C38500

C38500, categorized as Free cutting brass, represents a notably enhanced iteration of 60/40 brass, distinguished by its exceptional free cutting characteristics. It finds application in the large-scale manufacturing of brass components demanding peak efficiency and extended tool longevity, particularly in scenarios where no additional cold forming is needed post-machining.

CHEMICAL COMPOSITION
ElementsMin (%)Max (%)
Cu56.0059.00
Pb2.003.50
Total Others0.75
ZnRemainder
MECHANICAL PROPERTIES ACCORDING TO ASTM B455 (AS PER TEMPER HO2)
Range From To UTS Min (Kg/mm²) PS Min Elongation Min (%) Hardness Min Hardness Max
Round (Dia) 1.5 75 39 12
Hex (A/F) 3 70 39 12
Square (A/F) 3 60 39 12
Rectangle (Thickness) 3 50 39 12
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

C38500

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