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England B.S. CW721R Copper and copper alloys. Rod for free machining purposes and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: CW721R / CW721R
Category Grade Standard Region/Area Standard Content
Metals CW721R BS EN 12164 England Copper and copper alloys. Rod for free machining purposes

Chemical composition(mass fraction)(wt.%) of the CW721R

Element Min Max Similar

Mechanical Properties of steel grade CW721R

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
293 (≥) 953 (≥) 33 44 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 131

Physical Properties of steel grade CW721R

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
22 - -     0.32 -  
576 851 - 43.3 243   -  
628 - 41 21.2   212 412

Heat Treatment of steel grade CW721R

Heat treated : 1622°C - 1568°C

Technological Curves of steel grade CW721R

Cross Reference Table (Equivalent Grade) of CW721R

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