IS 4170

IS 4170 is a lead-free material that, despite its lack of lead content, is well-suited for machining thanks to its structural composition. It can serve as a cost-effective alternative to traditional lead-containing machining brass, particularly in cases where there are no stringent demands for mechanical properties and corrosion resistance.

CHEMICAL COMPOSITION
ElementsMin (%)Max (%)
Cu59.0062.00
Pb0.75
Fe0.10
Total Others0.30
ZnRemainder
MECHANICAL PROPERTIES ACCORDING TO IS 4170 (AS PER TEMPER M)
Range From To UTS Min (Kg/mm²) PS Min (Kg/mm²) Elongation Min (%) Hardness Min Hardness Max
Round (Dia) 1.5 75 35 25
Hex (A/F) 3 70 35 25
Square (A/F) 3 60 35 25
Rectangle (Thickness) 3 50 35 25
PHYSICAL PROPERTIES
Melting Point – Liquidus°F 1660
Melting Point – Solidus°F 1650
Density lb/cu in. at 68°F 0.303
Specific Gravity 8.39
Electrical Conductivity % IACS at 68°F 28
Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F 71
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) 11.6
Specific Heat Capacity Btu/ lb /°F at 68°F 0.09
Modulus of Elasticity in Tension ksi 15000
Modulus of Rigidity ksi 5600
PHYSICAL PROPERTIES
Melting Point – Liquidus°F 1660
Melting Point – Solidus°F 1650
Density lb/cu in. at 68°F 0.303
Specific Gravity 8.39
Electrical Conductivity % IACS at 68°F 28
Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F 71
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) 11.6
Specific Heat Capacity Btu/ lb /°F at 68°F 0.09
Modulus of Elasticity in Tension ksi 15000
Modulus of Rigidity ksi 5600

IS 4170

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