Strong Match — 89.4% match
based on chemical composition and mechanical property overlap.
BS 970 EN8BM (BS 970:1955) and BS 970 EN8A (BS 970:1955) are both steel grades.
Both fall under the Carbon Steel category.
BS 970 EN8BM is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN8A is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, BS 970 EN8BM vs BS 970 EN8A is a 84.1% match.
As per mechanical properties, the match is 100%.
Combined, this makes them a strong match overall at 89.4%.
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 EN8BM
BS 970 EN8A
Tensile Strength
≥541 MPa (35 tons/sq in, converted)
≥541 MPa (35 tons/sq in, converted)
Yield Strength
≥278 MPa (18 tons/sq in, converted)
≥278 MPa (18 tons/sq in, converted)
Elongation
≥20%
≥20%
Hardness
152-207 HB
152-207 HB
Condition
Normalised, ruling section 6 in (lowest-strength condition of the standard)
NGC 1, Normalised, ruling section 6 in (lowest-strength condition of the standard)
Typical Applications
BS 970 EN8BM
Not documented
BS 970 EN8A
Shafts, axles, gears, studs
Can BS 970 EN8BM Be Substituted With BS 970 EN8A?
BS 970 EN8BM and BS 970 EN8A overlap closely enough on chemistry and mechanical properties that BS 970 EN8A is often considered as a substitute for BS 970 EN8BM in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
What is the difference between BS 970 EN8BM and BS 970 EN8A?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN8BM be substituted with BS 970 EN8A?
BS 970 EN8BM and BS 970 EN8A overlap closely enough on chemistry and mechanical properties that BS 970 EN8A is often considered as a substitute for BS 970 EN8BM in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.