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Home Material JIS G 4104-1979
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Grade SCr415
Old Grade
Corresponding Standard JIS G 4104-1979
Chromium steels
Classification Alloy Steel
SCr415 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu
Minimum Value 0.13 0.15 0.6 - - 0.9 - -
Maximum Value 0.18 0.35 0.85 0.03 0.03 1.2 0.25 0.3
SCr415 Mechanical Properties
Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
% 		Hardness
HBW 		Impact Energy Absorption
KV2
J
Double Quenching and Tempering ≥785 ≥15 ≥40 217~302 ≥59
New and Old Grade Replacement List
Corresponding Standard Grade
JIS G 4104-1979
Grade
Old Grade
JIS G 4053-2003
Grade
JIS G 4053-2016
Grade
1 Approximate Comparison Table structural alloy steel
China Taiwan, China Japan South Korea United States Germany France Russia United Kingdom
GB ISC CNS JIS KS ASTM/AISI UNS DIN EN/DIN W-Nr. NF EN/NF GOST BS EN/BS
15Cr A20152 SCr415 SCr415 SCr415 5115 G51150 15Cr3 1.7015 12C3 15Х 523A14
523M15
2 Approximate Comparison Table
China Japan United States
GB ISC JIS ASTM
ML15Cr A20154 SCr415 5115
SCr415 Corresponding Standards(Same grade name, different standards)
1 JIS G 4053-2003
SCr415
2 JIS G 4053-2016
SCr415
3 Q/BQB 517-2018
SCr415
4 JIS G 4104-1979
SCr415 (SCr 21)

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