Close Alternative — 77.2% match
based on chemical composition and mechanical property overlap.
BS 970 EN1A (BS 970:1955) and SAE J403 1126 (SAE J403:2014) are both steel grades.
Both fall under the Free Machining Steel category.
BS 970 EN1A is typically used for automatic screw machine parts, bolts, studs, shafts, while SAE J403 1126 is commonly used for chemistry-only grade; product scope as listed in the composition notes.
BS 970 EN1A is defined under British Standards (BS), originating from United Kingdom, while SAE J403 1126 is defined under SAE International, originating from United States.
As per chemical composition, BS 970 EN1A vs SAE J403 1126 is a 77.2% 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 77.2%.
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 EN1A
SAE J403 1126
Tensile Strength
≥355 MPa (23 tons/sq in, converted)
Not specified
Elongation
≥26%
Not specified
Condition
As rolled, normalised or bright finished (other than cold rolled or cold drawn), ruling section 4 in (lowest-strength condition of the standard)
Chemistry-only grade; product scope as listed in the composition notes
Key Differences
BS 970 EN1A specifies Si which is not specified for SAE J403 1126.
Can BS 970 EN1A Be Substituted With SAE J403 1126?
BS 970 EN1A and SAE J403 1126 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.
What is the difference between BS 970 EN1A and SAE J403 1126?
BS 970 EN1A specifies Si which is not specified for SAE J403 1126.
Can BS 970 EN1A be substituted with SAE J403 1126?
BS 970 EN1A and SAE J403 1126 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.