EN 10088-3:2014 X8CrNiS18-9 Steel: Specifications & Listings

EN 10088-3:2014 X8CrNiS18-9: X8CrNiS18-9: austenitic corrosion resisting stainless steel, material number 1.4305. Specified in EN 10088-3:2014.

Category: Stainless Steel
Grade Details
GradeEN 10088-3:2014 X8CrNiS18-9
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
IS 6603 X10Cr18Ni9S IS 6603:2024 India No activity yet
EN 10088-1 X8CrNiS18-9 EN 10088-1:2014 Europe (CEN) No activity yet
EN 10088-2 X8CrNiS18-9 EN 10088-2:2014 Europe No activity yet
BS 970 (Part 3) 303S31 BS 970 (Part 3):1991 UK No activity yet
ASTM A959 302 ASTM A959:2011 USA No activity yet
BS 970 (Part 3) 302S31 BS 970 (Part 3):1991 UK No activity yet
BS 970 (Part 3) 325S31 BS 970 (Part 3):1991 UK No activity yet
BS 970 (Part 3) 303S42 BS 970 (Part 3):1991 UK No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
EN 10088-1 X8CrNiS18-9 EN 10088-1:2014 Strong Match
EN 10088-1 X8CrNiS18-9 EN 10088-1:2023 Strong Match
EN 10088-2 X8CrNiS18-9 EN 10088-2:2014 Strong Match
IS 6603 X10Cr18Ni9S IS 6603:2024 Strong Match
BS 970 (Part 3) 303S31 BS 970 (Part 3):1991 Strong Match
ASTM A959 302 ASTM A959:2011 Strong Match
BS 970 (Part 3) 302S31 BS 970 (Part 3):1991 Strong Match
BS 970 (Part 3) 325S31 BS 970 (Part 3):1991 Strong Match
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 N Cu
<=0.10 <=1.00 <=2.00 <=0.045 0.15-0.35 17.0-19.0 8.0-10.0 <=0.10 <=1.00
Mechanical Properties
Tensile Strength 500-750 MPa
Yield Strength >=190 MPa
Elongation >=35%
Hardness <=230 HB
Condition Solution annealed (+AT), conditions 1C, 1E, 1D, 1X, 1G and 2D, thickness or diameter up to 160 mm; Yield Strength is Rp0.2, Elongation is A (longitudinal), hardness for guidance only

More data from EN 10088-3:2014

From the standard
Mechanical properties by thickness or diameter 1 size range
Thickness or diameter (mm)Hardness HBW, max (guidance)Rp0.2 min (MPa)Rp1.0 min (MPa)Rm (MPa)A min, longitudinal (%)A min, transverse (%)KV2 min, longitudinal (J)KV2 min, transverse (J)
up to 160230190225500 to 75035---
Solution annealed, conditions 1C, 1E, 1D, 1X, 1G and 2D; for rods only the tensile strength values apply.
Source: EN 10088-3:2014, Table 8
Bright bars, solution annealed 5 size ranges
Thickness or diameter (mm)Rp0.2 min (MPa)Rm (MPa)A5 min, longitudinal (%)A5 min, transverse (%)KV2 min, longitudinal (J)KV2 min, transverse (J)
up to 10400600 to 95015---
over 10 to 16400600 to 95015---
over 16 to 40190500 to 85020---
over 40 to 63190500 to 85020---
over 63 to 160190500 to 75035---
Bright bars, conditions 2H, 2B, 2G or 2P, including cut lengths from wire; A5 valid for 5 mm and above.
Source: EN 10088-3:2014, Table 13
Bars in cold work hardened condition (2H) 2 levels
Tensile strength levelRp0.2 min (MPa)Rm (MPa)A min (%)Max diameter (mm), to be agreed
+C700350700 to 85020not above 35
+C800500800 to 100012not above 25
Maximum diameter for each level is to be agreed at the time of enquiry and order.
Source: EN 10088-3:2014, Table 25
Wire in cold worked (2H) and annealed (2D) condition 18 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 0.05 to 0.10max. 110020
2D +ATover 0.10 to 0.20max. 105020
2D +ATover 0.20 to 0.50max. 100030
2D +ATover 0.50 to 1.00max. 95030
2D +ATover 1.00 to 3.00max. 90030
2D +ATover 3.00 to 5.00max. 85035
2D +ATover 5.00 to 16.00max. 80035
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 solution annealing guideline temperatures
Hot forming temperature
1200 to 900 deg C
Cooling after hot forming
air
Heat treatment symbol
+AT
Solution annealing temperature
1000 to 1100 deg C
Cooling after solution annealing
water, air
Informative guideline; cooling must be rapid enough to avoid intergranular corrosion.
Source: EN 10088-3:2014, Table A.1

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