IS 4367:1991 40Ni10Cr3Mo6 Steel: Specifications & Listings
IS 4367:1991 40Ni10Cr3Mo6: 40Ni10Cr3Mo6 is a steel in IS 4367:1991 (Alloy Steel Forgings for General Industrial Use), which covers forgings in the as forged, heat-treated or machined condition.
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
Ni
Cr
Mo
S
P
0.36-0.44
0.10-0.35
0.40-0.70
2.25-2.75
0.50-0.80
0.40-0.70
<=0.035
<=0.035
Mechanical Properties
Tensile Strength
1000-1150 MPa
Yield Strength
800 MPa min
Elongation
>=12%
Izod Impact
48 J min
Hardness
295-341 HB
Hardness (soft annealed)
<=250 HB
Condition
Hardened and tempered, ruling section up to 150 mm
More data from IS 4367:1991
From the standard
Properties by ruling section4 sections
Tensile strength (MPa)
Yield strength, min (MPa)
Elongation, min (%)
Izod impact, min (J)
Hardness (HB)
Limiting ruling section (mm)
1000 to 1150
800
12
48
295 to 341
150
1100 to 1250
880
11
41
325 to 370
150
1200 to 1350
1000
10
35
355 to 399
150
1550 Min
1300
8
15
450 Min
100
Test condition: hardened and tempered. Maximum hardness in the soft annealed condition: 250 HB.
Source: IS 4367:1991 with Amendments 1 and 2, Table 3
Sulphur, phosphorus and aluminium limitsordering options
Option 1
Sulphur and phosphorus 0.030 max each
Option 2
Sulphur 0.020 to 0.035, phosphorus 0.035 max
Aluminium, when the steel is aluminium killed
0.02 to 0.05
The purchaser orders sulphur and phosphorus under option 1 or option 2.
Source: IS 4367:1991 with Amendments 1 and 2, Table 1, notes 1 and 2
Active IS 4367:1991 40Ni10Cr3Mo6 Listings on M-EX (For Sale)