CW721R

High Tensile Brass alloys are compositions of Copper and Zinc. CW721R, in particular, belongs to the category of duplex or alpha/beta alloys. This specific brass alloy, CW721R, is recognized for its versatility, offering high strength, excellent hot workability, and machinability, which has led to it occasionally being referred to as either Manganese Bronze or High Tensile Brass in the realm of engineering materials.

CHEMICAL COMPOSITION
Elements Min (%) Max (%)
Cu 57.00 59.00
Pb 0.80 1.60
Sn 0.20 1.00
Fe 0.20 1.20
Al 0.30 1.30
Mn 0.80 1.80
Ni 0.30
Total others 0.30
Zn Remainder
MECHANICAL PROPERTIES ACCORDING TO EN12164 CW721R (AS PER TEMPER R440)
Range (mm) From To UTS Min (N/mm²) PS Min (N/mm²) ELo Min (%) Hardness Min Hardness Max
Round (Dia)407544018020
Hex (a/F)406044018020
Square (A/F)406044018020
Rectangle (Thickness)405044018020
PHYSICAL PROPERTIES
Melting Point865°C
Density8.63g/cm3
Electrical Conductivity 0.09 x 10-6 Ω.m
Thermal Conductivity 88.3W/m.K
Modulus of Elasticity 96.5 GPa
FABRICATION PROPERTIES
Capacity for being Cold formedPoor
Capacity for being Hot workedGood
Machinability Ration30%
Resistance to CorrosionExcellent
Suitability for solderingExcellent

CW721R

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