPOSITION
ElementsMin (%)Max (%)
Cu62.0065.00
Pb0.751.50
Fe0.10
Total Others0.50
ZnRemainder
MECHANICAL PROPERTIES ACCORDING TO IS 2704(AS PER TEMPER HB)
Range (Imm) From To UTS Min (MPa) UTS Max (MPa) PS Min Elongation Min (%) Hardness Min (HV) Hardness Max (HV)
Round (A/F) 1.5 6 400 490 20 131 150
Hex (A/F) 3 6 400 490 20 131 150
Square (A/F) 3 6 400 490 20 131 150
Rectangle (Thickness) 6 12 400 490 20 131 150
PHYSICAL PROPERTIES
Melting Point – Liquidus°F 1700
Melting Point – Solidus°F 1630
Density lb/cu in. at 68°F 0.306
Specific Gravity 8.47
Electrical Conductivity % IACS at 68°F 26
Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F 67
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) 11.3
Specific Heat Capacity Btu/ lb /°F at 68°F 0.09
Modulus of Elasticity in Tension ksi 15000
Modulus of Rigidity ksi 5600
FABRICATION PROPERTIES 
Technique Suitability
Soldering Excellent
Brazing Good
Oxyacetylene Welding Not Recommended
Gas Shielded Arc Welding Not Recommended
Coated Metal Arc Welding Not Recommended
Spot Weld Not Recommended
Seam Weld Not Recommended
Butt Weld Fair
Capacity for Being Cold Worked Good
Capacity for Being Hot Formed Poor
Machinability Rating 70

IS2704

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