Minimal Match — 35% match
based on chemical composition and mechanical property overlap.
IS 3431 65Si7 (IS 3431:1982) and IS 3195 50Cr4V2 (IS 3195:1992) are both steel grades.
Both fall under the Spring Steel category.
IS 3431 65Si7 is typically used for volute, helical and laminated springs for automotive suspension; hot-rolled (also centreless ground or precision) bars and flats (clause 1.1), while IS 3195 50Cr4V2 is commonly used for volute and helical springs for railway rolling stock; flats and rounds, springs worked hot and heat-treated (clause 1.1, foreword).
IS 3431 65Si7 is defined under Bureau of Indian Standards (IS), originating from India, while IS 3195 50Cr4V2 is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, IS 3431 65Si7 vs IS 3195 50Cr4V2 is a 62% match.
As per mechanical properties, the match is 100%.
Combined, this makes them a minimal match overall at 35%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
IS 3431 65Si7
IS 3195 50Cr4V2
Core Hardness After Quenching
>=54 HRC (oil, up to 25 mm round / 16 mm flat)
Not specified
Elongation (quenched and tempered)
>=6%
Not specified
Hardness, soft annealed
<=255 HB
Not specified
Hardness, untreated (hot rolled)
about 310 HB (reference value)
about 310 HB (for guidance only)
Tensile Strength (quenched and tempered)
1370-1620 MPa
Not specified
Yield Stress (quenched and tempered)
>=1180 MPa
Not specified
Hardness, annealed
Not specified
<=245 HB
Typical Applications
IS 3431 65Si7
Volute, helical and laminated springs for automotive suspension; hot-rolled (also centreless ground or precision) bars and flats (clause 1.1)
IS 3195 50Cr4V2
Volute and helical springs for railway rolling stock; flats and rounds, springs worked hot and heat-treated (clause 1.1, foreword)
Key Differences
IS 3195 50Cr4V2 specifies Cr, V which are not specified for IS 3431 65Si7.
Can IS 3431 65Si7 Be Substituted With IS 3195 50Cr4V2?
IS 3431 65Si7 and IS 3195 50Cr4V2 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 3431 65Si7 and IS 3195 50Cr4V2?
IS 3195 50Cr4V2 specifies Cr, V which are not specified for IS 3431 65Si7.
Can IS 3431 65Si7 be substituted with IS 3195 50Cr4V2?
IS 3431 65Si7 and IS 3195 50Cr4V2 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.