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BS 970 EN45 vs GB/T 1222 55CrMnA

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

BS 970 EN45 (BS 970:1955) and GB/T 1222 55CrMnA (GB/T 1222-2016) 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 GB/T 1222 55CrMnA is commonly used for automotive leaf springs, coil springs. BS 970 EN45 is defined under British Standards (BS), originating from United Kingdom, while GB/T 1222 55CrMnA is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, BS 970 EN45 vs GB/T 1222 55CrMnA is a 81.7% 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 10083-3 51CrV4 EN 10089 55Cr3 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
81.7%
MECHANICAL MATCH
No shared data
OVERALL
35%
Specifications
Property BS 970 EN45 GB/T 1222 55CrMnA
Standard BS 970:1955 GB/T 1222-2016
Category Spring Steel Spring Steel
C (%) 0.50-0.60 0.52–0.60
Si (%) 1.50-2.00 0.17–0.37
Mn (%) 0.70-1.00 0.70–1.00
S (%) <=0.050 Not specified
P (%) <=0.050 Not specified
Cr (%) Not specified 0.65–0.95
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 GB/T 1222 55CrMnA
Tensile Strength Not specified ≥1225 MPa
Yield Strength Not specified ≥1080 MPa
Elongation Not specified ≥6%
Typical Applications
BS 970 EN45
Leaf springs, coil springs, automotive suspension
GB/T 1222 55CrMnA
Automotive leaf springs, coil springs
Key Differences
Can BS 970 EN45 Be Substituted With GB/T 1222 55CrMnA?
BS 970 EN45 and GB/T 1222 55CrMnA 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)
GB/T 1222 55CrMnA
Round Bar → (2 listings)
Diameter: 30–30 mm (1.18–1.18 in)
Length: 5600–7000 mm (220.47–275.59 in)
On M-EX Right Now
BS 970 EN45
9 active listings and RFQs →
GB/T 1222 55CrMnA
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN45 and GB/T 1222 55CrMnA?
BS 970 EN45 specifies S, P which are not specified for GB/T 1222 55CrMnA. GB/T 1222 55CrMnA specifies Cr which is not specified for BS 970 EN45.
Can BS 970 EN45 be substituted with GB/T 1222 55CrMnA?
BS 970 EN45 and GB/T 1222 55CrMnA 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.