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
Mo
V
N
0.08-0.16
<=0.35
0.50-0.90
<=0.040
<=0.030
11.0-12.5
2.0-3.0
1.5-2.00
0.25-0.40
0.02-0.04
Mechanical Properties
Tensile Strength
930-1130 MPa
Yield Strength
>=785 MPa (0.2 % proof stress)
Elongation
>=14%
Condition
Bars, forgings, Q+T, thickness up to 150 (first row of Table 3)
More data from IS 1570 (Part 7):1992
From the standard
Mechanical properties at room temperature2 rows
Product
Heat treatment
Thickness (mm)
Hardness (RB)
Rp0.2 min (MPa)
Rm min (MPa)
Rm max (MPa)
Elongation min (%)
KV (J)
Bend test D max
Bars, forgings
Q+T
up to 150
285-331
785
930
1130
14
40
-
Plates
Q+T
over 0.5 to 6
280-330
785
930
1130
10
-
-
Rm and elongation printed once for a group of thickness rows are repeated on each row; Rp0.2 'Note 8' is printed as in the standard; in case of dispute the tensile strength value is deciding.
Source: IS 1570 (Part 7):1992, Table 3
0.2 % proof stress at elevated temperature (guidance only)Rp0.2 min in MPa
Product, heat treatment, thickness
100 deg C
200 deg C
300 deg C
400 deg C
450 deg C
500 deg C
550 deg C
600 deg C
Bars, forgings, plates, Q+T
680
655
650
610
560
505
400
250
For guidance only.
Source: IS 1570 (Part 7):1992, Table 4
Heat treatment3 entries
Quenching temperature (Q+T)
1035 to 1065 deg C
Quenching medium
oil
Tempering temperature after quenching
600 to 700 deg C
Indications are for guidance only except where test samples are reference heat treated; stress relief temperature should be at least 30 deg C below the tempering temperature.
Source: IS 1570 (Part 7):1992, Table 5
Active IS 1570 (Part 7):1992 12Cr12Ni2Mo Listings on M-EX (For Sale)