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BS 970 EN45A vs IS 1570 (Part 4) 55Si7

Strong Match — 89.3% match based on chemical composition and mechanical property overlap.

BS 970 EN45A (BS 970:1955) and IS 1570 (Part 4) 55Si7 (IS 1570 (Part 4):1988) are both steel grades. Both fall under the Spring Steel category. BS 970 EN45A is defined under British Standards (BS), originating from United Kingdom, while IS 1570 (Part 4) 55Si7 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, BS 970 EN45A vs IS 1570 (Part 4) 55Si7 is a 89.3% 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 89.3%.

Frequently Compared With BS 970 EN45A:
IS 3195 60Si7 EN 10089 55Si7 IS 1570 (Part 4) 60Si7 IS 3431 60Si7 IS 3195 113C6 IS 3431 50Cr4V2 EN 10089 50CrV4 EN 10083-1 51CrV4 EN 10083-3 51CrV4 IS 1570 (Part 4) 65Si7 IS 3195 50Cr4V2 EN 10083-1 51CrV4
Match Breakdown
CHEMISTRY MATCH
89.3%
MECHANICAL MATCH
No shared data
OVERALL
89.3%
Specifications
Property BS 970 EN45A IS 1570 (Part 4) 55Si7
Standard BS 970:1955 IS 1570 (Part 4):1988
Category Spring Steel Spring Steel
C (%) 0.55-0.65 0.50-0.60
Si (%) 1.70-2.00 1.50-2.00
Mn (%) 0.70-1.00 0.80-1.00
S (%) <=0.050 Not specified
P (%) <=0.050 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Key Differences
Can BS 970 EN45A Be Substituted With IS 1570 (Part 4) 55Si7?
BS 970 EN45A and IS 1570 (Part 4) 55Si7 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 4) 55Si7 is often considered as a substitute for BS 970 EN45A in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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BS 970 EN45A
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IS 1570 (Part 4) 55Si7
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Frequently Asked Questions
What is the difference between BS 970 EN45A and IS 1570 (Part 4) 55Si7?
BS 970 EN45A specifies S, P which are not specified for IS 1570 (Part 4) 55Si7.
Can BS 970 EN45A be substituted with IS 1570 (Part 4) 55Si7?
BS 970 EN45A and IS 1570 (Part 4) 55Si7 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 4) 55Si7 is often considered as a substitute for BS 970 EN45A in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.