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
Al (metallic)
<=0.15
0.25-1.0
0.30-0.60
<=0.040
<=0.030
8.00-10.00
0.90-1.10
<=0.02
Mechanical Properties
Tensile Strength
410-560 MPa
Yield Strength
>=135 MPa (0.2 % proof stress)
Elongation
>=20%
Condition
Pipes, A, thickness - (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
Pipes
A
-
-
135
410
560
20
-
-
Pipes
N+T
-
-
390
590
740
18
-
-
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
Pipes, A
98
88
79
78
77
76
75
74
71
-
Pipes, N+T
363
348
334
330
326
322
316
311
290
235
For guidance only.
Source: IS 1570 (Part 7):1992, Table 4
Heat treatment7 entries
Annealing temperature (A)
850 to 950 deg C
Normalising temperature (N+T)
900 to 1000 deg C
Normalising time
1 to 2 min per 1 mm thickness of forging or pipe wall but not less than 20 min
Normalising cooling
air
Tempering temperature
700 to 800 deg C
Tempering time
1 to 3 min per 1 mm thickness but not less than 15 min
Stress relief or tempering after bending or welding
760 to 820 deg C, 2 min per 1 mm thickness but not less than 15 min
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 10Cr36Mo10H Listings on M-EX (For Sale)