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Home Material JIS G 4103-1979
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Grade SNCM 220
Old Grade
Corresponding Standard JIS G 4103-1979
Nickel Chromium Molybdenum Steel
Brand/Supplier
Japan -> NSSC
Classification Alloy Steel
SNCM 220 Chemical Element Composition Content (%)
  Component C Si Mn P S Cr Ni Cu Mo
本标准 Minimum Value 0.17 0.15 0.6 - - 0.4 0.4 - 0.15
Maximum Value 0.23 0.35 0.9 0.03 0.03 0.65 0.7 0.3 0.3
  Component C Si Mn P S Cr Ni Cu Mo
新日铁 Minimum Value 0.17 0.15 0.6 - - 0.4 0.4 - 0.15
Maximum Value 0.23 0.35 0.9 0.03 0.03 0.6 0.7 0.3 0.25
SNCM 220 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 ≥834 ≥17 ≥40 248~341 ≥59
New and Old Grade Replacement List
Corresponding Standard Grade
JIS G 4103-1979
Grade
Old Grade
JIS G 4053-2016
Grade
1 Approximate Comparison Table structural alloy steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France Russia Sweden United Kingdom
GB ISC CNS JIS KS ASTM/AISI UNS ISO DIN EN/DIN W-Nr. NF EN/NF GOST SS14 BS EN/BS
20CrNiMo A50202 SNCM220 SNCM220 SNCM220 8620 G86200 20NiCrMo2 21NiCrMo2 1.6523 20NCD2 20ХНМ 2506 805M20
2 Approximate Comparison Table structural alloy steel
China Japan International Organization for Standardization Germany France European Standard Russia United Kingdom
GB JIS ISO DIN EN/DIN NF EN/NF EN Numerical Grade GOST BS EN/BS
20CrNiMoH SNCM220
SNCM220H 		20NiCrMo2-2
20NiCrMo2 		21NiCrMo2 20NCD2 20NiCrMo2-2 1.6523 20KHGNM 805M20
3 Approximate Comparison Table
China Japan International Organization for Standardization European Standard
GB JIS ISO EN Numerical Grade
20CrNiMoH SNCM220
SNCM220H 		20NiCrMo2-2 20NiCrMo2-2 1.6523
SNCM220 Corresponding Standards(Same grade name, different standards)
1 JIS
SNCM220
2 JIS G 4053-2016
SNCM220
3 JIS G 4103-1979
SNCM 220 (SNCM 21)

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