Strong Match — 86.8% match
based on chemical composition and mechanical property overlap.
BS 970 EN47 (BS 970:1955) and IS 3431 50Cr4V2 (IS 3431:1982) are both steel grades.
Both fall under the Spring Steel category.
BS 970 EN47 is typically used for coil springs, leaf springs, torsion bars, valve springs, suspension springs, industrial springs requiring high fatigue life., while IS 3431 50Cr4V2 is commonly used for valve springs,high performance automotive springs,aerospace springs,coil springs,torsion bars.
BS 970 EN47 is defined under British Standards (BS), originating from United Kingdom, while IS 3431 50Cr4V2 is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, BS 970 EN47 vs IS 3431 50Cr4V2 is a 86.8% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a strong match overall at 86.8%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
BS 970 EN47
IS 3431 50Cr4V2
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
<=245 HB
Hardness, untreated (hot rolled)
Not specified
above 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
BS 970 EN47
Coil springs, leaf springs, torsion bars, valve springs, suspension springs, industrial springs requiring high fatigue life.
Can BS 970 EN47 Be Substituted With IS 3431 50Cr4V2?
BS 970 EN47 and IS 3431 50Cr4V2 overlap closely enough on chemistry and mechanical properties that IS 3431 50Cr4V2 is often considered as a substitute for BS 970 EN47 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
What is the difference between BS 970 EN47 and IS 3431 50Cr4V2?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN47 be substituted with IS 3431 50Cr4V2?
BS 970 EN47 and IS 3431 50Cr4V2 overlap closely enough on chemistry and mechanical properties that IS 3431 50Cr4V2 is often considered as a substitute for BS 970 EN47 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.