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BS 970 EN45 vs EN 10083-3 51CrV4

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

BS 970 EN45 (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 EN45 is typically used for leaf springs, coil springs, automotive suspension, while EN 10083-3 51CrV4 is commonly used for valve springs, clutch springs, high duty coil springs. BS 970 EN45 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 EN45 vs EN 10083-3 51CrV4 is a 68.5% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With BS 970 EN45:
EN 10089 55Si7 EN 10089 50CrV4 IS 3431 55Si7 EN 10089 55Cr3 GB/T 1222 55CrMnA IS 1570 (Part 4) 55Si7 IS 1570 (Part 4) 60Si7 IS 1570 (Part 4) 65Si7 IS 4367 55Si7 IS 3195 113C6 IS 3431 60Si7 IS 3195 55Si7
Match Breakdown
CHEMISTRY MATCH
68.5%
MECHANICAL MATCH
No shared data
OVERALL
35%
Specifications
Property BS 970 EN45 EN 10083-3 51CrV4
Standard BS 970:1955 EN 10083-3:2006
Category Spring Steel Spring Steel
C (%) 0.50-0.60 0.47-0.55
Si (%) 1.50-2.00 <=0.40
Mn (%) 0.70-1.00 0.70-1.10
S (%) <=0.050 <=0.025
P (%) <=0.050 <=0.025
Cr (%) Not specified 0.90-1.20
V (%) Not specified 0.10-0.25
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 EN45 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 EN45
Leaf springs, coil springs, automotive suspension
EN 10083-3 51CrV4
Valve springs, clutch springs, high duty coil springs
Key Differences
Can BS 970 EN45 Be Substituted With EN 10083-3 51CrV4?
BS 970 EN45 and EN 10083-3 51CrV4 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
Forms & Sizes Available on M-EX
BS 970 EN45
Round Bar → (6 listings)
Diameter: 55–60 mm (2.17–2.36 in)
Length: 5200–6200 mm (204.72–244.09 in)
Flat Bar → (3 listings)
Thickness: 25–25 mm (0.98–0.98 in)
Width: 150–150 mm (5.91–5.91 in)
Length: 2500–3600 mm (98.43–141.73 in)
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 EN45
9 active listings and RFQs →
EN 10083-3 51CrV4
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN45 and EN 10083-3 51CrV4?
EN 10083-3 51CrV4 specifies Cr, V which are not specified for BS 970 EN45.
Can BS 970 EN45 be substituted with EN 10083-3 51CrV4?
BS 970 EN45 and EN 10083-3 51CrV4 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.