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IS 4367 55Si7 vs BS 970 EN45

Strong Match — 96.5% match based on chemical composition and mechanical property overlap.

IS 4367 55Si7 (IS 4367:1991) and BS 970 EN45 (BS 970:1955) are both steel grades. Both fall under the Spring Steel category. IS 4367 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 4367 55Si7 vs BS 970 EN45 is a 96.5% 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 96.5%.

Frequently Compared With IS 4367 55Si7:
IS 3431 55Si7 IS 3431 60Si7 IS 1570 (Part 4) 55Si7 IS 5517 55Cr3 IS 1570 (Part 4) 60Si7 IS 1570 (Part 4) 65Si7 IS 3195 55Si7 EN 10089 55Cr3 IS 3431 65Si7 EN 10089 50CrV4 GB/T 1222 55CrMnA EN 10083-3 51CrV4
Match Breakdown
CHEMISTRY MATCH
96.5%
MECHANICAL MATCH
No shared data
OVERALL
96.5%
Specifications
Property IS 4367 55Si7 BS 970 EN45
Standard IS 4367:1991 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 (%) <=0.035 <=0.050
P (%) <=0.035 <=0.050
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 4367 55Si7 BS 970 EN45
Tensile Strength 1300-1500 MPa Not specified
Hardness 380-440 HB Not specified
Hardness (soft annealed) <=245 HB Not specified
Condition Hardened and tempered, ruling section up to 100 mm Not specified
Typical Applications
IS 4367 55Si7
Not documented
BS 970 EN45
Leaf springs, coil springs, automotive suspension
Can IS 4367 55Si7 Be Substituted With BS 970 EN45?
IS 4367 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 4367 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 4367 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 4367 55Si7
0 active listings and RFQs →
BS 970 EN45
9 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 4367 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 4367 55Si7 be substituted with BS 970 EN45?
IS 4367 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 4367 55Si7 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.