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Home Material GB /T 1221-2007
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Grade 05Cr17Ni4Cu4Nb
China ISC S51740
Old Grade
Corresponding Standard GB /T 1221-2007
Heat-resistant Steel Bars
Classification Precipitation-Hardening Stainless Steel
Properties Strength Corrosion Resistance
05Cr17Ni4Cu4Nb 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
05Cr17Ni4Cu4Nb Mechanical Properties
diameter
d
mm		 Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW
d≤75 (solution treatment) ≤363
d≤75 (precipitation hardening) ≥1310 ≥1180 ≥10 ≥375
d≤75 (precipitation hardening) ≥1070 ≥1000 ≥12 ≥331
d≤75 (precipitation hardening) ≥1000 ≥865 ≥13 ≥302
d≤75 (precipitation hardening) ≥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
05Cr17Ni4Cu4Nb Corresponding Standards(Same grade name, different standards)
1 GB /T 20878-2007
05Cr17Ni4Cu4Nb S51740 (0Cr17Ni4Cu4Nb)
2 GB /T 1221-2007
05Cr17Ni4Cu4Nb S51740 (0Cr17Ni4Cu4Nb)
3 GB /T 1220-2007
05Cr17Ni4Cu4Nb S51740 (0Cr17Ni4Cu4Nb)
4 GB /T 4356-2016
05Cr17Ni4Cu4Nb S51740
5 GB /T 4238-2015
05Cr17Ni4Cu4Nb S51740 (0Cr17Ni4Cu4Nb)
6 GB /T 8732-2014
05Cr17Ni4Cu4Nb S51740 (0Cr17Ni4Cu4Nb)
7 GB /T 41157.3-2022
05Cr17Ni4Cu4Nb 630
8 JB /T 6908-2020
05Cr17Ni4Cu4Nb S51740
9 GJB 8268-2014
05Cr17Ni4Cu4Nb (0Cr17Ni4Cu4Nb)
10 GB /T 20878-2024
05Cr17Ni4Cu4Nb S51740 (0Cr17Ni4Cu4Nb)

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