Close Alternative — 79.2% match
based on chemical composition and mechanical property overlap.
BS 970 EN50 (BS 970:1955) and IS 3431 50Cr4V2 (IS 3431:1982) are both steel grades.
Both fall under the Spring Steel category.
BS 970 EN50 is typically used for annealed wire for oil-hardened and tempered springs; covered by bs 1429., while IS 3431 50Cr4V2 is commonly used for valve springs,high performance automotive springs,aerospace springs,coil springs,torsion bars.
BS 970 EN50 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 EN50 vs IS 3431 50Cr4V2 is a 79.2% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a close alternative overall at 79.2%.
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 EN50
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 EN50
Annealed wire for oil-hardened and tempered springs; covered by BS 1429.
Can BS 970 EN50 Be Substituted With IS 3431 50Cr4V2?
BS 970 EN50 and IS 3431 50Cr4V2 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
What is the difference between BS 970 EN50 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 EN50 be substituted with IS 3431 50Cr4V2?
BS 970 EN50 and IS 3431 50Cr4V2 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.