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CM690 hot rolled steel round bars
CM690 hot rolled steel round bars
CM690 hot rolled steel round bars
CM690 hot rolled steel round bars

CM690 hot rolled steel round bars

CM690 grade, What's the Chemical Composition of GB CM690 GB/T 18669? Chemical Composition of CM690 Steel, CM690 steel properties, CM690 carbon Steel, GB steel plate Supplier in Japan, GB steel sheet Exporter, GB steel Price, GB Equivalent steel, GB steel supplier in China, GB steel Chinese equivalent grade, GB CM690 GB/T 18669 steel Specifications
CM690 hot rolled steel round bars information
CM690 grade, What's the Chemical Composition of GB CM690 GB/T 18669? Chemical Composition of CM690 Steel, CM690 steel properties, CM690 carbon Steel, GB steel plate Supplier in Japan, GB steel sheet Exporter, GB steel Price, GB Equivalent steel, GB steel supplier in China, GB steel Chinese equivalent grade, GB CM690 GB/T 18669 steel Specifications
Chemical and Mechanical

Yield strength is the yield limit of GB CM690 GB/T 18669 when yielding occurs, that is, the stress resisting micro-plastic deformation. The external force greater than the yield strength will make the GB CM690 GB/T 18669 parts permanent failure and unable to recover. Less than this, the GB CM690 GB/T 18669 parts will return to their original shape.
Tensile strength is the critical value of transition from uniform plastic deformation to locally concentrated plastic deformation. It is also the maximum load-carrying capacity of GB CM690 GB/T 18669 under static tension. Tensile strength is the resistance that characterizes the maximum uniform plastic deformation of GB CM690 GB/T 18669. The deformation of tensile specimens is uniform before they bear the maximum tensile stress, but beyond that, the GB CM690 GB/T 18669 begins to neck, i.e. concentrate deformation.

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)
812 (≥) 174 (≥) 22 32 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 344
 

GB CM690 GB/T 18669 Physical

Physical properties of GB CM690 GB/T 18669 mainly cover modulus of elasticity, coefficient of thermal expansion, thermal conductivity, specific thermal capacity, electrical resistance value, density, poisson's ratio, etc.

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
31 - -     0.41 -  
834 386 - 24.3 231   -  
671 - 43 14.2     244 213
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