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SCM 21

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Japan JIS SCM21 Chromium molybdenum steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SCM21 / SCM 21
Category Grade Standard Region/Area Standard Content
Metals SCM 21 JIS G4105 Japan Chromium molybdenum steels

Chemical composition(mass fraction)(wt.%) of the SCM 21

Element Min Max Similar
Si 0.1500 0.3500 -
S - 0.0300 -
P - 0.0300 -
Ni - 0.2500 -
Mo 0.1500 0.3000 -
Mn 0.6000 0.8500 -
Cu - 0.3000 -
Cr 0.9000 1.2000 -
C 0.1300 0.1800 -

Mechanical Properties of steel grade SCM 21

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)
447 (≥) 918 (≥) 44 31 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 233

Physical Properties of steel grade SCM 21

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
22 - -     0.41 -  
539 289 - 44.3 444   -  
188 - 43 42.2   224 443

Heat Treatment of steel grade SCM 21

Heat treated : 1521°C - 1528°C

Technological Curves of steel grade SCM 21

Cross Reference Table (Equivalent Grade) of SCM 21

Grade Standard Country Application
ASTM 5140
AISI 201
AISI 202
1.2767
17-4PH
AISI 1052
AISI 416Se
AISI 1330
AISI 205 Stainless Steel
AISI A10
AISI A2
AISI A3
AISI A4
1.0036
1.0037
SAE J403
UNS G10100
AMS 4924
ASTM A36
Electrode 100S-1
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