IS 4367:1991 37Mn5Si5 Steel: Specifications & Listings
IS 4367:1991 37Mn5Si5: 37Mn5Si5 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
S
P
0.33-0.41
1.10-1.40
1.10-1.40
<=0.035
<=0.035
Mechanical Properties
Tensile Strength
780-930 MPa
Yield Strength
590 MPa min
Elongation
>=14%
Hardness (soft annealed)
<=217 HB
Condition
Hardened and tempered
More data from IS 4367:1991
From the standard
Properties by ruling section1 section
Tensile strength (MPa)
Yield strength, min (MPa)
Elongation, min (%)
Izod impact, min (J)
Hardness (HB)
Limiting ruling section (mm)
780 to 930
590
14
Not specified
Not specified
Not specified
Test condition: hardened and tempered. Maximum hardness in the soft annealed condition: 217 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 37Mn5Si5 Listings on M-EX (For Sale)