IS 4170

DESCRIPTION

IS 4170 is a lead free material which is however quite suitable for machining due to its structural constitution. IS 4170 can be used as a cost-effective replacement for conventional lead-containing machining brass provided that it must not meet high requirements as regards mechanical properties and corrosion resistance

CHEMICAL COMPOSITION

Elements Min (%) Max (%)
Cu 59.00 62.00
Pb - 0.75
Fe - 0.10
Total Others - 0.30
Zn Remainder

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
FABRICATION PROPERTIES 
Technique   Suitability
Soldering Excellent
Brazing Excellent
Oxyacetylene Welding Good
Gas Shielded Arc Welding Fair
Coated Metal Arc Welding Not Recommended
Spot Weld Good
Seam Weld Not Recommended
Butt Weld Good
Capacity for Being Cold Worked Fair
Capacity for Being Hot Formed Excellent
Forgeability Rating 90
Machinability Rating 40

TYPICAL USES

  • Architecture
  • Builders Hardware
  • Fasteners
  • Industrial