Strong Match — 94.3% match
based on chemical composition and mechanical property overlap.
BS 970 EN12A (BS 970:1955) and BS 970 EN12B (BS 970:1955) are both steel grades.
Both fall under the Alloy Steel category.
BS 970 EN12A is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN12B is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, BS 970 EN12A vs BS 970 EN12B is a 91.4% match.
As per mechanical properties, the match is 100%.
Combined, this makes them a strong match overall at 94.3%.
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 EN12A
BS 970 EN12B
Tensile Strength
≥541 MPa (35 tons/sq in, converted)
≥541 MPa (35 tons/sq in, converted)
Yield Strength
≥309 MPa (20 tons/sq in, converted)
≥309 MPa (20 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)
Normalised, ruling section 6 in (lowest-strength condition of the standard)
Can BS 970 EN12A Be Substituted With BS 970 EN12B?
BS 970 EN12A and BS 970 EN12B overlap closely enough on chemistry and mechanical properties that BS 970 EN12B is often considered as a substitute for BS 970 EN12A 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 EN12A and BS 970 EN12B?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN12A be substituted with BS 970 EN12B?
BS 970 EN12A and BS 970 EN12B overlap closely enough on chemistry and mechanical properties that BS 970 EN12B is often considered as a substitute for BS 970 EN12A in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.