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Home Material SAE J 404-2000
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USA UNS G51200
SAE
Steel Number		 5120
Corresponding Standard SAE J 404-2000
Chemical Compositions of SAE Alloy Steels
Classification Alloy Steel
Chemical Element Composition Content (%)
Component C Si Mn P S Cr
Minimum Value 0.17 0.15 0.7 - - 0.7
Maximum Value 0.22 0.35 0.9 0.03 0.04 0.9
1 Approximate Comparison Table structural alloy steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia United Kingdom
GB ISC CNS JIS KS ASTM/AISI UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST BS EN/BS
20Cr
20CrH 		A20202 SCr420 SCr420
SCr420H
SCR420HRCH 		SCr420 5120 G51200 20Cr4 20Cr4 1.7027 18C3 20Cr4 1.7027 20Х 527A20
2 Approximate Comparison Table structural alloy steel
China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia
GB ISC JIS KS ASTM/AISI UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST
20CrMn
20CrMnH 		A22202 SMnC420 SMnC420 5120 G51200 20MnCr5 20MnCr5 1.7147 20MC5 20MnCr5 1.7147 20ХГ
3 Approximate Comparison Table
China United States International Organization for Standardization Russia
GB ISC ASTM/AISI UNS ISO GOST
ML20Cr A20204 5120 G51200 20Cr4E
(B10) 		20Х
4 Approximate Comparison Table structural alloy steel
China Japan United States International Organization for Standardization Germany France European Standard Russia
GB JIS SAE ISO W-Nr. NF EN/NF EN Numerical Grade GOST
20CrMn
20CrMnTi
20MnCr 		SMnC420H 5120 20MnCr5 20MnCr5 20MC5 20MnCr5 1.7147 18KHG

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