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EN 10088-3:2014 X7CrNiAl17-7 Steel: Specifications & Listings

EN 10088-3:2014 X7CrNiAl17-7: X7CrNiAl17-7: precipitation hardening corrosion resisting stainless steel, material number 1.4568. Specified in EN 10088-3:2014.

Category: Stainless Steel
Grade Details
GradeEN 10088-3:2014 X7CrNiAl17-7
Standard EN 10088-3:2014
ApplicationsGeneral purposes, semi-finished products, bars, rods, wire, sections and bright products
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
ASTM A959 631 ASTM A959:2011 USA No activity yet
IS 6603 X07Cr17Ni7Al IS 6603:2024 India No activity yet
EN 10088-1 X7CrNiAl17-7 EN 10088-1:2014 Europe (CEN) No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
IS 6603 X07Cr17Ni7Al IS 6603:2024 Strong Match
EN 10088-1 X7CrNiAl17-7 EN 10088-1:2014 Strong Match
EN 10088-1 X7CrNiAl17-7 EN 10088-1:2023 Strong Match
ASTM A959 631 ASTM A959:2011 Strong Match
EN 10088-1 X5CrNi17-7 EN 10088-1:2014 Close Alternative
ASTM A959 301 ASTM A959:2011 Close Alternative
ASTM A959 635 ASTM A959:2011 Close Alternative
BS 970 (Part 3) 304S31 BS 970 (Part 3):1991 Close Alternative
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C Si Mn P S Cr Ni Al
<=0.09 <=0.70 <=1.00 <=0.040 <=0.015 16.0-18.0 6.5-7.8 0.70-1.50
Mechanical Properties
Tensile Strength <=850 MPa
Hardness <=255 HB
Condition Solution annealed (+AT), conditions 1C, 1E, 1D, 1X, 1G and 2D, thickness or diameter up to 30 mm; hardness for guidance only

More data from EN 10088-3:2014

From the standard
Mechanical properties by heat treatment condition 1 conditions
ConditionHardness HBW, max (guidance)Rp0.2 min (MPa)Rm (MPa)A min, longitudinal (%)KV2 min, longitudinal (J)
+AT255-max. 850--
Thickness or diameter up to 30 mm; +AT = solution annealed, +P = precipitation hardened.
Source: EN 10088-3:2014, Table 12
Wire in cold worked (2H) and annealed (2D) condition 15 rows
ConditionWire diameter d (mm)Tensile strength (MPa)Elongation min (%)
2H +C5000.05 and above500 to 700-
2H +C6000.05 and above600 to 800-
2H +C7000.05 and above700 to 900-
2H +C8000.05 and above800 to 1000-
2H +C9000.05 and above900 to 1100-
2H +C10000.05 and above1000 to 1250-
2H +C11000.05 and above1100 to 1350-
2H +C12000.05 and above1200 to 1450-
2H +C14000.05 and above1400 to 1700-
2H +C16000.05 and above1600 to 1900-
2H +C18000.05 and above1800 to 2100-
2D +ATover 0.50 to 1.00max. 110010
2D +ATover 1.00 to 3.00max. 105010
2D +ATover 3.00 to 5.00max. 100010
2D +ATover 5.00 to 16.00max. 95015
2H levels: elongation depends on diameter and is to be agreed; 2D: tensile strength is maximum.
Source: EN 10088-3:2014, Table 18 and 19
Hot forming and heat treatment 1 conditions
ConditionSolution annealing temperature (deg C)Cooling after solution annealingPrecipitation hardening
+AT1060 to 1080water, air-
Hot forming 1150 to 900 deg C, cooling: air. Informative guideline.
Source: EN 10088-3:2014, Table A.5

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