Related Material — 65.4% match
based on chemical composition and mechanical property overlap.
IS 3195 65Si7 (IS 3195:1992) and IS 3431 65Si7 (IS 3431:1982) are both steel grades.
Both fall under the Spring Steel category.
IS 3195 65Si7 is typically used for volute and helical springs for railway rolling stock; flats and rounds, springs worked hot and heat-treated (clause 1.1, foreword), while IS 3431 65Si7 is commonly used for volute, helical and laminated springs for automotive suspension; hot-rolled (also centreless ground or precision) bars and flats (clause 1.1).
IS 3195 65Si7 is defined under Bureau of Indian Standards (IS), originating from India, while IS 3431 65Si7 is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, IS 3195 65Si7 vs IS 3431 65Si7 is a 98.1% match.
As per mechanical properties, the match is 0%.
Combined, this makes them a related material overall at 65.4%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
IS 3195 65Si7
IS 3431 65Si7
Hardness, annealed
<=245 HB
Not specified
Hardness, untreated (hot rolled)
about 255 HB (for guidance only)
about 310 HB (reference value)
Core Hardness After Quenching
Not specified
>=54 HRC (oil, up to 25 mm round / 16 mm flat)
Elongation (quenched and tempered)
Not specified
>=6%
Hardness, soft annealed
Not specified
<=255 HB
Tensile Strength (quenched and tempered)
Not specified
1370-1620 MPa
Yield Stress (quenched and tempered)
Not specified
>=1180 MPa
Typical Applications
IS 3195 65Si7
Volute and helical springs for railway rolling stock; flats and rounds, springs worked hot and heat-treated (clause 1.1, foreword)
IS 3431 65Si7
Volute, helical and laminated springs for automotive suspension; hot-rolled (also centreless ground or precision) bars and flats (clause 1.1)
Can IS 3195 65Si7 Be Substituted With IS 3431 65Si7?
IS 3195 65Si7 and IS 3431 65Si7 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
What is the difference between IS 3195 65Si7 and IS 3431 65Si7?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 3195 65Si7 be substituted with IS 3431 65Si7?
IS 3195 65Si7 and IS 3431 65Si7 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.