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Home Material GB /T 4239-1991
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Grade 07Cr17Ni7Al
China ISC S51770
Old Grade
Corresponding Standard GB /T 4239-1991
Cold Rolled Stainless Steel and Heat-Resisting Steel Strip
Classification Precipitation-Hardening Stainless Steel
Properties Corrosion Resistance
Density 7.81 g/cm3
07Cr17Ni7Al Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Al
Minimum Value - - - - - 16 6.5 0.75
Maximum Value 0.09 1 1 0.035 0.03 18 7.75 1
07Cr17Ni7Al Mechanical Properties
thickness
t
mm		 Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW
/(solution) ≤1030 ≤380 ≥20 HV
≤200
≤3 (565°C aging) ≥1140 ≥960 ≥3 HV
≥345
＞3 ≥1140 ≥960 ≥5 ≥345
≤3 (510°C aging) ≥1225 ≥1030 HV
≥392
＞3 ≥1225 ≥1030 ≥4 ≥392
1 Approximate Comparison Table Precipitation Hardening Stainless Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia
GB ISC CNS JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST
07Cr17Ni7Al
(0Cr17Ni7Al) 		S51770 631 SUS 631 STS 631 631 S17700 X7CrNiAl 17-7
2
(ISO 683-13-1986) 		X7CrNiAl 17-7 1.4568 Z8CNA 17-07 X7CrNiAl 17-7 1.4568 09Х17Н7Ю
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 Russia
GB ISC CNS JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST
07Cr17Ni7Al
(0Cr17Ni7Al) 		S51770 631 SUS 631 STS 631 631 S17700 X7CrNiAl 17-7 X7CrNiAl 17-7 1.4568 Z8CNA 17-07 X7CrNiAl 17-7 1.4568 09Х17Н7Ю
07Cr17Ni7Al Corresponding Standards(Same grade name, different standards)
1 GB /T 20878-2007
07Cr17Ni7Al S51770 (0Cr17Ni7Al)
2 GB /T 1221-2007
07Cr17Ni7Al S51770 (0Cr17Ni7Al)
3 GB /T 1220-2007
07Cr17Ni7Al S51770 (0Cr17Ni7Al)
4 GB /T 4356-2016
07Cr17Ni7Al S51770
5 GB /T 4239-1991
07Cr17Ni7Al S51770 (0Cr17Ni7Al)
6 GB /T 3280-2015
07Cr17Ni7Al S51770
7 GB /T 4238-2015
07Cr17Ni7Al S51770 (0Cr17Ni7Al)
8 GB /T 4237-2015
07Cr17Ni7Al S51770
9 GB /T 24588-2019
07Cr17Ni7Al S51770 (0Cr17Ni7Al)
10 GJB 8268-2014
07Cr17Ni7Al S51770 (0Cr17Ni7Al)
11 GB /T 20878-2024
07Cr17Ni7Al S51770 (0Cr17Ni7Al)

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