EN 10088-3:2014 X2CrNiMo18-15-4 Steel: Specifications & Listings
EN 10088-3:2014 X2CrNiMo18-15-4: X2CrNiMo18-15-4: austenitic corrosion resisting stainless steel, material number 1.4438. 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
<=1.00
<=2.00
<=0.045
<=0.030
17.5-19.5
3.0-4.0
13.0-16.0
<=0.10
Mechanical Properties
Tensile Strength
500-700 MPa
Yield Strength
>=200 MPa
Elongation
>=40%
Hardness
<=215 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 diameter2 size ranges
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 160
215
200
235
500 to 700
40
-
100
-
over 160 to 250
215
200
235
500 to 700
-
30
-
60
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
Proof strength at elevated temperature10 temperatures
Temperature (deg C)
Rp0.2 min (MPa)
Rp1.0 min (MPa)
100
172
206
150
157
186
200
147
177
250
137
167
300
127
157
350
120
150
400
115
144
450
112
140
500
110
138
550
108
136
Minimum values, solution annealed (+AT).
Source: EN 10088-3:2014, Table 20
Hot forming and solution annealingguideline temperatures
Hot forming temperature
1150 to 850 deg C
Cooling after hot forming
air
Heat treatment symbol
+AT
Solution annealing temperature
1020 to 1120 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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