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IS 1570 (Part 4) 55Si7 vs BS 970 EN45

Strong Match — 98.1% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 55Si7 (IS 1570 (Part 4):1988) and BS 970 EN45 (BS 970:1955) are both steel grades. Both fall under the Spring Steel category. IS 1570 (Part 4) 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 1570 (Part 4) 55Si7 vs BS 970 EN45 is a 98.1% 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 98.1%.

Frequently Compared With IS 1570 (Part 4) 55Si7:
IS 1570 (Part 4) 60Si7 EN 10089 55Si7 IS 3431 60Si7 EN 10083-3 51CrV4 IS 3431 55Si7 IS 3195 55Si7 EN 10089 50CrV4 IS 4367 55Si7 IS 1570 (Part 4) 65Si7 EN 10089 55Cr3 IS 3195 113C6 IS 3195 60Si7
Match Breakdown
CHEMISTRY MATCH
98.1%
MECHANICAL MATCH
No shared data
OVERALL
98.1%
Specifications
Property IS 1570 (Part 4) 55Si7 BS 970 EN45
Standard IS 1570 (Part 4):1988 BS 970:1955
Category Spring Steel Spring Steel
C (%) 0.50-0.60 0.50-0.60
Si (%) 1.50-2.00 1.50-2.00
Mn (%) 0.80-1.00 0.70-1.00
S (%) Not specified <=0.050
P (%) Not specified <=0.050
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Typical Applications
IS 1570 (Part 4) 55Si7
Not documented
BS 970 EN45
Leaf springs, coil springs, automotive suspension
Key Differences
Can IS 1570 (Part 4) 55Si7 Be Substituted With BS 970 EN45?
IS 1570 (Part 4) 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 1570 (Part 4) 55Si7 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
IS 1570 (Part 4) 55Si7
No active listings currently.
BS 970 EN45
Round Bar → (6 listings)
Diameter: 55–60 mm (2.17–2.36 in)
Length: 5200–6200 mm (204.72–244.09 in)
Flat Bar → (3 listings)
Thickness: 25–25 mm (0.98–0.98 in)
Width: 150–150 mm (5.91–5.91 in)
Length: 2500–3600 mm (98.43–141.73 in)
On M-EX Right Now
IS 1570 (Part 4) 55Si7
0 active listings and RFQs →
BS 970 EN45
9 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 55Si7 and BS 970 EN45?
BS 970 EN45 specifies S, P which are not specified for IS 1570 (Part 4) 55Si7.
Can IS 1570 (Part 4) 55Si7 be substituted with BS 970 EN45?
IS 1570 (Part 4) 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 1570 (Part 4) 55Si7 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.