Minimal Match — 35% match
based on chemical composition and mechanical property overlap.
EN 10083-1 51CrV4 (EN 10083-1:1996) and IS 3431 65Si7 (IS 3431:1982) are both steel grades.
Both fall under the Spring Steel category.
EN 10083-1 51CrV4 is typically used for quenched and tempered machine parts (clause 1.1), 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).
EN 10083-1 51CrV4 is defined under European Standard (EN), originating from Europe, while IS 3431 65Si7 is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, EN 10083-1 51CrV4 vs IS 3431 65Si7 is a 65.4% 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
EN 10083-1 51CrV4
IS 3431 65Si7
Condition
Quenched and tempered, ruling section d <= 16 mm
Not specified
Elongation
9% min
Not specified
Hardness
Soft annealed: 248 HB max
Not specified
Tensile Strength
1100 to 1300 MPa
Not specified
Yield Strength
900 MPa min
Not specified
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
Hardness, untreated (hot rolled)
Not specified
about 310 HB (reference value)
Tensile Strength (quenched and tempered)
Not specified
1370-1620 MPa
Yield Stress (quenched and tempered)
Not specified
>=1180 MPa
Typical Applications
EN 10083-1 51CrV4
Quenched and tempered machine parts (clause 1.1)
IS 3431 65Si7
Volute, helical and laminated springs for automotive suspension; hot-rolled (also centreless ground or precision) bars and flats (clause 1.1)
Key Differences
EN 10083-1 51CrV4 specifies Cr, V which are not specified for IS 3431 65Si7.
Can EN 10083-1 51CrV4 Be Substituted With IS 3431 65Si7?
EN 10083-1 51CrV4 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 EN 10083-1 51CrV4 and IS 3431 65Si7?
EN 10083-1 51CrV4 specifies Cr, V which are not specified for IS 3431 65Si7.
Can EN 10083-1 51CrV4 be substituted with IS 3431 65Si7?
EN 10083-1 51CrV4 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.