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NF A35-552 35CD4 vs BS 970 (Part 1) 708A37

Close Alternative — 82.5% match based on chemical composition and mechanical property overlap.

NF A35-552 35CD4 (NF A35-552:1986) and BS 970 (Part 1) 708A37 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. NF A35-552 35CD4 is typically used for gears, shafts, axles, connecting rods, high strength bolts, automotive parts, while BS 970 (Part 1) 708A37 is commonly used for used for gears, shafts, studs, machine spindles, crankshafts, and automotive components.. NF A35-552 35CD4 is defined under Association Francaise de Normalisation (NF), originating from France, while BS 970 (Part 1) 708A37 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, NF A35-552 35CD4 vs BS 970 (Part 1) 708A37 is a 82.5% 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 82.5%.

Frequently Compared With NF A35-552 35CD4:
NF A35-565 100C6 GOST 4543 12HN3A UNI 11234 100Cr6 GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 07Cr4Mo6
Match Breakdown
CHEMISTRY MATCH
82.5%
MECHANICAL MATCH
No shared data
OVERALL
82.5%
Specifications
Property NF A35-552 35CD4 BS 970 (Part 1) 708A37
Standard NF A35-552:1986 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.32-0.39 0.35-0.40
Si (%) 0.15-0.40 Not specified
Mn (%) 0.50-0.80 0.70-0.90
S (%) <=0.035 <=0.040
P (%) <=0.035 <=0.035
Cr (%) 0.90-1.20 0.90-1.20
Mo (%) 0.15-0.30 0.15-0.25
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 35CD4 BS 970 (Part 1) 708A37
Tensile Strength 850-1000 MPa Not specified
Yield Strength >=650 MPa Not specified
Elongation >=14% Not specified
Hardness 248-302 HB Not specified
Typical Applications
NF A35-552 35CD4
gears, shafts, axles, connecting rods, high strength bolts, automotive parts
BS 970 (Part 1) 708A37
Used for gears, shafts, studs, machine spindles, crankshafts, and automotive components.
Key Differences
Can NF A35-552 35CD4 Be Substituted With BS 970 (Part 1) 708A37?
NF A35-552 35CD4 and BS 970 (Part 1) 708A37 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 35CD4
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5000–6200 mm (196.85–244.09 in)
BS 970 (Part 1) 708A37
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6700–7000 mm (263.78–275.59 in)
On M-EX Right Now
NF A35-552 35CD4
2 active listings and RFQs →
BS 970 (Part 1) 708A37
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between NF A35-552 35CD4 and BS 970 (Part 1) 708A37?
NF A35-552 35CD4 specifies Si which is not specified for BS 970 (Part 1) 708A37.
Can NF A35-552 35CD4 be substituted with BS 970 (Part 1) 708A37?
NF A35-552 35CD4 and BS 970 (Part 1) 708A37 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.