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BS 970 (Part 3) 070M20 vs NF A35-551 XC18

Strong Match — 91.2% match based on chemical composition and mechanical property overlap.

BS 970 (Part 3) 070M20 (BS 970 (Part 3):1991) and NF A35-551 XC18 (NF A35-551:1986) are both steel grades. Both fall under the Carbon Steel category. BS 970 (Part 3) 070M20 is typically used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; carbon and carbon manganese steel (table 13), while NF A35-551 XC18 is commonly used for used for shafts, pins, forged parts, welded structures, machine components, and low-stress fittings.. BS 970 (Part 3) 070M20 is defined under British Standards (BS), originating from United Kingdom, while NF A35-551 XC18 is defined under Association Francaise de Normalisation (NF), originating from France.

As per chemical composition, BS 970 (Part 3) 070M20 vs NF A35-551 XC18 is a 91.2% 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 91.2%.

Frequently Compared With BS 970 (Part 3) 070M20:
BS 970 (Part 1) 060A67 BS 970 (Part 1) 060A62 BS 970 (Part 1) 070M20 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 040A04 BS 970 (Part 3) 045A10 BS 970 (Part 1) 060A72 BS 970 (Part 1) 045A10
Match Breakdown
CHEMISTRY MATCH
91.2%
MECHANICAL MATCH
No shared data
OVERALL
91.2%
Specifications
Property BS 970 (Part 3) 070M20 NF A35-551 XC18
Standard BS 970 (Part 3):1991 NF A35-551:1986
Category Carbon Steel Carbon Steel
C (%) 0.16-0.24 0.15-0.21
Si (%) 0.10-0.40 0.10-0.35
Mn (%) 0.50-0.90 0.40-0.70
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) 070M20 NF A35-551 XC18
Tensile Strength Not specified 370-500 MPa
Yield Strength Not specified 220-300 MPa
Elongation Not specified 26-32%
Hardness Not specified 110-150 HB
Typical Applications
BS 970 (Part 3) 070M20
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; carbon and carbon manganese steel (Table 13)
NF A35-551 XC18
Used for shafts, pins, forged parts, welded structures, machine components, and low-stress fittings.
Can BS 970 (Part 3) 070M20 Be Substituted With NF A35-551 XC18?
BS 970 (Part 3) 070M20 and NF A35-551 XC18 overlap closely enough on chemistry and mechanical properties that NF A35-551 XC18 is often considered as a substitute for BS 970 (Part 3) 070M20 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) 070M20
No active listings currently.
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)
On M-EX Right Now
BS 970 (Part 3) 070M20
0 active listings and RFQs →
NF A35-551 XC18
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 3) 070M20 and NF A35-551 XC18?
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) 070M20 be substituted with NF A35-551 XC18?
BS 970 (Part 3) 070M20 and NF A35-551 XC18 overlap closely enough on chemistry and mechanical properties that NF A35-551 XC18 is often considered as a substitute for BS 970 (Part 3) 070M20 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.