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Grade SUS 431
Corresponding Standard JIS G 4303-2005
Stainless Steel Bars
Classification Martensitic Stainless Steel
Properties Corrosion Resistance
SUS 431 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni
Minimum Value - - - - - 15 1.25
Maximum Value 0.2 1 1 0.04 0.03 17 2.5
SUS 431 Mechanical Properties
diameter(thickness)
d(t)
mm		 Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
% 		Hardness
HBW
≤75 ≥780 ≥590 ≥15 ≥40 ≥229
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
14Cr17Ni2
(1Cr17Ni2)
17Cr16Ni2 		S43110
/
S43120 		431 SUS 431 STS 431 431 S43100 X17CrNi 16-2 4057-431-00-X X20CrNi 17-2
(X22CrNi 17) 		1.4057 Z15CN 16-02 X17CrNi 16-2 1.4057 14Х17Н2 2321 431S29
2 Approximate Comparison Table Martensitic Heat-Resistant Steel
China Taiwan, China Japan South Korea United States Germany France European Standard Russia Sweden United Kingdom
GB ISC CNS JIS KS ASTM UNS DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
14Cr17Ni2
(1Cr17Ni2) 		S43110 431 SUS 431 STS 431 431 S43100 X20CrNi 17-2
(X 22CrNi 17) 		1.4057 Z15CN 16-02 X17CrNi 16-2 1.4057 14Х17Н2 2321 431S29
3 Approximate Comparison Table Plastic Mold Steel
China Japan United States Germany Sweden
GB ISC JIS ASTM DIN EN/DIN W-Nr. SS
2Cr17Ni2 T25402 SUS 431 431 X22CrNi 17 1.4057 2321
4 Approximate Comparison Table Stainless Steels for Cold Heading and Cold Extruding
China Japan South Korea United States International Organization for Standardization Germany United Kingdom
GB JIS KS ASTM/AISI ISO DIN EN/DIN BS EN/BS
1Cr17Ni2 SUS431 STS431 431 X17CrNi16-2 X20CrNi17-2 431S29
5 Approximate Comparison Table Martensitic Stainless Steel
China Japan United States International Organization for Standardization Germany France Russia
GB JIS ASTM/AISI ISO DIN EN/DIN NF EN/NF GOST
1Cr17Ni2 SUS431 431 9
(ISO 683-13-1986) 		X22CrNi17 Z15CN16-02 14X17H2
SUS431 Corresponding Standards(Same grade name, different standards)
1 JIS
SUS431
2 JIS G 4303-2005
SUS 431
3 JIS G 4308-2013
SUS 431

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