SCM421 SCM 23 - JIS G 4105-1979

Grade	SCM421
Old Grade
Corresponding Standard	JIS G 4105-1979 Chromium molybdenum steels
Classification	Alloy Steel

SCM421 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
Minimum Value	0.17	0.15	0.7	-	-	0.9	-	-	0.15
Maximum Value	0.23	0.35	1	0.03	0.03	1.2	0.25	0.3	0.25

SCM421 Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW	Impact Energy Absorption KV2 J
Double Quenching and Tempering	≥980.7	≥14	≥35	285~375	≥59

New and Old Grade Replacement List

Approximate Comparison Table Structural Alloy Steel

SCM421 Corresponding Standards(Same grade name, different standards)

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!