C3604

C3604, classified as Free cutting brass, stands as a notably refined version of 60/40 brass, showcasing exceptional free cutting characteristics. Its utilization lies in the high-volume production of brass components necessitating optimal output and extended tool longevity. This is particularly relevant in situations where no subsequent cold forming is needed after the machining process.

CHEMICAL COMPOSITION
ElementsMin (%)Max (%)
Cu57.0061.00
Pb1.803.70
Fe0.50
Sn + Fe1.20
ZnRemainder
MECHANICAL PROPERTIES ACCORDING TO H3250 JIS C3604 (AS PER TEMPER BD)
Range From To UTS Min (Kg/mm²) PS Min Elongation Min (%) Hardness Min Hardness Max
Round (Dia) 1.5 75 335 80
Hex (A/F) 3 70 335 80
Square (A/F) 3 60 335 80
Rectangle (Thickness) 3 50 335 80
PHYSICAL PROPERTIES
Melting Point – Liquidus°F 1630
Melting Point – Solidus°F 1610
Densitylb/cu in. at 68°F 0.306
Specific Gravity 8.47
Electrical Conductivity% IACS at 68°F 28
Thermal ConductivityBtu/ 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 CapacityBtu/ lb /°F at 68°F 0.09
Modulus of Elasticity in Tensionksi 14000
Modulus of Rigidityksi 5300
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 Poor
Capacity for Being Hot Formed Excellent
Machinability Rating 90

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