Post Stock Login Register

NF A35-552 XC40 vs BS 970 (Part 3) 070M55

Close Alternative — 84.9% match based on chemical composition and mechanical property overlap.

NF A35-552 XC40 (NF A35-552:1986) and BS 970 (Part 3) 070M55 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Carbon Steel category. NF A35-552 XC40 is typically used for used for gears, shafts, crankshafts, couplings, machinery parts, and forged components., while BS 970 (Part 3) 070M55 is commonly used for used for springs, blades, wear plates, hand tools, shafts, and cutting components.. NF A35-552 XC40 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 A35-552 XC40 vs BS 970 (Part 3) 070M55 is a 88.5% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 84.9%.

Frequently Compared With NF A35-552 XC40:
BS 970 (Part 1) 040A10 BS 970 (Part 1) 080A20 BS 970 (Part 1) 040A12 BS 970 (Part 1) 055M15 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
88.5%
MECHANICAL MATCH
No shared data
OVERALL
84.9%
Specifications
Property NF A35-552 XC40 BS 970 (Part 3) 070M55
Standard NF A35-552:1986 BS 970 (Part 3):1991
Category Carbon Steel Carbon Steel
C (%) 0.37-0.44 0.50-0.60
Si (%) 0.10-0.35 0.10-0.40
Mn (%) 0.50-0.80 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 A35-552 XC40 BS 970 (Part 3) 070M55
Tensile Strength 620-780 MPa Not specified
Yield Strength 350-480 MPa Not specified
Elongation 16-22% Not specified
Hardness 180-230 HB Not specified
Typical Applications
NF A35-552 XC40
Used for gears, shafts, crankshafts, couplings, machinery parts, and forged components.
BS 970 (Part 3) 070M55
Used for springs, blades, wear plates, hand tools, shafts, and cutting components.
Can NF A35-552 XC40 Be Substituted With BS 970 (Part 3) 070M55?
NF A35-552 XC40 and BS 970 (Part 3) 070M55 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
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 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 A35-552 XC40
2 active listings and RFQs →
BS 970 (Part 3) 070M55
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between NF A35-552 XC40 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 A35-552 XC40 be substituted with BS 970 (Part 3) 070M55?
NF A35-552 XC40 and BS 970 (Part 3) 070M55 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.