EN 10088-2:2014 X2CrNiMoSi18-5-3 Steel: Specifications & Listings
EN 10088-2:2014 X2CrNiMoSi18-5-3: X2CrNiMoSi18-5-3: austenitic-ferritic (duplex) corrosion resisting stainless steel, material number 1.4424. Specified in EN 10088-2:2014.
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%
Condition
Solution annealed (+AT), cold rolled strip, up to 8 mm thick; Yield Strength is Rp0.2 (transverse), Elongation is A80 for under 3 mm thick
More data from EN 10088-2:2014
From the standard
Mechanical properties by product form and thickness3 product forms
Product form
Max thickness (mm)
Rp0.2 min (MPa)
Rm (MPa)
A80 min, under 3 mm thick (%)
A min, 3 mm and over (%)
Cold rolled strip
8
450
700 to 900
25
25
Hot rolled strip
13.5
450
700 to 900
25
25
Hot rolled plate
75
400
680 to 900
25
25
Solution annealed condition; proof strength is the minimum transverse value.
Source: EN 10088-2:2014, Table 8
Impact energy KV2 (ISO-V)3 rows
Product form
Max thickness (mm)
KV2 longitudinal, min (J)
KV2 transverse, min (J)
Cold rolled strip
8
100
60
Hot rolled strip
13.5
100
60
Hot rolled plate
75
100
60
Applies to products more than 10 mm thick, ISO-V notch, room temperature.
Source: EN 10088-2:2014, Table 8
Proof strength at elevated temperature4 temperatures
Temperature (deg C)
Rp0.2 min, +AT t <= 20 mm (MPa)
Rp0.2 min, +AT 20 < t <= 75 mm (MPa)
100
370
320
150
350
305
200
330
290
250
325
285
Minimum values, solution annealed (+AT).
Source: EN 10088-2:2014, Table 13
Hot forming and solution annealingguideline temperatures
Hot forming temperature
1150 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 10088-2:2014, Table A.2
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