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BS 970 EN42D vs IS 3431 50Cr4V2

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

BS 970 EN42D (BS 970:1955) and IS 3431 50Cr4V2 (IS 3431:1982) are both steel grades. Both fall under the Spring Steel category. BS 970 EN42D 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 EN42D vs IS 3431 50Cr4V2 is a 72.7% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With BS 970 EN42D:
EN 10089 55Cr3 BS 970 EN42C BS 970 EN42G IS 5517 55Cr3 IS 3195 113C6 IS 3195 50Cr4V2 EN 10089 50CrV4 EN 10083-3 51CrV4 EN 10083-1 51CrV4 IS 3195 52Cr4Mo2V BS 970 EN42 EN 10083-1 51CrV4
Match Breakdown
CHEMISTRY MATCH
72.7%
MECHANICAL MATCH
No shared data
OVERALL
35%
Specifications
Property BS 970 EN42D IS 3431 50Cr4V2
Standard BS 970:1955 IS 3431:1982
Category Spring Steel Spring Steel
C (%) 0.80-0.90 0.45-0.55
Si (%) <=0.35 0.15-0.35
Mn (%) 0.55-0.80 0.50-0.80
S (%) <=0.050 <=0.045
P (%) <=0.050 <=0.045
Cr (%) Not specified 0.90-1.20
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 EN42D 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 EN42D
Not documented
IS 3431 50Cr4V2
valve springs,high performance automotive springs,aerospace springs,coil springs,torsion bars
Key Differences
Can BS 970 EN42D Be Substituted With IS 3431 50Cr4V2?
BS 970 EN42D and IS 3431 50Cr4V2 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.
Forms & Sizes Available on M-EX
BS 970 EN42D
No active listings currently.
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 EN42D
0 active listings and RFQs →
IS 3431 50Cr4V2
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN42D and IS 3431 50Cr4V2?
IS 3431 50Cr4V2 specifies Cr, V which are not specified for BS 970 EN42D.
Can BS 970 EN42D be substituted with IS 3431 50Cr4V2?
BS 970 EN42D and IS 3431 50Cr4V2 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.