Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
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
150 deg C
200 deg C
250 deg C
300 deg C
350 deg C
400 deg C
450 deg C
500 deg C
550 deg C
600 deg C
650 deg C
700 deg C
Pipes, bars, Q1
107
103
97
94
90
85
80
76
74
73
72
71
70
Forgings, Q2
148
144
139
134
130
124
119
114
111
107
104
101
99
For guidance only.
Source: IS 1570 (Part 7):1992, Table 4
Heat treatment3 entries
Quenching temperature (Q1)
1070 to 1140 deg C
Quenching temperature (Q2)
950 to 1070 deg C
Quenching medium
air, water, oil
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
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