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NF A35-565 16NC11 vs BS 970 (Part 3) 637M17

Close Alternative — 81.5% match based on chemical composition and mechanical property overlap.

NF A35-565 16NC11 and BS 970 (Part 3) 637M17 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Alloy Steel category. NF A35-565 16NC11 is typically used for used for gears, pinions, shafts, cam components, transmission parts, and carburized machine elements., while BS 970 (Part 3) 637M17 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy case hardening steel (table 15). NF A35-565 16NC11 is defined under Association Francaise de Normalisation (NF), originating from France, while BS 970 (Part 3) 637M17 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, NF A35-565 16NC11 vs BS 970 (Part 3) 637M17 is a 81.5% 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 81.5%.

Frequently Compared With NF A35-565 16NC11:
GOST 4543 12HN3A NF A35-565 100C6 GB/T 3077 12Cr2Ni4A UNI 11234 100Cr6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 105Cr5 IS 4367 10Cr9Mo10 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr4
Match Breakdown
CHEMISTRY MATCH
81.5%
MECHANICAL MATCH
No shared data
OVERALL
81.5%
Specifications
Property NF A35-565 16NC11 BS 970 (Part 3) 637M17
Standard NF A35-565 BS 970 (Part 3):1991
Category Alloy Steel Alloy Steel
C (%) 0.13-0.18 0.14-0.20
Si (%) 0.10-0.40 0.10-0.40
Mn (%) 0.40-0.70 0.60-0.90
Ni (%) 0.80-1.20 0.85-1.25
Cr (%) 0.40-0.70 0.60-1.00
P (%) 0.035 max <=0.04
S (%) 0.035 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 A35-565 16NC11 BS 970 (Part 3) 637M17
Tensile Strength 700-900 MPa Not specified
Yield Strength 450-650 MPa Not specified
Elongation 12-18% Not specified
Hardness 58-62 HRC (case) Not specified
Typical Applications
NF A35-565 16NC11
Used for gears, pinions, shafts, cam components, transmission parts, and carburized machine elements.
BS 970 (Part 3) 637M17
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy case hardening steel (Table 15)
Can NF A35-565 16NC11 Be Substituted With BS 970 (Part 3) 637M17?
NF A35-565 16NC11 and BS 970 (Part 3) 637M17 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 A35-565 16NC11
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5200–5400 mm (204.72–212.6 in)
BS 970 (Part 3) 637M17
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On M-EX Right Now
NF A35-565 16NC11
2 active listings and RFQs →
BS 970 (Part 3) 637M17
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Frequently Asked Questions
What is the difference between NF A35-565 16NC11 and BS 970 (Part 3) 637M17?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can NF A35-565 16NC11 be substituted with BS 970 (Part 3) 637M17?
NF A35-565 16NC11 and BS 970 (Part 3) 637M17 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.