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BS 970 EN3D vs BS 970 EN5A

Strong Match — 88.6% match based on chemical composition and mechanical property overlap.

BS 970 EN3D (BS 970:1955) and BS 970 EN5A (BS 970:1955) are both steel grades. Both fall under the Carbon Steel category. BS 970 EN3D is typically used for bright bars for machining, while BS 970 EN5A is commonly used for axles, crankshafts, connecting rods. BS 970 EN3D is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN5A is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN3D vs BS 970 EN5A is a 88.6% 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 88.6%.

Frequently Compared With BS 970 EN3D:
BS 970 (Part 3) 070M20 BS 970 (Part 1) 040A12 BS 970 (Part 1) 040A10 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) 070M20 BS 970 (Part 1) 040A04 BS 970 (Part 1) 055M15
Match Breakdown
CHEMISTRY MATCH
88.6%
MECHANICAL MATCH
No shared data
OVERALL
88.6%
Specifications
Property BS 970 EN3D BS 970 EN5A
Standard BS 970:1955 BS 970:1955
Category Carbon Steel Carbon Steel
C (%) 0.15-0.25 0.25-0.30
Si (%) 0.05-0.35 0.05-0.35
Mn (%) 0.60-1.00 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 EN3D BS 970 EN5A
Tensile Strength ≥432 MPa (28 tons/sq in, converted) Not specified
Elongation ≥15% Not specified
Condition size (diameter or width across flats) Over 2 1/2 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN3D
Bright bars for machining
BS 970 EN5A
Axles, crankshafts, connecting rods
Can BS 970 EN3D Be Substituted With BS 970 EN5A?
BS 970 EN3D and BS 970 EN5A overlap closely enough on chemistry and mechanical properties that BS 970 EN5A is often considered as a substitute for BS 970 EN3D 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 EN3D
No active listings currently.
BS 970 EN5A
Round Bar → (3 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 6200–6800 mm (244.09–267.72 in)
On M-EX Right Now
BS 970 EN3D
0 active listings and RFQs →
BS 970 EN5A
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN3D and BS 970 EN5A?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN3D be substituted with BS 970 EN5A?
BS 970 EN3D and BS 970 EN5A overlap closely enough on chemistry and mechanical properties that BS 970 EN5A is often considered as a substitute for BS 970 EN3D in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.