Post Stock Login Register

NF A35-551 XC18 vs BS 970 (Part 1) 045A10

Minimal Match — 54.9% match based on chemical composition and mechanical property overlap.

NF A35-551 XC18 (NF A35-551:1986) and BS 970 (Part 1) 045A10 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. NF A35-551 XC18 is typically used for used for shafts, pins, forged parts, welded structures, machine components, and low-stress fittings., while BS 970 (Part 1) 045A10 is commonly used for case hardening steel (section four). NF A35-551 XC18 is defined under Association Francaise de Normalisation (NF), originating from France, while BS 970 (Part 1) 045A10 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, NF A35-551 XC18 vs BS 970 (Part 1) 045A10 is a 82.3% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 54.9%.

Frequently Compared With NF A35-551 XC18:
BS 970 (Part 1) 040A10 BS 970 (Part 1) 080A20 BS 970 (Part 3) 070M55 BS 970 (Part 3) 070M20 BS 970 (Part 3) 080A15 BS 970 (Part 3) 045A10 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045M10
Match Breakdown
CHEMISTRY MATCH
82.3%
MECHANICAL MATCH
0%
OVERALL
54.9%
Specifications
Property NF A35-551 XC18 BS 970 (Part 1) 045A10
Standard NF A35-551:1986 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.15-0.21 0.08-0.13
Si (%) 0.10-0.35 Not specified
Mn (%) 0.40-0.70 0.30-0.60
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 A35-551 XC18 BS 970 (Part 1) 045A10
Tensile Strength 370-500 MPa 430 MPa min
Yield Strength 220-300 MPa Not specified
Elongation 26-32% 18 % min
Hardness 110-150 HB Not specified
Condition Not specified Case hardened, 19 mm test bar
Typical Applications
NF A35-551 XC18
Used for shafts, pins, forged parts, welded structures, machine components, and low-stress fittings.
BS 970 (Part 1) 045A10
Case hardening steel (section four)
Key Differences
Can NF A35-551 XC18 Be Substituted With BS 970 (Part 1) 045A10?
NF A35-551 XC18 and BS 970 (Part 1) 045A10 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 A35-551 XC18
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 6100–6800 mm (240.16–267.72 in)
BS 970 (Part 1) 045A10
No active listings currently.
On M-EX Right Now
NF A35-551 XC18
2 active listings and RFQs →
BS 970 (Part 1) 045A10
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between NF A35-551 XC18 and BS 970 (Part 1) 045A10?
NF A35-551 XC18 specifies Si, P, S which are not specified for BS 970 (Part 1) 045A10.
Can NF A35-551 XC18 be substituted with BS 970 (Part 1) 045A10?
NF A35-551 XC18 and BS 970 (Part 1) 045A10 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.