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
<=0.050
<=1.00
<=2.00
<=0.035
<=0.015
25.0-28.0
1.30-2.00
4.5-6.5
0.05-0.20
Mechanical Properties
Tensile Strength
>=620 MPa
Yield Strength
>=450 MPa
Elongation
>=20%
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
450
620
20
85
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 annealed5 rows
Thickness or diameter (mm)
Rp0.2 min (MPa)
Rm (MPa)
A5 min (%)
KV2 min (J)
up to 10
610
770 to 1030
12
-
over 10 to 16
560
770 to 1030
12
-
over 16 to 40
460
620 to 950
15
85
over 40 to 63
460
620 to 950
15
85
over 63 to 160
460
620 to 880
20
85
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
360
150
335
200
310
250
295
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 950 deg C
Cooling after hot forming
air
Heat treatment symbol
+AT
Solution annealing temperature
1020 to 1100 deg C
Cooling after solution annealing
water, air
Informative guideline (Annex A).
Source: IS 6603:2024, Table 21
Active IS 6603:2024 X03Cr27Ni5Mo2N Listings on M-EX (For Sale)