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BS 970 EN3B vs BS 970 (Part 1) 040A12

Close Alternative — 82.7% match based on chemical composition and mechanical property overlap.

BS 970 EN3B (BS 970:1955) and BS 970 (Part 1) 040A12 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. BS 970 EN3B is typically used for general engineering, cold forming, while BS 970 (Part 1) 040A12 is commonly used for as-rolled, or as-rolled and softened, steel (section two). BS 970 EN3B is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 040A12 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN3B vs BS 970 (Part 1) 040A12 is a 82.7% 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 82.7%.

Frequently Compared With BS 970 EN3B:
BS 970 (Part 1) 080A20 BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A04 BS 970 (Part 3) 045A10 BS 970 (Part 1) 070M20 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 045M10
Match Breakdown
CHEMISTRY MATCH
82.7%
MECHANICAL MATCH
No shared data
OVERALL
82.7%
Specifications
Property BS 970 EN3B BS 970 (Part 1) 040A12
Standard BS 970:1955 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) <=0.25 0.10-0.15
Si (%) <=0.35 Not specified
Mn (%) <=1.00 0.30-0.50
S (%) <=0.060 Not specified
P (%) <=0.060 Not specified
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 EN3B BS 970 (Part 1) 040A12
Tensile Strength ≥432 MPa (28 tons/sq in, converted) Not specified
Elongation ≥17% Not specified
Typical Applications
BS 970 EN3B
General engineering, cold forming
BS 970 (Part 1) 040A12
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can BS 970 EN3B Be Substituted With BS 970 (Part 1) 040A12?
BS 970 EN3B and BS 970 (Part 1) 040A12 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 EN3B
Round Bar → (3 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 4600–5000 mm (181.1–196.85 in)
BS 970 (Part 1) 040A12
No active listings currently.
On M-EX Right Now
BS 970 EN3B
3 active listings and RFQs →
BS 970 (Part 1) 040A12
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN3B and BS 970 (Part 1) 040A12?
BS 970 EN3B specifies Si, S, P which are not specified for BS 970 (Part 1) 040A12.
Can BS 970 EN3B be substituted with BS 970 (Part 1) 040A12?
BS 970 EN3B and BS 970 (Part 1) 040A12 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.