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SFCM 690 R

Japan JIS SFCM690R 鉻鉬鋼鍛鋼件 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SFCM690R / SFCM 690 R
Category Grade Standard Region/Area Standard Content
Metals SFCM 690 R JIS G3221 Japan 鉻鉬鋼鍛鋼件

Chemical composition(mass fraction)(wt.%) of the SFCM 690 R

Element Min Max Similar
Si 0.1500 0.3500 -
S - 0.0300 -
P - 0.0300 -
Mo 0.1500 0.3000 -
Mn 0.3000 0.8500 -
Cu - 0.3000 -
Cr 0.9000 1.5000 -
C - 0.4800 -

Mechanical Properties of steel grade SFCM 690 R

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)
674 (≥) 875 (≥) 14 24 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 221

Physical Properties of steel grade SFCM 690 R

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
41 - -     0.22 -  
412 666 - 23.3 123   -  
248 - 12 21.2   141 233

Heat Treatment of steel grade SFCM 690 R

Heat treated : 1589°C - 1851°C

Technological Curves of steel grade SFCM 690 R

Cross Reference Table (Equivalent Grade) of SFCM 690 R

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