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BS 970 (Part 3) 070M55 vs NF A35-552 XC55

Strong Match — 95.3% match based on chemical composition and mechanical property overlap.

BS 970 (Part 3) 070M55 (BS 970 (Part 3):1991) and NF A35-552 XC55 (NF A35-552:1986) are both steel grades. Both fall under the Carbon Steel category. BS 970 (Part 3) 070M55 is typically used for used for springs, blades, wear plates, hand tools, shafts, and cutting components., while NF A35-552 XC55 is commonly used for used for springs, shafts, hand tools, wear plates, blades, and machine components.. BS 970 (Part 3) 070M55 is defined under British Standards (BS), originating from United Kingdom, while NF A35-552 XC55 is defined under Association Francaise de Normalisation (NF), originating from France.

As per chemical composition, BS 970 (Part 3) 070M55 vs NF A35-552 XC55 is a 95.3% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 95.3%.

Frequently Compared With BS 970 (Part 3) 070M55:
BS 970 (Part 1) 040A10 BS 970 (Part 1) 080A20 BS 970 (Part 1) 040A12 BS 970 (Part 3) 045A10 BS 970 (Part 1) 070M55 BS 970 (Part 1) 045A10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 055M15 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10
Match Breakdown
CHEMISTRY MATCH
95.3%
MECHANICAL MATCH
No shared data
OVERALL
95.3%
Specifications
Property BS 970 (Part 3) 070M55 NF A35-552 XC55
Standard BS 970 (Part 3):1991 NF A35-552:1986
Category Carbon Steel Carbon Steel
C (%) 0.50-0.60 0.52-0.60
Si (%) 0.10-0.40 0.10-0.35
Mn (%) 0.50-0.90 0.50-0.80
P (%) <=0.05 0.045 max
S (%) <=0.05 0.045 max
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property BS 970 (Part 3) 070M55 NF A35-552 XC55
Tensile Strength Not specified 750-900 MPa
Yield Strength Not specified 450-600 MPa
Elongation Not specified 12-18%
Hardness Not specified 210-270 HB
Typical Applications
BS 970 (Part 3) 070M55
Used for springs, blades, wear plates, hand tools, shafts, and cutting components.
NF A35-552 XC55
Used for springs, shafts, hand tools, wear plates, blades, and machine components.
Can BS 970 (Part 3) 070M55 Be Substituted With NF A35-552 XC55?
BS 970 (Part 3) 070M55 and NF A35-552 XC55 overlap closely enough on chemistry and mechanical properties that NF A35-552 XC55 is often considered as a substitute for BS 970 (Part 3) 070M55 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
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)
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)
On M-EX Right Now
BS 970 (Part 3) 070M55
2 active listings and RFQs →
NF A35-552 XC55
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 3) 070M55 and NF A35-552 XC55?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 (Part 3) 070M55 be substituted with NF A35-552 XC55?
BS 970 (Part 3) 070M55 and NF A35-552 XC55 overlap closely enough on chemistry and mechanical properties that NF A35-552 XC55 is often considered as a substitute for BS 970 (Part 3) 070M55 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.