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
Cu
<=0.17
0.10-0.35
0.40-1.00
<=0.045
<=0.045
<=0.25
<=0.35
<=0.30
Mechanical Properties
Tensile Strength
360-480 MPa
Yield Strength
>=215 MPa (0.2 % proof stress)
Elongation
>=24%
Condition
Seamless pipe and pipe with seam, N, thickness - (first row of Table 3)
More data from IS 1570 (Part 7):1992
From the standard
Mechanical properties at room temperature1 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
Seamless pipe and pipe with seam
N
-
-
215
360
480
24
-
4a
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
Seamless pipes and pipe with seam, HF, N, up to 40 mm
187
176
165
145
122
111
109
107
For guidance only.
Source: IS 1570 (Part 7):1992, Table 4
Heat treatment4 entries
Normalising temperature (HF, N)
880 to 940 deg C
Normalising time
1 to 2 min per 1 mm thickness of pipe wall but not less than 20 min
Normalising cooling
in quiet air
Stress relief or tempering after bending or welding
600 to 650 deg C, 2 min per 1 mm or thickness of pipe wall 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
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