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
<=0.09
<=1.50
<=1.50
<=0.040
>=0.15
16.0-18.0
<=0.60
Mechanical Properties
Tensile Strength
>=430 MPa
Yield Strength
>=250 MPa
Elongation
>=20%
Hardness
<=200 HB
Condition
Annealed, conditions 1C, 1E, 1D, 1X, 1G and 2D, thickness or diameter up to 100 mm; Tensile Strength is a minimum as printed
More data from IS 6603:2024
From the standard
Mechanical properties by thickness or diameter1 size range
Thickness or diameter (mm)
Hardness HB
Rp0.2 min (MPa)
Rm min (MPa)
A min (%)
up to 100
200
250
430
20
Annealed, conditions 1C, 1E, 1D, 1X, 1G and 2D; for larger thicknesses the values have to be agreed.
Source: IS 6603:2024, Table 7
Bright bars, annealed5 rows
Thickness or diameter (mm)
Rp0.2 min (MPa)
Rm (MPa)
A5 min (%)
up to 10
330
530 to 780
7
over 10 to 16
310
500 to 780
7
over 16 to 40
250
430 to 730
12
over 40 to 63
250
430 to 730
12
over 63 to 100
250
430 to 630
20
Bright bars, conditions 2H, 2B, 2G or 2P; A5 valid for 5 mm and above.
Source: IS 6603:2024, Table 17
Hot forming and annealingguideline temperatures
Hot forming temperature
1100 to 800 deg C
Cooling after hot forming
air
Heat treatment symbol
+A
Annealing temperature
750 to 850 deg C
Cooling after annealing
air
Informative guideline (Annex A).
Source: IS 6603:2024, Table 22
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