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IS 3195 55Si7 vs BS 970 EN45A

Strong Match — 87% match based on chemical composition and mechanical property overlap.

IS 3195 55Si7 (IS 3195:1992) and BS 970 EN45A (BS 970:1955) are both steel grades. Both fall under the Spring Steel category. IS 3195 55Si7 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 EN45A is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 3195 55Si7 vs BS 970 EN45A is a 87% 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%.

Frequently Compared With IS 3195 55Si7:
IS 3431 55Si7 IS 5517 55Cr3 IS 1570 (Part 4) 55Si7 EN 10089 50CrV4 IS 3431 50Cr4V2 IS 4367 55Si7 IS 1570 (Part 4) 60Si7 IS 3195 113C6 IS 3195 52Cr4Mo2V IS 1570 (Part 4) 65Si7 EN 10083-3 51CrV4 IS 3195 50Cr4V2
Match Breakdown
CHEMISTRY MATCH
87%
MECHANICAL MATCH
No shared data
OVERALL
87%
Specifications
Property IS 3195 55Si7 BS 970 EN45A
Standard IS 3195:1992 BS 970:1955
Category Spring Steel Spring Steel
C (%) 0.50-0.60 0.55-0.65
Mn (%) 0.80-1.00 0.70-1.00
P (%) <=0.030 <=0.050
S (%) <=0.030 <=0.050
Si (%) 1.50-2.00 1.70-2.00
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 3195 55Si7 BS 970 EN45A
Hardness, annealed <=245 HB Not specified
Hardness, untreated (hot rolled) about 270 HB (for guidance only) Not specified
Typical Applications
IS 3195 55Si7
Volute and helical springs for railway rolling stock; flats and rounds, springs worked hot and heat-treated (clause 1.1, foreword)
BS 970 EN45A
Not documented
Can IS 3195 55Si7 Be Substituted With BS 970 EN45A?
IS 3195 55Si7 and BS 970 EN45A overlap closely enough on chemistry and mechanical properties that BS 970 EN45A is often considered as a substitute for IS 3195 55Si7 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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IS 3195 55Si7
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BS 970 EN45A
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Frequently Asked Questions
What is the difference between IS 3195 55Si7 and BS 970 EN45A?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 3195 55Si7 be substituted with BS 970 EN45A?
IS 3195 55Si7 and BS 970 EN45A overlap closely enough on chemistry and mechanical properties that BS 970 EN45A is often considered as a substitute for IS 3195 55Si7 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.