CW710R

CW710R is a type of brass that is easily extrudable. It falls under the category of leaded alpha/beta brass with an added element of aluminum, which imparts a vibrant golden hue to its appearance. The inclusion of a small amount of lead enhances its free-cutting characteristics, making it conducive for machining and other applications where ease of cutting is important.

CHEMICAL COMPOSITION
ElementsMin (%)Max (%)
Cu58.0060.00
Pb0.200.80
Al0.301.30
Fe0.50
Mn1.502.50
Ni2.003.00
Sn0.50
Si0.10
Total Others0.30
ZnRemainder
MECHANICAL PROPERTIES ACCORDING TO EN12165 CW710R (AS PER TEMPER H120)
Range (mm) From To UTS Min (N/mm²) PS Min (N/mm²) Elongation Min (%) Hardness Min (HB) Hardness Max (HB)
Round (Dia)875120200
Hex (a/F)860120200
Square (A/F)860120200
Rectangle (Thickness)850120200
PHYSICAL PROPERTIES
Electrical conductivity 7.8 %IACS
Thermal conductivity63 W/(m•K)
Thermal expansion coefficient (0–300 °C) 20.6 10-6/K
Density 8.12 g/cm³
Modulus of elasticity 93 Gpa
FABRICATION PROPERTIES
Machinability (CuZn39Pb3 = 100 %)50%
Capacity for being cold workedPoor
Capacity for being hot workedgood
Resistance welding (butt weld)good
Inert gas shielded arc weldingfair
Gas weldingfair
Hard solderingfair
Soft soldering fair
Melting range 870 – 900 °C
Hot working 600–700 °C
Soft annealing 500–650 °C (1–3 hr)
Thermal stress relieving 350–450 °C (1-3 hr)

CW710R

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