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Grade SUS 630
Other Names
Corresponding Standard JIS G 4305-2021
Cold-rolled stainless steel plate, sheet and strip
Classification Precipitation-Hardening Stainless Steel
Properties Corrosion Resistance
SUS 630 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Nb
Minimum Value - - - - - 15 3 3 0.15
Maximum Value 0.07 1 1 0.04 0.03 17.5 5 5 0.45
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 630 Mechanical Properties
thickness
t
mm		 Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW
Solid Solution - - - ≤363
t≤5 Precipitation Hardening (H900) ≥1310 ≥1175 ≥5 ≥375
5<t≤15 Precipitation Hardening (H900) ≥1310 ≥1175 ≥8 ≥375
t>15 Precipitation Hardening (H900) ≥1310 ≥1175 ≥10 ≥375
t≤5 Precipitation Hardening (H1025) ≥1070 ≥1000 ≥5 ≥331
5<t≤15 Precipitation Hardening (H1025) ≥1070 ≥1000 ≥8 ≥331
t>15 Precipitation Hardening (H1025) ≥1070 ≥1000 ≥12 ≥331
t≤5 Precipitation Hardening (H1075) ≥1000 ≥800 ≥5 ≥302
5<t≤15 Precipitation Hardening (H1075) ≥1000 ≥800 ≥9 ≥302
t>15 Precipitation Hardening (H1075) ≥1000 ≥800 ≥13 ≥302
t≤5 Precipitation Hardening (H1150) ≥930 ≥725 ≥8 ≥277
5<t≤15 Precipitation Hardening (H1150) ≥930 ≥725 ≥10 ≥277
t>15 Precipitation Hardening (H1150) ≥930 ≥725 ≥16 ≥277
1 Approximate Comparison Table Precipitation Hardening 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 Numerical Grade DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade
05Cr17Ni4Cu4Nb
(0Cr17Ni4Cu4Nb) 		S51740 630 SUS 630 STS 630 630 S17400 X5CrNiCuNb 16-4
1
(ISO 683-13-1986) 		4542-174-00-I X5CrNiCuNb 17-4 1.4542 Z6CNU 17-04 X5CrNiCuNb 16-4 1.4542
2 Approximate Comparison Table Precipitation Hardening Heat-Resistant 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
05Cr17Ni4Cu4Nb
(0Cr17Ni4Cu4Nb) 		S51740 630 SUS 630 STS 630 630 S17400 X5CrNiCuNb 16-4 X5CrNiCuNb 17-4 1.4542 Z6CNU 17-04 X5CrNiCuNb 16-4 1.4542
SUS630 Corresponding Standards(Same grade name, different standards)
1 JIS G 4303-2005
SUS 630
2 JIS G 4304-2005
SUS 630 SUS 630-HP SUS 630-HS
3 JIS G 4308-2013
SUS 630
4 JIS G 4305-2021
SUS 630 SUS 630-CP SUS 630-CS

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