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STM-R 780

Japan JIS STM-R780 钻探用无缝钢管 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: STM-R780 / STM-R 780
Category Grade Standard Region/Area Standard Content
Metals STM-R 780 JIS G3465 Japan 钻探用无缝钢管

Chemical composition(mass fraction)(wt.%) of the STM-R 780

Element Min Max Similar

Mechanical Properties of steel grade STM-R 780

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)
521 (≥) 161 (≥) 42 42 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 141

Physical Properties of steel grade STM-R 780

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
24 - -     0.13 -  
767 779 - 23.3 322   -  
913 - 13 14.2   324 131

Heat Treatment of steel grade STM-R 780

Heat treated : 1248°C - 1245°C

Technological Curves of steel grade STM-R 780

Cross Reference Table (Equivalent Grade) of STM-R 780

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