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B740 C72900

America ASTM B740C72900 铜镍锡旋节合金带材 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: B740C72900 / B740 C72900
Category Grade Standard Region/Area Standard Content
Metals B740 C72900 ASTM B740 America 铜镍锡旋节合金带材

Chemical composition(mass fraction)(wt.%) of the B740 C72900

Element Min Max Similar

Mechanical Properties of steel grade B740 C72900

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)
149 (≥) 845 (≥) 32 34 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 223

Physical Properties of steel grade B740 C72900

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
14 - -     0.13 -  
565 428 - 34.3 114   -  
757 - 23 41.2   344 144

Heat Treatment of steel grade B740 C72900

Heat treated : 1234°C - 1451°C

Technological Curves of steel grade B740 C72900

Cross Reference Table (Equivalent Grade) of B740 C72900

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