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NF A35-551 XC18 vs BS 970 (Part 3) 070M55

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

NF A35-551 XC18 (NF A35-551:1986) and BS 970 (Part 3) 070M55 (BS 970 (Part 3):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 3) 070M55 is commonly used for used for springs, blades, wear plates, hand tools, shafts, and cutting components.. NF A35-551 XC18 is defined under Association Francaise de Normalisation (NF), originating from France, while BS 970 (Part 3) 070M55 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, NF A35-551 XC18 vs BS 970 (Part 3) 070M55 is a 86.5% 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 A35-551 XC18:
BS 970 (Part 1) 040A10 BS 970 (Part 1) 080A20 BS 970 (Part 3) 070M20 BS 970 (Part 3) 080A15 BS 970 (Part 1) 040A12 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10
Match Breakdown
CHEMISTRY MATCH
86.5%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property NF A35-551 XC18 BS 970 (Part 3) 070M55
Standard NF A35-551:1986 BS 970 (Part 3):1991
Category Carbon Steel Carbon Steel
C (%) 0.15-0.21 0.50-0.60
Si (%) 0.10-0.35 0.10-0.40
Mn (%) 0.40-0.70 0.50-0.90
P (%) 0.045 max <=0.05
S (%) 0.045 max <=0.05
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 3) 070M55
Tensile Strength 370-500 MPa Not specified
Yield Strength 220-300 MPa Not specified
Elongation 26-32% Not specified
Hardness 110-150 HB Not specified
Typical Applications
NF A35-551 XC18
Used for shafts, pins, forged parts, welded structures, machine components, and low-stress fittings.
BS 970 (Part 3) 070M55
Used for springs, blades, wear plates, hand tools, shafts, and cutting components.
Can NF A35-551 XC18 Be Substituted With BS 970 (Part 3) 070M55?
NF A35-551 XC18 and BS 970 (Part 3) 070M55 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 3) 070M55
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 4800–5800 mm (188.98–228.35 in)
On M-EX Right Now
NF A35-551 XC18
2 active listings and RFQs →
BS 970 (Part 3) 070M55
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between NF A35-551 XC18 and BS 970 (Part 3) 070M55?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can NF A35-551 XC18 be substituted with BS 970 (Part 3) 070M55?
NF A35-551 XC18 and BS 970 (Part 3) 070M55 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.