Minimal Match — 35% match
based on chemical composition and mechanical property overlap.
IS 3431 55Si7 (IS 3431:1982) and EN 10083-3 51CrV4 (EN 10083-3:2006) are both steel grades.
Both fall under the Spring Steel category.
IS 3431 55Si7 is typically used for leaf springs,coil springs,automotive suspension springs,industrial springs,washer springs, while EN 10083-3 51CrV4 is commonly used for valve springs, clutch springs, high duty coil springs.
IS 3431 55Si7 is defined under Bureau of Indian Standards (IS), originating from India, while EN 10083-3 51CrV4 is defined under European Standard (EN), originating from Europe.
As per chemical composition, IS 3431 55Si7 vs EN 10083-3 51CrV4 is a 67.4% 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
IS 3431 55Si7
EN 10083-3 51CrV4
Core Hardness After Quenching
>=54 HRC (oil, up to 20 mm round / 16 mm flat)
Not specified
Elongation (quenched and tempered)
>=6%
Not specified
Hardness, soft annealed
<=245 HB
Not specified
Hardness, untreated (hot rolled)
about 270 HB (reference value)
Not specified
Tensile Strength (quenched and tempered)
1320-1570 MPa
Not specified
Yield Stress (quenched and tempered)
>=1130 MPa
Not specified
Condition
Not specified
Quenched and tempered (+QT), ruling section d <= 16 mm
Valve springs, clutch springs, high duty coil springs
Key Differences
EN 10083-3 51CrV4 specifies Cr, V which are not specified for IS 3431 55Si7.
Can IS 3431 55Si7 Be Substituted With EN 10083-3 51CrV4?
IS 3431 55Si7 and EN 10083-3 51CrV4 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 55Si7 and EN 10083-3 51CrV4?
EN 10083-3 51CrV4 specifies Cr, V which are not specified for IS 3431 55Si7.
Can IS 3431 55Si7 be substituted with EN 10083-3 51CrV4?
IS 3431 55Si7 and EN 10083-3 51CrV4 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.