Close Alternative — 73.3% match
based on chemical composition and mechanical property overlap.
IS 4367 55Si7 (IS 4367:1991) and IS 3431 60Si7 (IS 3431:1982) are both steel grades.
Both fall under the Spring Steel category.
IS 4367 55Si7 is defined under Bureau of Indian Standards (IS), originating from India, while IS 3431 60Si7 is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, IS 4367 55Si7 vs IS 3431 60Si7 is a 93.2% match.
As per mechanical properties, the match is 33.3%.
Combined, this makes them a close alternative overall at 73.3%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
IS 4367 55Si7
IS 3431 60Si7
Tensile Strength
1300-1500 MPa
Not specified
Hardness
380-440 HB
Not specified
Hardness (soft annealed)
<=245 HB
Not specified
Condition
Hardened and tempered, ruling section up to 100 mm
Not specified
Core Hardness After Quenching
Not specified
>=54 HRC (oil, up to 20 mm round / 16 mm flat)
Elongation (quenched and tempered)
Not specified
>=6%
Hardness, soft annealed
Not specified
<=255 HB
Hardness, untreated (hot rolled)
Not specified
about 310 HB (reference value)
Tensile Strength (quenched and tempered)
Not specified
1320-1570 MPa
Yield Stress (quenched and tempered)
Not specified
>=1130 MPa
Typical Applications
IS 4367 55Si7
Not documented
IS 3431 60Si7
heavy duty leaf springs,suspension springs,automotive springs,railway springs,high stress spring components
Can IS 4367 55Si7 Be Substituted With IS 3431 60Si7?
IS 4367 55Si7 and IS 3431 60Si7 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
What is the difference between IS 4367 55Si7 and IS 3431 60Si7?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 4367 55Si7 be substituted with IS 3431 60Si7?
IS 4367 55Si7 and IS 3431 60Si7 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.