Minimal Match — 35% match
based on chemical composition and mechanical property overlap.
IS 3431 65Si7 (IS 3431:1982) and EN 10089 50CrV4 (EN 10089:2002) 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 EN 10089 50CrV4 is commonly used for valve springs, high duty coil springs, hand tools.
IS 3431 65Si7 is defined under Bureau of Indian Standards (IS), originating from India, while EN 10089 50CrV4 is defined under European Standard (EN), originating from Europe.
As per chemical composition, IS 3431 65Si7 vs EN 10089 50CrV4 is a 66.1% match.
As per mechanical properties, the match is 0%.
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
EN 10089 50CrV4
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)
Not specified
Tensile Strength (quenched and tempered)
1370-1620 MPa
Not specified
Yield Stress (quenched and tempered)
>=1180 MPa
Not specified
Tensile Strength
Not specified
1100–1300 MPa
Yield Strength
Not specified
≥1000 MPa
Elongation
Not specified
≥8%
Hardness
Not specified
321–375 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)
EN 10089 50CrV4
Valve springs, high duty coil springs, hand tools
Key Differences
IS 3431 65Si7 specifies P, S which are not specified for EN 10089 50CrV4.
EN 10089 50CrV4 specifies Cr, V which are not specified for IS 3431 65Si7.
Can IS 3431 65Si7 Be Substituted With EN 10089 50CrV4?
IS 3431 65Si7 and EN 10089 50CrV4 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 EN 10089 50CrV4?
IS 3431 65Si7 specifies P, S which are not specified for EN 10089 50CrV4. EN 10089 50CrV4 specifies Cr, V which are not specified for IS 3431 65Si7.
Can IS 3431 65Si7 be substituted with EN 10089 50CrV4?
IS 3431 65Si7 and EN 10089 50CrV4 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.