Close Alternative — 72.9% match
based on chemical composition and mechanical property overlap.
BS 970 EN50 (BS 970:1955) and EN 10083-1 51CrV4 (EN 10083-1:1991) are both steel grades.
Both fall under the Spring Steel category.
BS 970 EN50 is typically used for annealed wire for oil-hardened and tempered springs; covered by bs 1429., while EN 10083-1 51CrV4 is commonly used for quenched and tempered machine parts; non alloy steels also normalized (clause 1).
BS 970 EN50 is defined under British Standards (BS), originating from United Kingdom, while EN 10083-1 51CrV4 is defined under European Standard (EN), originating from Europe.
As per chemical composition, BS 970 EN50 vs EN 10083-1 51CrV4 is a 72.9% 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 72.9%.
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 EN50
EN 10083-1 51CrV4
Condition
Not specified
Quenched and tempered, ruling section d <= 16 mm
Elongation
Not specified
9% min
Hardness
Not specified
Soft annealed: 248 HB max
Tensile Strength
Not specified
1100 to 1300 MPa
Yield Strength
Not specified
900 MPa min
Typical Applications
BS 970 EN50
Annealed wire for oil-hardened and tempered springs; covered by BS 1429.
EN 10083-1 51CrV4
Quenched and tempered machine parts; non alloy steels also normalized (clause 1)
Can BS 970 EN50 Be Substituted With EN 10083-1 51CrV4?
BS 970 EN50 and EN 10083-1 51CrV4 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 EN50 and EN 10083-1 51CrV4?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN50 be substituted with EN 10083-1 51CrV4?
BS 970 EN50 and EN 10083-1 51CrV4 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.