Strong Match — 95.9% match
based on chemical composition and mechanical property overlap.
IS 3195 55Si7 (IS 3195:1992) and BS 970 EN45 (BS 970:1955) are both steel grades.
Both fall under the Spring Steel category.
IS 3195 55Si7 is typically used for volute and helical springs for railway rolling stock; flats and rounds, springs worked hot and heat-treated (clause 1.1, foreword), while BS 970 EN45 is commonly used for leaf springs, coil springs, automotive suspension.
IS 3195 55Si7 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 EN45 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, IS 3195 55Si7 vs BS 970 EN45 is a 95.9% 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 95.9%.
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 EN45
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 EN45
Leaf springs, coil springs, automotive suspension
Can IS 3195 55Si7 Be Substituted With BS 970 EN45?
IS 3195 55Si7 and BS 970 EN45 overlap closely enough on chemistry and mechanical properties that BS 970 EN45 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.
What is the difference between IS 3195 55Si7 and BS 970 EN45?
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 EN45?
IS 3195 55Si7 and BS 970 EN45 overlap closely enough on chemistry and mechanical properties that BS 970 EN45 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.