Close Alternative — 77.9% match
based on chemical composition and mechanical property overlap.
BS 970 EN11 (BS 970:1955) and SAE J404 5140 (SAE J404:2009) are both steel grades.
Both fall under the Alloy Steel category.
BS 970 EN11 is typically used for bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. suitable for tensile ranges 55/65 (t) and 65/75 (v) tons/sq in; purchaser to state t or v on the order., while SAE J404 5140 is commonly used for used for gears, shafts, spindles, automotive parts, bolts, and machine components..
BS 970 EN11 is defined under British Standards (BS), originating from United Kingdom, while SAE J404 5140 is defined under SAE International, originating from United States.
As per chemical composition, BS 970 EN11 vs SAE J404 5140 is a 77.9% 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 77.9%.
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 EN11
SAE J404 5140
Tensile Strength
≥849 MPa (55 tons/sq in, converted)
Not specified
Yield Strength
≥618 MPa (40 tons/sq in, converted)
Not specified
Elongation
≥15%
Not specified
Hardness
248-302 HB
Not specified
Condition
Hardened and tempered T, ruling section 2 1/2 in (lowest-strength condition of the standard)
Not specified
Typical Applications
BS 970 EN11
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. Suitable for tensile ranges 55/65 (T) and 65/75 (V) tons/sq in; purchaser to state T or V on the order.
SAE J404 5140
Used for gears, shafts, spindles, automotive parts, bolts, and machine components.
Can BS 970 EN11 Be Substituted With SAE J404 5140?
BS 970 EN11 and SAE J404 5140 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 EN11 and SAE J404 5140?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN11 be substituted with SAE J404 5140?
BS 970 EN11 and SAE J404 5140 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.