CW720R

Manganese is arguably one of the most versatile elements that can be introduced into copper alloys. Even in small quantities, manganese serves several essential purposes, including deoxidizing the alloy, improving its mechanical strength, and enhancing its castability. Manganese plays a pivotal role in achieving a desirable equilibrium of properties, encompassing ductility, formability, strain hardening, as well as various strength-related characteristics.

CHEMICAL COMPOSITION
ElementsMin (%)Max (%)
Cu57.0059.00
Pb1.002.00
Al0.20
Fe0.30
Mn0.501.50
Ni0.60
Si0.10
Sn0.30
Total others0.30
ZnRemainder

 

MECHANICAL PROPERTIES ACCORDING TO EN12164 CW720R (AS PER TEMPER R440)
Range (mm) From To UTS Min (N/mm²) PS Min (N/mm²) Elongation Min (%) Hardness Min (HB) Hardness Max
Round (Dia)65044025018120
Hex (A/F)54044025018120
Square (A/F)54044025018120
Rectangle (Thickness)65044025018120
PHYSICAL PROPERTIES Metric English
Density8.40 g/cc0.303 lb/in3
CTE, linear26.0 ᶙm/m-˚C14.4 ᶙin/in-˚F
Specific Heat Capacity0.380 J/g-˚C0.0908 BTU/lb-˚F
Thermal Conductivity113 W/m-K784 BTU-in/hr-ft²-˚F
Melting Point880-900 ˚C1620 – 1650 ˚F
Solidus880 ˚C1620 ˚F
Liquidus900 ˚C1650˚F
FABRICATION PROPERTIES
Machinability (CuZn39Pb3 = 100 %)80%
Capacity for being cold workedPoor
Capacity for being hot workedexcellent

CW720R

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