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Grade SUS 420J1
Other Names
Corresponding Standard JIS G 4305-2021
Cold-Rolled Stainless Steel Plate, Sheet and Strip
Classification Martensitic Stainless Steel
Properties Corrosion Resistance
SUS 420J1 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni
Minimum Value 0.16 - - - - 12 -
Maximum Value 0.25 1 1 0.04 0.03 14 0.6
①Where necessary, –CP may be attached after the above symbol of grade to indicate that the product is a plate. Example SUS 310L-CP
②Where necessary, –CS may be attached after the above symbol of grade to indicate that the product is a strip. Example SUS304-CS
SUS 420J1 Mechanical Properties
Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW
Annealing ≥520 ≥225 ≥18 ≤223
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 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
3 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
4 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
SUS420J1 Corresponding Standards(Same grade name, different standards)
1 JIS G 4303-2005
SUS 420J1
2 JIS G 4304-2005
SUS 420J1 SUS 420J1-HP SUS 420J1-HS
3 JIS G 4308-2013
SUS 420J1
4 JIS G 4309-2013
SUS 420J1 SUS 420J1-W2
5 JIS G 4318-2016
SUS 420J1
6 JIS G 4305-2021
SUS 420J1 SUS 420J1-CP SUS 420J1-CS

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