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NF A35-552 XC55 vs BS 970 (Part 1) 040A12

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

NF A35-552 XC55 (NF A35-552:1986) and BS 970 (Part 1) 040A12 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. NF A35-552 XC55 is typically used for used for springs, shafts, hand tools, wear plates, blades, and machine components., while BS 970 (Part 1) 040A12 is commonly used for as-rolled, or as-rolled and softened, steel (section two). NF A35-552 XC55 is defined under Association Francaise de Normalisation (NF), originating from France, while BS 970 (Part 1) 040A12 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, NF A35-552 XC55 vs BS 970 (Part 1) 040A12 is a 79.4% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With NF A35-552 XC55:
BS 970 (Part 3) 070M55 BS 970 (Part 1) 080A20 BS 970 (Part 1) 040A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A57 BS 970 (Part 1) 055M15 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 070M55
Match Breakdown
CHEMISTRY MATCH
79.4%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property NF A35-552 XC55 BS 970 (Part 1) 040A12
Standard NF A35-552:1986 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.52-0.60 0.10-0.15
Si (%) 0.10-0.35 Not specified
Mn (%) 0.50-0.80 0.30-0.50
P (%) 0.045 max Not specified
S (%) 0.045 max Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property NF A35-552 XC55 BS 970 (Part 1) 040A12
Tensile Strength 750-900 MPa Not specified
Yield Strength 450-600 MPa Not specified
Elongation 12-18% Not specified
Hardness 210-270 HB Not specified
Typical Applications
NF A35-552 XC55
Used for springs, shafts, hand tools, wear plates, blades, and machine components.
BS 970 (Part 1) 040A12
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can NF A35-552 XC55 Be Substituted With BS 970 (Part 1) 040A12?
NF A35-552 XC55 and BS 970 (Part 1) 040A12 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
NF A35-552 XC55
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 5500–7000 mm (216.54–275.59 in)
BS 970 (Part 1) 040A12
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On M-EX Right Now
NF A35-552 XC55
2 active listings and RFQs →
BS 970 (Part 1) 040A12
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Frequently Asked Questions
What is the difference between NF A35-552 XC55 and BS 970 (Part 1) 040A12?
NF A35-552 XC55 specifies Si, P, S which are not specified for BS 970 (Part 1) 040A12.
Can NF A35-552 XC55 be substituted with BS 970 (Part 1) 040A12?
NF A35-552 XC55 and BS 970 (Part 1) 040A12 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.