Grade SNCM 630
Old Grade
Corresponding Standard JIS G 4103-1979
Nickel Chromium Molybdenum Steel
Classification Alloy Steel
SNCM 630 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo
Minimum Value 0.25 0.15 0.35 - - 2.5 2.5 - 0.5
Maximum Value 0.35 0.35 0.6 0.03 0.03 3.5 3.5 0.3 0.7
SNCM 630 Mechanical Properties
Heat Treatment or Condition
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Reduction of Area
ψ
%
Hardness
HBW
Impact Energy Absorption
KV2
J
Quenching + Tempering ≥1079 ≥883 ≥15 ≥45 302~352 ≥78
New and Old Grade Replacement List
Corresponding Standard Grade
JIS G 4103-1979
Grade
Old Grade
JIS G 4053-2016
Grade
SNCM630 Corresponding Standards(Same grade name, different standards)

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