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BS 970 EN50 vs EN 10083-3 51CrV4

Close Alternative — 71.5% match based on chemical composition and mechanical property overlap.

BS 970 EN50 (BS 970:1955) and EN 10083-3 51CrV4 (EN 10083-3:2006) 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 10083-3 51CrV4 is commonly used for valve springs, clutch springs, high duty coil springs. BS 970 EN50 is defined under British Standards (BS), originating from United Kingdom, while EN 10083-3 51CrV4 is defined under European Standard (EN), originating from Europe.

As per chemical composition, BS 970 EN50 vs EN 10083-3 51CrV4 is a 71.5% 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 71.5%.

Frequently Compared With BS 970 EN50:
IS 5517 55Cr3 EN 10089 55Cr3 EN 10089 50CrV4 IS 3431 50Cr4V2 IS 3195 50Cr4V2 EN 10083-1 51CrV4 IS 3195 113C6 EN 10083-1 51CrV4 IS 3195 52Cr4Mo2V IS 3431 60Cr4V2 IS 3195 60Cr4V2
Other Spring Steel Grades to Compare With BS 970 EN50:
GB/T 1222 55CrMnA
Match Breakdown
CHEMISTRY MATCH
71.5%
MECHANICAL MATCH
No shared data
OVERALL
71.5%
Specifications
Property BS 970 EN50 EN 10083-3 51CrV4
Standard BS 970:1955 EN 10083-3:2006
Category Spring Steel Spring Steel
C (%) 0.40-0.50 0.47-0.55
Si (%) 0.10-0.35 <=0.40
Mn (%) 0.50-0.70 0.70-1.10
Cr (%) 1.00-1.50 0.90-1.20
V (%) >=0.15 0.10-0.25
S (%) <=0.040 <=0.025
P (%) <=0.040 <=0.025
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 10083-3 51CrV4
Condition Not specified Quenched and tempered (+QT), ruling section d <= 16 mm
Elongation Not specified 9% min
Hardness Not specified Soft annealed (+A): 248 HBW 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 10083-3 51CrV4
Valve springs, clutch springs, high duty coil springs
Can BS 970 EN50 Be Substituted With EN 10083-3 51CrV4?
BS 970 EN50 and EN 10083-3 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.
Forms & Sizes Available on M-EX
BS 970 EN50
No active listings currently.
EN 10083-3 51CrV4
Round Bar → (3 listings)
Diameter: 30–30 mm (1.18–1.18 in)
Length: 6300–7000 mm (248.03–275.59 in)
On M-EX Right Now
BS 970 EN50
0 active listings and RFQs →
EN 10083-3 51CrV4
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN50 and EN 10083-3 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 10083-3 51CrV4?
BS 970 EN50 and EN 10083-3 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.