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Grade SCr420H
Corresponding Standard JIS G 4052-2003
Structural steels with specified hardenability bands
Classification Alloy Steel
SCr420H Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu
Minimum Value 0.17 0.15 0.55 - - 0.85 - -
Maximum Value 0.23 0.35 0.95 0.03 0.03 1.25 0.25 0.3
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
China Japan South Korea United States International Organization for Standardization Germany France Russia United Kingdom
GB ISC JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. NF EN/NF GOST BS EN/BS
20CrH A20205 ≈SCr420H ≈SCr420H 5120H H51200 ≈20Cr4H 20Cr4 1.7027 (20MC5) 20Х (527H17)
3 Approximate Comparison Table
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany Russia
GB ISC CNS JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. GOST
20Cr1H A20215 SCr420H SCr420H SCr420H ≈5120H ≈H51200 20Cr4H ≈20Cr4 ≈1.7027 20Х
SCr420H Corresponding Standards(Same grade name, different standards)
1 JIS G 4052-2003
SCr420H
2 Q/BQB 517-2018
SCr420H
3 JIS G 4052-2016
SCr420H

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