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BS 970 EN45A vs IS 4367 55Si7

Strong Match — 87.6% match based on chemical composition and mechanical property overlap.

BS 970 EN45A (BS 970:1955) and IS 4367 55Si7 (IS 4367:1991) 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 4367 55Si7 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, BS 970 EN45A vs IS 4367 55Si7 is a 87.6% 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 87.6%.

Frequently Compared With BS 970 EN45A:
IS 1570 (Part 4) 60Si7 IS 3195 60Si7 EN 10089 55Si7 IS 3431 60Si7 IS 3431 50Cr4V2 IS 3195 113C6 EN 10089 50CrV4 EN 10083-1 51CrV4 EN 10083-3 51CrV4 IS 1570 (Part 4) 55Si7 IS 1570 (Part 4) 65Si7 IS 3195 50Cr4V2
Match Breakdown
CHEMISTRY MATCH
87.6%
MECHANICAL MATCH
No shared data
OVERALL
87.6%
Specifications
Property BS 970 EN45A IS 4367 55Si7
Standard BS 970:1955 IS 4367:1991
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 <=0.035
P (%) <=0.050 <=0.035
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 EN45A IS 4367 55Si7
Tensile Strength Not specified 1300-1500 MPa
Hardness Not specified 380-440 HB
Hardness (soft annealed) Not specified <=245 HB
Condition Not specified Hardened and tempered, ruling section up to 100 mm
Can BS 970 EN45A Be Substituted With IS 4367 55Si7?
BS 970 EN45A and IS 4367 55Si7 overlap closely enough on chemistry and mechanical properties that IS 4367 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 4367 55Si7
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Frequently Asked Questions
What is the difference between BS 970 EN45A and IS 4367 55Si7?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN45A be substituted with IS 4367 55Si7?
BS 970 EN45A and IS 4367 55Si7 overlap closely enough on chemistry and mechanical properties that IS 4367 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.