IS 6603:2024 X02Cr25Ni7Mo4N Steel: Specifications & Listings
IS 6603:2024 X02Cr25Ni7Mo4N: X02Cr25Ni7Mo4N: austenitic-ferritic (duplex) corrosion resisting stainless steel, numerical symbol 2507. 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
<=0.030
<=1.00
<=2.00
<=0.035
<=0.015
24.0-26.0
3.0-4.5
6.0-8.0
0.24-0.35
Mechanical Properties
Tensile Strength
>=730 MPa
Yield Strength
>=530 MPa
Elongation
>=25%
Hardness
<=290 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
290
530
730
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 annealed2 rows
Thickness or diameter (mm)
Rp0.2 min (MPa)
Rm (MPa)
A5 min (%)
KV2 min (J)
up to 50.8
550
800
15
-
over 50.8
515
760
15
-
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
450
150
420
200
400
250
380
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
1040 to 1120 deg C
Cooling after solution annealing
water
Informative guideline (Annex A).
Source: IS 6603:2024, Table 21
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