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BS 970 EN45 vs IS 3431 60Si7

Strong Match — 92% match based on chemical composition and mechanical property overlap.

BS 970 EN45 (BS 970:1955) and IS 3431 60Si7 (IS 3431:1982) are both steel grades. Both fall under the Spring Steel category. BS 970 EN45 is typically used for leaf springs, coil springs, automotive suspension, while IS 3431 60Si7 is commonly used for heavy duty leaf springs,suspension springs,automotive springs,railway springs,high stress spring components. BS 970 EN45 is defined under British Standards (BS), originating from United Kingdom, while IS 3431 60Si7 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, BS 970 EN45 vs IS 3431 60Si7 is a 92% 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 92%.

Frequently Compared With BS 970 EN45:
EN 10089 55Si7 EN 10089 50CrV4 IS 3431 55Si7 EN 10083-3 51CrV4 EN 10089 55Cr3 GB/T 1222 55CrMnA IS 1570 (Part 4) 55Si7 IS 1570 (Part 4) 60Si7 IS 1570 (Part 4) 65Si7 IS 4367 55Si7 IS 3195 113C6 IS 3431 50Cr4V2
Match Breakdown
CHEMISTRY MATCH
92%
MECHANICAL MATCH
No shared data
OVERALL
92%
Specifications
Property BS 970 EN45 IS 3431 60Si7
Standard BS 970:1955 IS 3431:1982
Category Spring Steel Spring Steel
C (%) 0.50-0.60 0.55-0.65
Si (%) 1.50-2.00 1.50-2.00
Mn (%) 0.70-1.00 0.80-1.00
S (%) <=0.050 <=0.045
P (%) <=0.050 <=0.045
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 EN45 IS 3431 60Si7
Core Hardness After Quenching Not specified >=54 HRC (oil, up to 20 mm round / 16 mm flat)
Elongation (quenched and tempered) Not specified >=6%
Hardness, soft annealed Not specified <=255 HB
Hardness, untreated (hot rolled) Not specified about 310 HB (reference value)
Tensile Strength (quenched and tempered) Not specified 1320-1570 MPa
Yield Stress (quenched and tempered) Not specified >=1130 MPa
Typical Applications
BS 970 EN45
Leaf springs, coil springs, automotive suspension
IS 3431 60Si7
heavy duty leaf springs,suspension springs,automotive springs,railway springs,high stress spring components
Can BS 970 EN45 Be Substituted With IS 3431 60Si7?
BS 970 EN45 and IS 3431 60Si7 overlap closely enough on chemistry and mechanical properties that IS 3431 60Si7 is often considered as a substitute for BS 970 EN45 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
BS 970 EN45
Round Bar → (6 listings)
Diameter: 55–60 mm (2.17–2.36 in)
Length: 5200–6200 mm (204.72–244.09 in)
Flat Bar → (3 listings)
Thickness: 25–25 mm (0.98–0.98 in)
Width: 150–150 mm (5.91–5.91 in)
Length: 2500–3600 mm (98.43–141.73 in)
IS 3431 60Si7
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5700–6200 mm (224.41–244.09 in)
On M-EX Right Now
BS 970 EN45
9 active listings and RFQs →
IS 3431 60Si7
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN45 and IS 3431 60Si7?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN45 be substituted with IS 3431 60Si7?
BS 970 EN45 and IS 3431 60Si7 overlap closely enough on chemistry and mechanical properties that IS 3431 60Si7 is often considered as a substitute for BS 970 EN45 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.