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BS 970 EN42B vs GB/T 1222 55CrMnA

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

BS 970 EN42B (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 EN42B 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 EN42B vs GB/T 1222 55CrMnA is a 74.7% 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 EN42B:
BS 970 EN42C BS 970 EN42F BS 970 EN42 EN 10083-1 51CrV4 BS 970 EN42E IS 3195 113C6 EN 10089 50CrV4 EN 10083-3 51CrV4 IS 5517 55Cr3 IS 4367 55Si7 IS 3195 60Si7 IS 3431 50Cr4V2
Match Breakdown
CHEMISTRY MATCH
74.7%
MECHANICAL MATCH
No shared data
OVERALL
35%
Specifications
Property BS 970 EN42B GB/T 1222 55CrMnA
Standard BS 970:1955 GB/T 1222-2016
Category Spring Steel Spring Steel
C (%) 0.60-0.70 0.52–0.60
Si (%) <=0.35 0.17–0.37
Mn (%) 0.55-0.80 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 EN42B GB/T 1222 55CrMnA
Tensile Strength Not specified ≥1225 MPa
Yield Strength Not specified ≥1080 MPa
Elongation Not specified ≥6%
Typical Applications
BS 970 EN42B
Not documented
GB/T 1222 55CrMnA
Automotive leaf springs, coil springs
Key Differences
Can BS 970 EN42B Be Substituted With GB/T 1222 55CrMnA?
BS 970 EN42B 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 EN42B
No active listings currently.
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 EN42B
0 active listings and RFQs →
GB/T 1222 55CrMnA
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN42B and GB/T 1222 55CrMnA?
BS 970 EN42B 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 EN42B.
Can BS 970 EN42B be substituted with GB/T 1222 55CrMnA?
BS 970 EN42B 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.