IS 1570 (Part 7):1992 6Ni25Cr15Ti2MoVBH Steel: Specifications & Listings
IS 1570 (Part 7):1992 6Ni25Cr15Ti2MoVBH: 6Ni25Cr15Ti2MoVBH: steel for elevated temperature service (creep resisting steel). Specified in IS 1570 (Part 7):1992.
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
Ti
Al
B
0.03-0.08
<=1.00
<=2.00
<=0.045
<=0.030
13.5-16.00
24.00-27.00
1.00-1.50
0.10-0.50
1.9-2.30
<=0.35
0.003-0.010
Mechanical Properties
Tensile Strength
900-1100 MPa
Yield Strength
>=600 MPa (0.2 % proof stress)
Elongation
>=15%
Condition
Bars, forgings, pipes, plates, S+P, thickness over 5 to 250 (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
Bars, forgings, pipes, plates
S+P
over 5 to 250
248-341
600
900
1100
15
40
-
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
650 deg C
700 deg C
750 deg C
800 deg C
Pipes, bars, forgings, plates, S+P
590
570
555
535
520
510
490
465
425
375
305
225
For guidance only.
Source: IS 1570 (Part 7):1992, Table 4
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