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BS 970 EN48 vs IS 3431 50Cr4V2

Close Alternative — 84.7% match based on chemical composition and mechanical property overlap.

BS 970 EN48 (BS 970:1955) and IS 3431 50Cr4V2 (IS 3431:1982) are both steel grades. Both fall under the Spring Steel category. BS 970 EN48 is typically used for high duty springs, valve springs, while IS 3431 50Cr4V2 is commonly used for valve springs,high performance automotive springs,aerospace springs,coil springs,torsion bars. BS 970 EN48 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 EN48 vs IS 3431 50Cr4V2 is a 84.7% 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 84.7%.

Frequently Compared With BS 970 EN48:
EN 10089 50CrV4 EN 10083-3 51CrV4 EN 10089 55Cr3 EN 10089 55Si7 GB/T 1222 55CrMnA IS 3195 50Cr4V2 IS 3195 113C6 IS 3195 60Cr4V2 IS 5517 55Cr3 EN 10083-1 51CrV4 EN 10083-1 51CrV4 IS 3431 60Cr4V2
Match Breakdown
CHEMISTRY MATCH
84.7%
MECHANICAL MATCH
No shared data
OVERALL
84.7%
Specifications
Property BS 970 EN48 IS 3431 50Cr4V2
Standard BS 970:1955 IS 3431:1982
Category Spring Steel Spring Steel
C (%) 0.45-0.55 0.45-0.55
Si (%) 0.10-0.50 0.15-0.35
Mn (%) 0.50-0.80 0.50-0.80
Cr (%) 1.00-1.40 0.90-1.20
S (%) <=0.050 <=0.045
P (%) <=0.050 <=0.045
V (%) Not specified 0.15-0.30
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 EN48 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 EN48
High duty springs, valve springs
IS 3431 50Cr4V2
valve springs,high performance automotive springs,aerospace springs,coil springs,torsion bars
Key Differences
Can BS 970 EN48 Be Substituted With IS 3431 50Cr4V2?
BS 970 EN48 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.
Forms & Sizes Available on M-EX
BS 970 EN48
Flat Bar → (3 listings)
Thickness: 30–30 mm (1.18–1.18 in)
Width: 150–150 mm (5.91–5.91 in)
Length: 2500–2800 mm (98.43–110.24 in)
IS 3431 50Cr4V2
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6700–7000 mm (263.78–275.59 in)
On M-EX Right Now
BS 970 EN48
3 active listings and RFQs →
IS 3431 50Cr4V2
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN48 and IS 3431 50Cr4V2?
IS 3431 50Cr4V2 specifies V which is not specified for BS 970 EN48.
Can BS 970 EN48 be substituted with IS 3431 50Cr4V2?
BS 970 EN48 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.