Post Stock Login Register

NF A35-552 XC40 vs BS 970 (Part 1) 055M15

Minimal Match — 54.4% match based on chemical composition and mechanical property overlap.

NF A35-552 XC40 (NF A35-552:1986) and BS 970 (Part 1) 055M15 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. NF A35-552 XC40 is typically used for used for gears, shafts, crankshafts, couplings, machinery parts, and forged components., while BS 970 (Part 1) 055M15 is commonly used for as-rolled, or as-rolled and softened, steel (section two). NF A35-552 XC40 is defined under Association Francaise de Normalisation (NF), originating from France, while BS 970 (Part 1) 055M15 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, NF A35-552 XC40 vs BS 970 (Part 1) 055M15 is a 81.6% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 54.4%.

Frequently Compared With NF A35-552 XC40:
BS 970 (Part 1) 040A10 BS 970 (Part 1) 080A20 BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A12 BS 970 (Part 1) 060A40 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10
Match Breakdown
CHEMISTRY MATCH
81.6%
MECHANICAL MATCH
0%
OVERALL
54.4%
Specifications
Property NF A35-552 XC40 BS 970 (Part 1) 055M15
Standard NF A35-552:1986 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.37-0.44 <=0.20
Si (%) 0.10-0.35 Not specified
Mn (%) 0.50-0.80 <=0.80
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 XC40 BS 970 (Part 1) 055M15
Tensile Strength 620-780 MPa 310 MPa min
Yield Strength 350-480 MPa Not specified
Elongation 16-22% 25 % min
Hardness 180-230 HB 121 HB min
Condition Not specified As-rolled
Typical Applications
NF A35-552 XC40
Used for gears, shafts, crankshafts, couplings, machinery parts, and forged components.
BS 970 (Part 1) 055M15
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can NF A35-552 XC40 Be Substituted With BS 970 (Part 1) 055M15?
NF A35-552 XC40 and BS 970 (Part 1) 055M15 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 XC40
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 5000–5700 mm (196.85–224.41 in)
BS 970 (Part 1) 055M15
No active listings currently.
On M-EX Right Now
NF A35-552 XC40
2 active listings and RFQs →
BS 970 (Part 1) 055M15
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between NF A35-552 XC40 and BS 970 (Part 1) 055M15?
NF A35-552 XC40 specifies Si, P, S which are not specified for BS 970 (Part 1) 055M15.
Can NF A35-552 XC40 be substituted with BS 970 (Part 1) 055M15?
NF A35-552 XC40 and BS 970 (Part 1) 055M15 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.