EN 10088-3:2014 X2CrNiMoSi18-5-3 Steel: Specifications & Listings
EN 10088-3:2014 X2CrNiMoSi18-5-3: X2CrNiMoSi18-5-3: austenitic-ferritic (duplex) corrosion resisting stainless steel, material number 1.4424. Specified in EN 10088-3:2014.
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
Mo
Ni
N
<=0.030
1.40-2.00
1.20-2.00
<=0.035
<=0.015
18.0-19.0
2.50-3.0
4.5-5.2
0.05-0.10
Mechanical Properties
Tensile Strength
700-900 MPa
Yield Strength
>=450 MPa
Elongation
>=25%
Hardness
<=260 HB
Condition
Solution annealed (+AT), conditions 1C, 1E, 1D, 1X, 1G and 2D, thickness or diameter up to 50 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 diameter2 size ranges
Thickness or diameter (mm)
Hardness HBW, max (guidance)
Rp0.2 min (MPa)
Rm (MPa)
A min, longitudinal (%)
KV2 min, longitudinal (J)
up to 50
260
450
700 to 900
25
100
over 50 to 160
260
400
680 to 900
25
100
Solution annealed, conditions 1C, 1E, 1D, 1X, 1G and 2D; for rods only the tensile strength values apply.
Source: EN 10088-3:2014, Table 9
Proof strength at elevated temperature4 temperatures
Temperature (deg C)
Rp0.2 min, +AT (t <= 50 mm) (MPa)
Rp0.2 min, +AT (50 < t <= 160 mm) (MPa)
100
370
320
150
350
305
200
330
290
250
325
285
Minimum values.
Source: EN 10088-3:2014, Table 21
Hot forming and solution annealingguideline temperatures
Hot forming temperature
1200 to 1000 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 precipitation.
Source: EN 10088-3:2014, Table A.2
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