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
Ni
0.08-0.15
<=1.0
<=1.0
<=0.040
<=0.030
11.5-13.5
<=1.0
Mechanical Properties
Tensile Strength
>=450 MPa
Yield Strength
>=205 MPa (0.2 % proof stress)
Elongation
>=20.0% (50 mm)
Hardness
<=217 HB; <=95 HRB
Condition
Annealed, quenched or solution treated plates, sheets and strips (Table 2)
More data from IS 1570 (Part 5):1985
From the standard
Annealed, quenched or solution treated plates, sheets and strips5 properties
Tensile strength, min
450 MPa
0.2 % proof stress, min
205 MPa
Elongation in 50 mm, min
20.0%
Brinell hardness, max
217 HB
Rockwell B hardness, max
95 HRB
Source: IS 1570 (Part 5):1985, Table 2
Annealed, quenched or solution treated bars and flats4 properties
Tensile strength, min
483 MPa
0.2 % proof stress, min
276 MPa
Elongation in 50 mm, min
20%
Reduction of area, min
45%
Source: IS 1570 (Part 5):1985, Table 3
Hardened and tempered properties3 properties
0.2 % proof stress, min
410 MPa
Tensile strength
590 to 780 MPa
Elongation, min
16%
Sheets, plates, strips and flats; gauge length 5.65 sqrt(So), flats 3 to 30 mm.
Source: IS 1570 (Part 5):1985, Table 4
Recommended heat treatment7 entries
Annealing temperature
700 to 780 deg C
Annealing cooling medium
air
Annealing temperature (second entry)
770 to 870 deg C
Annealing cooling medium (second entry)
furnace
Hardening temperature (Q+T)
950 to 1000 deg C
Hardening quenching medium
oil, air
Tempering temperature
700 to 750 deg C
A annealing, S softening, ST solution treatment, Q quenching, T tempering, P patenting.
Source: IS 1570 (Part 5):1985, Table 7
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