IS 6603:2024 X02Cr23Ni4N Steel: Specifications & Listings
IS 6603:2024 X02Cr23Ni4N: X02Cr23Ni4N: austenitic-ferritic (duplex) corrosion resisting stainless steel, numerical symbol 2304. Specified in IS 6603:2024.
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
Cu
<=0.030
<=1.00
<=2.00
<=0.035
<=0.015
22.0-24.5
0.10-0.60
3.5-5.5
0.05-0.20
0.10-0.60
Mechanical Properties
Tensile Strength
>=600 MPa
Yield Strength
>=400 MPa
Elongation
>=25%
Hardness
<=260 HB
Condition
Solution annealed, conditions 1C, 1E, 1D, 1X, 1G and 2D, thickness or diameter up to 160 mm; Tensile Strength is a minimum as printed, hardness for guidance only
More data from IS 6603:2024
From the standard
Mechanical properties by thickness or diameter1 size range
Thickness or diameter (mm)
Hardness HB (guidance)
Rp0.2 min (MPa)
Rm min (MPa)
A min (%)
KV2 min (J)
up to 160
260
400
600
25
100
Solution annealed, conditions 1C, 1E, 1D, 1X, 1G and 2D; for rods only the tensile strength values apply.
Source: IS 6603:2024, Table 6
Bright bars, solution annealed1 rows
Thickness or diameter (mm)
Rp0.2 min (MPa)
Rm (MPa)
A5 min (%)
KV2 min (J)
all sizes
400
600
25
-
Bright bars, conditions 2H, 2B, 2G or 2P; A5 valid for 5 mm and above.
Source: IS 6603:2024, Table 16
Proof strength at elevated temperature4 temperatures
Temperature (deg C)
Rp0.2 min (MPa)
100
330
150
300
200
280
250
265
Minimum values, solution annealed (+AT); for guidance only.
Source: IS 6603:2024, Table 11
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
950 to 1050 deg C
Cooling after solution annealing
water, air
Informative guideline (Annex A).
Source: IS 6603:2024, Table 21
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