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China CNS C1720B 铍铜、磷青铜及镍银之棒及线 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: C1720B / C 1720 B
Category Grade Standard Region/Area Standard Content
Metals C 1720 B CNS H 3052 China 铍铜、磷青铜及镍银之棒及线

Chemical composition(mass fraction)(wt.%) of the C 1720 B

Element Min Max Similar
Cu+Be+Ni+Co+Fe 99.5000 - -
Ni+Co+Fe - 0.6000 -
Ni+Co - 0.2000 -
Be 1.8000 2.0000 -

Mechanical Properties of steel grade C 1720 B

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)
877 (≥) 849 (≥) 32 43 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 431

Physical Properties of steel grade C 1720 B

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
11 - -     0.41 -  
359 244 - 12.3 231   -  
848 - 42 14.2   444 211

Heat Treatment of steel grade C 1720 B

Heat treated : 1656°C - 1967°C

Technological Curves of steel grade C 1720 B

Cross Reference Table (Equivalent Grade) of C 1720 B

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