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Grade X7CrNiAl17-7
Germany W-Nr. 1.4568
Corresponding Standard DIN EN 10270-3-2012
Steel Wire for Mechanical Springs – Part 3: Stainless Spring Steel Wire
Classification Precipitation-Hardening Stainless Steel
Properties Elasticity Corrosion Resistance
X7CrNiAl17-7 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni * Al
Minimum Value - - - - - 16 6.5 0.7
Maximum Value 0.09 0.7 1 0.04 0.015 18 7.8 1.5
X7CrNiAl17-7 Mechanical Properties
diameter
d
mm		 Tensile Strength
σb
ksi
d ≤ 0.2 1975~2280
0.2 <d≤ 0.3 1950~2250
0.3<d≤ 0.4 1925~2220
0.4<d≤ 0.5 1900~2190
0.5<d≤ 0.65 1850~2130
0.65<d≤ 0.8 1825~2100
0.8<d≤ 1 1800~2070
1<d≤ 1.25 1750~2020
1.25<d≤ 1.5 1700~1960
1.5<d≤ 1.75 1650~1900
1.75<d≤ 2 1600~1840
2<d≤ 2.5 1550~1790
2.5<d≤ 3 1500~1730
3<d≤ 3.5 1450~1670
3.5<d≤ 4.25 1400~1610
4.25<d≤ 5 1350~1560
5<d≤ 6 1300~1500
6<d≤ 7 1250~1440
7<d≤ 8.5 1250~1440
8.5<d≤ 10 1240~1440
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
X7CrNiAl17-7 Corresponding Standards(Same grade name, different standards)
1 EN 10088-1-2005
X7CrNiAl 17-7 1.4568
2 ISO TS 15510-2003
X7CrNiAl17-7
3 DIN 17224-1982
X7CrNiAl 17-7 1.4568
4 EN 10088-3-2014
X7CrNiAl 17-7 1.4568
5 ISO 15510-2014
X7CrNiAl17-7 4568-177-00-I
6 DIN EN 10088-3-2014
X7CrNiAl 17-7 1.4568
7 DIN EN 10270-3-2012
X7CrNiAl17-7 1.4568
8 DIN EN 10151-2002
X7CrNiAl17-7 1.4568

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