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BS 970 EN46 vs EN 10089 55Si7

Close Alternative — 84.9% match based on chemical composition and mechanical property overlap.

BS 970 EN46 (BS 970:1955) and EN 10089 55Si7 (EN 10089:2002) are both steel grades. Both fall under the Spring Steel category. BS 970 EN46 is typically used for bars for water hardening and tempering. laminated spring plates to this specification shall conform to the dimensional requirements in appendix c., while EN 10089 55Si7 is commonly used for leaf springs, coil springs, torsion bars. BS 970 EN46 is defined under British Standards (BS), originating from United Kingdom, while EN 10089 55Si7 is defined under European Standard (EN), originating from Europe.

As per chemical composition, BS 970 EN46 vs EN 10089 55Si7 is a 91.7% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 84.9%.

Frequently Compared With BS 970 EN46:
IS 3431 55Si7 IS 4367 55Si7 IS 3195 113C6 IS 3431 50Cr4V2 IS 3195 50Cr4V2 EN 10083-1 51CrV4 EN 10083-3 51CrV4 IS 3195 52Cr4Mo2V IS 5517 55Cr3 IS 1570 (Part 4) 55Si7 IS 3195 55Si7 BS 970 EN42
Match Breakdown
CHEMISTRY MATCH
91.7%
MECHANICAL MATCH
No shared data
OVERALL
84.9%
Specifications
Property BS 970 EN46 EN 10089 55Si7
Standard BS 970:1955 EN 10089:2002
Category Spring Steel Spring Steel
C (%) 0.35-0.45 0.51–0.59
Si (%) 1.50-2.00 1.50–2.00
Mn (%) 0.70-1.00 0.70–1.00
S (%) <=0.050 ≤0.040
P (%) <=0.050 ≤0.040
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 EN46 EN 10089 55Si7
Tensile Strength Not specified 1000–1200 MPa
Yield Strength Not specified ≥900 MPa
Elongation Not specified ≥7%
Hardness Not specified 285–363 HB
Typical Applications
BS 970 EN46
Bars for water hardening and tempering. Laminated spring plates to this specification shall conform to the dimensional requirements in Appendix C.
EN 10089 55Si7
Leaf springs, coil springs, torsion bars
Can BS 970 EN46 Be Substituted With EN 10089 55Si7?
BS 970 EN46 and EN 10089 55Si7 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
Forms & Sizes Available on M-EX
BS 970 EN46
No active listings currently.
EN 10089 55Si7
Round Bar → (3 listings)
Diameter: 30–30 mm (1.18–1.18 in)
Length: 4200–7000 mm (165.35–275.59 in)
On M-EX Right Now
BS 970 EN46
0 active listings and RFQs →
EN 10089 55Si7
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN46 and EN 10089 55Si7?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN46 be substituted with EN 10089 55Si7?
BS 970 EN46 and EN 10089 55Si7 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.