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Grade X7CrNiAl 17-7
Germany W-Nr. 1.4568
Corresponding Standard DIN EN 10088-3-2014
Stainless Steels – Part 3: Technical Delivery Conditions for Semi-Finished Products, Bars, Rods, Wire, Sections and Bright Products of Corrosion Resisting Steels for General Purposes
Classification Precipitation-Hardening Stainless Steel
Properties Corrosion Resistance
Density 7.8 g/cm3
X7CrNiAl 17-7 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
① Elements not quoted in this table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All precautions are to be taken to avoid the addition of such elements from scrap and other materials used in production which would impair mechanical properties and the suitability of the steel.
X7CrNiAl 17-7 Mechanical Properties
condition Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
%
Bar, Rod, Wire, Profile, Bright Products; d≤30 +AT ≤850 ≤255
Cold drawn wire; d≥0.05 +C500 500~700
Cold drawn wire; d≥0.05 +C600 600~800
Cold drawn wire; d≥0.05 +C700 700~900
Cold drawn wire; d≥0.05 +C800 800~1000
Cold drawn wire; d≥0.05 +C900 900~1100
Cold drawn wire; d≥0.05 +C1000 1000~1250
Cold drawn wire; d≥0.05 +C1100 1100~1350
Cold drawn wire; d≥0.05 +C1200 1200~1450
Cold drawn wire; d≥0.05 +C1400 1400~1700
Cold drawn wire; d≥0.05 +C1600 1600~1900
Cold drawn wire; d≥0.05 +C1800 1800~2100
Cold drawn wire; 0.5<d≤1 +AT ≤1100 ≥10
Cold drawn wire; 1<d≤3 +AT ≤1050 ≥10
Cold drawn wire; 3<d≤5 +AT ≤1000 ≥10
Cold-drawn wire; 5<d≤16 +AT ≤950 ≥15
+AT=solution annealed；+A=annealed；+QT = quenched and tempered；+P=precipitation hardening；+C=Cold worked，+Csuffix followed by a number represents the tensile strength grade, i.e., the minimum tensile strength value.
long.=longitudinal；tr.=transverse
d=diameter or thickness；Unit mm
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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