Strong Match — 98.7% match
based on chemical composition and mechanical property overlap.
BS 970 EN15 (BS 970:1955) and BS 970 EN15A (BS 970:1955) are both steel grades.
Both fall under the Carbon Steel category.
BS 970 EN15 is typically used for heavy duty shafts, couplings, general engineering, while BS 970 EN15A is commonly used for bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. suitable for 40/50 (q), 45/55 (r), 50/60 (s) tons/sq in according to ruling section..
BS 970 EN15 is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN15A is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, BS 970 EN15 vs BS 970 EN15A is a 98.1% match.
As per mechanical properties, the match is 100%.
Combined, this makes them a strong match overall at 98.7%.
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 EN15
BS 970 EN15A
Tensile Strength
≥618 MPa (40 tons/sq in, converted)
≥618 MPa (40 tons/sq in, converted)
Yield Strength
≥432 MPa (28 tons/sq in, converted)
≥432 MPa (28 tons/sq in, converted)
Elongation
≥22%
≥22%
Hardness
179-229 HB
179-229 HB
Condition
Hardened and tempered Q, ruling section 6 in (lowest-strength condition of the standard)
Hardened and tempered Q, ruling section 4 in (lowest-strength condition of the standard)
Typical Applications
BS 970 EN15
Heavy duty shafts, couplings, general engineering
BS 970 EN15A
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. Suitable for 40/50 (Q), 45/55 (R), 50/60 (S) tons/sq in according to ruling section.
Can BS 970 EN15 Be Substituted With BS 970 EN15A?
BS 970 EN15 and BS 970 EN15A overlap closely enough on chemistry and mechanical properties that BS 970 EN15A is often considered as a substitute for BS 970 EN15 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 EN15 and BS 970 EN15A?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN15 be substituted with BS 970 EN15A?
BS 970 EN15 and BS 970 EN15A overlap closely enough on chemistry and mechanical properties that BS 970 EN15A is often considered as a substitute for BS 970 EN15 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.