SAE J404 4340 vs NF A35-565 100C6

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

SAE J404 4340 (SAE J404:2009) and NF A35-565 100C6 are both steel grades. Both fall under the Alloy Steel category. SAE J404 4340 is typically used for aircraft parts, heavy duty gears, crankshafts, while NF A35-565 100C6 is commonly used for ball bearings, roller bearings, bearing races, rollers, precision tools, wear resistant parts. SAE J404 4340 is defined under SAE International, originating from United States, while NF A35-565 100C6 is defined under Association Francaise de Normalisation (NF), originating from France.

As per chemical composition, SAE J404 4340 vs NF A35-565 100C6 is a 58.6% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With SAE J404 4340:
GB/T 3077 12Cr2Ni4A GOST 4543 12HN3A UNI 11234 100Cr6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 4367 10Cr9Mo10 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
58.6%
MECHANICAL MATCH
No shared data
OVERALL
35%
Specifications
Property SAE J404 4340 NF A35-565 100C6
Standard SAE J404:2009 NF A35-565
Category Alloy Steel Alloy Steel
C (%) 0.38-0.43 0.95-1.05
Cr (%) 0.70-0.90 1.35-1.65
Mn (%) 0.60-0.80 0.25-0.45
Mo (%) 0.20-0.30 Not specified
Ni (%) 1.65-2.00 Not specified
P (%) <=0.030 <=0.027
S (%) <=0.040 <=0.025
Si (%) 0.15-0.35 0.15-0.35
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property SAE J404 4340 NF A35-565 100C6
Tensile Strength Not specified 850-1100 MPa
Hardness Not specified 60-66 HRC
Typical Applications
SAE J404 4340
Aircraft parts, heavy duty gears, crankshafts
NF A35-565 100C6
ball bearings, roller bearings, bearing races, rollers, precision tools, wear resistant parts
Key Differences
Can SAE J404 4340 Be Substituted With NF A35-565 100C6?
SAE J404 4340 and NF A35-565 100C6 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
Forms & Sizes Available on M-EX
SAE J404 4340
Round Bar → (25 listings)
Diameter: 50–100 mm (1.97–3.94 in)
Length: 3800–7000 mm (149.61–275.59 in)
Forging → (4 listings)
Diameter: 150–200 mm (5.91–7.87 in)
Length: 500–1500 mm (19.69–59.06 in)
Flat Bar → (3 listings)
Thickness: 30–30 mm (1.18–1.18 in)
Width: 120–120 mm (4.72–4.72 in)
Length: 2500–3000 mm (98.43–118.11 in)
NF A35-565 100C6
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6700–6700 mm (263.78–263.78 in)
On M-EX Right Now
SAE J404 4340
32 active listings and RFQs →
NF A35-565 100C6
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between SAE J404 4340 and NF A35-565 100C6?
SAE J404 4340 specifies Mo, Ni which are not specified for NF A35-565 100C6.
Can SAE J404 4340 be substituted with NF A35-565 100C6?
SAE J404 4340 and NF A35-565 100C6 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.