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BS 970 EN3A vs BS 970 EN5B

Strong Match — 88% match based on chemical composition and mechanical property overlap.

BS 970 EN3A (BS 970:1955) and BS 970 EN5B (BS 970:1955) are both steel grades. Both fall under the Carbon Steel category. BS 970 EN3A is typically used for bolts, screws, light structural components, while BS 970 EN5B is commonly used for mechanical properties are not part of the contractual obligations of specifications en 5a, en 5b and en 5c.. BS 970 EN3A is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN5B is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN3A vs BS 970 EN5B is a 88% 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 88%.

Frequently Compared With BS 970 EN3A:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 3) 070M20 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15
Match Breakdown
CHEMISTRY MATCH
88%
MECHANICAL MATCH
No shared data
OVERALL
88%
Specifications
Property BS 970 EN3A BS 970 EN5B
Standard BS 970:1955 BS 970:1955
Category Carbon Steel Carbon Steel
C (%) 0.15-0.25 0.28-0.33
Si (%) 0.05-0.35 0.05-0.35
Mn (%) 0.40-0.90 0.70-0.90
S (%) <=0.060 <=0.060
P (%) <=0.060 <=0.060
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 EN3A BS 970 EN5B
Tensile Strength ≥432 MPa (28 tons/sq in, converted) Not specified
Elongation ≥25% Not specified
Condition , ruling section 6 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN3A
Bolts, screws, light structural components
BS 970 EN5B
Mechanical properties are not part of the contractual obligations of specifications En 5A, En 5B and En 5C.
Can BS 970 EN3A Be Substituted With BS 970 EN5B?
BS 970 EN3A and BS 970 EN5B overlap closely enough on chemistry and mechanical properties that BS 970 EN5B is often considered as a substitute for BS 970 EN3A 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
BS 970 EN3A
Round Bar → (5 listings)
Diameter: 40–45 mm (1.57–1.77 in)
Length: 5100–7000 mm (200.79–275.59 in)
BS 970 EN5B
No active listings currently.
On M-EX Right Now
BS 970 EN3A
5 active listings and RFQs →
BS 970 EN5B
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN3A and BS 970 EN5B?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN3A be substituted with BS 970 EN5B?
BS 970 EN3A and BS 970 EN5B overlap closely enough on chemistry and mechanical properties that BS 970 EN5B is often considered as a substitute for BS 970 EN3A in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.