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Grade 420
USA UNS S42000
Corresponding Standard ASTM A959-2004
Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels
Classification Martensitic Stainless Steel
420 Chemical Element Composition Content (%)
Component C Si Mn P S Cr
Minimum Value 0.15 - - - - 12
Maximum Value - 1 1 0.04 0.03 14
1 Approximate Comparison Table Martensitic Stainless Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB ISC CNS JIS KS ASTM UNS ISO Numerical Grade DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
20Cr13
(2Cr13) 		S42020 420J1 SUS 420J1 STS 420J1 420 S42000 X20Cr 13
4
(ISO 683-13-1986) 		4021-420-00-I X20Cr 13 1.4021 Z20C 13 X20Cr 13 1.4021 20Х13 2303 420S37
2 Approximate Comparison Table Martensitic Stainless Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB ISC CNS JIS KS UNS ISO Numerical Grade DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
30Cr13
(3Cr13) 		S42030 420J2 SUS 420J2 STS 420J2 S42000 X30Cr 13
5
(ISO 683-13-1986) 		4028-420-00-I X30Cr 13 1.4028 Z30C 13
Z33C13 		X30Cr 13 1.4028 30Х13
30KH13 		2304
2304-03 		420S45
3 Approximate Comparison Table Martensitic Stainless Steel
China United States International Organization for Standardization Germany France European Standard Russia
GB ISC UNS ISO Numerical Grade DIN EN/DIN NF EN/NF EN Numerical Grade GOST
40Cr13
(4Cr13) 		S42040 S42000 X39Cr 13
X46Cr13
X52Cr13 		4031-420-00-I
4034-420-00-I
4038-420-00-I 		X38Cr 13 Z40C 14 X39Cr 13 1.4031
1.4034
(1.4038) 		40Х13
4 Approximate Comparison Table Martensitic Stainless Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard
GB ISC CNS JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade
Y30Cr13
(Y3Cr13) 		S42037 420F SUS 420F STS 420F 420F S42000 X29CrS 13 X29CrS 13 1.4029 Z30CF 13 X29CrS 13 1.4029
5 Approximate Comparison Table Martensitic Heat-Resistant 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 UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST BS EN/BS
20Cr13
(2Cr13) 		S42020 420J1 SUS 420J1 STS 420J1 420 S42000 X20Cr 13 X20Cr 13 1.4021 420F 20
Z20C 13 		X20Cr 13 1.4021 20Х13 420S37
6 Approximate Comparison Table Plastic Mold Steel
China Japan United States International Organization for Standardization Germany Sweden
GB ISC JIS ASTM ISO DIN EN/DIN W-Nr. SS
2Cr13 S42023 SUS 420J1 420 X20Cr13 X20Cr13 1.4021 2303
7 Approximate Comparison Table Martensitic Heat-Resistant Steel
China Japan United States Germany France European Standard Russia Sweden United Kingdom
GB JIS ASTM UNS DIN EN/DIN NF EN/NF EN Numerical Grade GOST SS BS EN/BS
20Cr13
2Cr13
X20Cr13 		SUS420J1 420 S42010
S42010 		X20Cr13 X20Cr13
Z20C13 		X20Cr13 1.4021 20KH13 2303 420S29
420S37
8 Approximate Comparison Table Martensitic Heat-Resistant Steel
China Japan United States Germany France European Standard Russia Sweden United Kingdom
GB JIS ASTM DIN EN/DIN NF EN/NF EN Numerical Grade GOST SS BS EN/BS
3Cr13 SUS420J2 420 X30Cr13 Z30Cr13
Z33C13 		X30Cr13 1.4028 30KH13 2304
2304-03 		420S45
420 Corresponding Standards(Same grade name, different standards)
1 ASTM A959-2004
420 S42000
2 ASTM A276/A276M-2017
420 S42000
3 ASTM A473-2018
420 S42000
4 ASTM A240/A240M-2020
420 S42000
5 ASTM A959-2019
420 S42000
6 ASTM A 314-2025
420 S42000
7 ASTM A 473-2024(a)
420 S42000
8 ASTM A276/A276M-2025
420 S42000

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