Strong Match — 95.9% match
based on chemical composition and mechanical property overlap.
BS 970 EN45 (BS 970:1955) and IS 3195 55Si7 (IS 3195:1992) 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 3195 55Si7 is commonly used for volute and helical springs for railway rolling stock; flats and rounds, springs worked hot and heat-treated (clause 1.1, foreword).
BS 970 EN45 is defined under British Standards (BS), originating from United Kingdom, while IS 3195 55Si7 is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, BS 970 EN45 vs IS 3195 55Si7 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
BS 970 EN45
IS 3195 55Si7
Hardness, annealed
Not specified
<=245 HB
Hardness, untreated (hot rolled)
Not specified
about 270 HB (for guidance only)
Typical Applications
BS 970 EN45
Leaf springs, coil springs, automotive suspension
IS 3195 55Si7
Volute and helical springs for railway rolling stock; flats and rounds, springs worked hot and heat-treated (clause 1.1, foreword)
Can BS 970 EN45 Be Substituted With IS 3195 55Si7?
BS 970 EN45 and IS 3195 55Si7 overlap closely enough on chemistry and mechanical properties that IS 3195 55Si7 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.
What is the difference between BS 970 EN45 and IS 3195 55Si7?
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 3195 55Si7?
BS 970 EN45 and IS 3195 55Si7 overlap closely enough on chemistry and mechanical properties that IS 3195 55Si7 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.