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SAE J404 4140 vs GOST 4543 12HN3A

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

SAE J404 4140 (SAE J404:2009) and GOST 4543 12HN3A (GOST 4543-2016) are both steel grades. Both fall under the Alloy Steel category. SAE J404 4140 is typically used for gears, shafts, dies, bolts, crankshafts, while GOST 4543 12HN3A is commonly used for used for gears, pinions, crankshafts, aircraft parts, and transmission components.. SAE J404 4140 is defined under SAE International (United States).

As per chemical composition, SAE J404 4140 vs GOST 4543 12HN3A is a 59% 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 4140:
NF A35-565 100C6 UNI 11234 100Cr6 GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 10Cr20Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 IS 11169 (Part 1) 12Cr4Mo2 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 12Cr4Mo5H
Match Breakdown
CHEMISTRY MATCH
59%
MECHANICAL MATCH
No shared data
OVERALL
35%
Specifications
Property SAE J404 4140 GOST 4543 12HN3A
Standard SAE J404:2009 GOST 4543-2016
Category Alloy Steel Alloy Steel
C (%) 0.38-0.43 0.09-0.16
Cr (%) 0.80-1.10 0.6-0.9
Mn (%) 0.75-1.00 0.3-0.6
Mo (%) 0.15-0.25 Not specified
P (%) <=0.030 Not specified
S (%) <=0.040 Not specified
Si (%) 0.15-0.35 0.17-0.37
Ni (%) Not specified 2.75-3.15
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 4140 GOST 4543 12HN3A
Tensile Strength Not specified 850-1050 MPa
Yield Strength Not specified 685 MPa min
Elongation Not specified 11% min
Hardness Not specified 58-62 HRC (case)
Typical Applications
SAE J404 4140
Gears, shafts, dies, bolts, crankshafts
GOST 4543 12HN3A
Used for gears, pinions, crankshafts, aircraft parts, and transmission components.
Key Differences
Can SAE J404 4140 Be Substituted With GOST 4543 12HN3A?
SAE J404 4140 and GOST 4543 12HN3A 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 4140
Round Bar → (20 listings)
Diameter: 40–75 mm (1.57–2.95 in)
Length: 4800–6800 mm (188.98–267.72 in)
Hex Bar → (7 listings)
Across Flats: 40–60 mm (1.57–2.36 in)
Length: 2600–6100 mm (102.36–240.16 in)
Flat Bar → (6 listings)
Thickness: 35–40 mm (1.38–1.57 in)
Width: 180–180 mm (7.09–7.09 in)
Length: 2500–4400 mm (98.43–173.23 in)
GOST 4543 12HN3A
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5600–6600 mm (220.47–259.84 in)
On M-EX Right Now
SAE J404 4140
33 active listings and RFQs →
GOST 4543 12HN3A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between SAE J404 4140 and GOST 4543 12HN3A?
SAE J404 4140 specifies Mo, P, S which are not specified for GOST 4543 12HN3A. GOST 4543 12HN3A specifies Ni which is not specified for SAE J404 4140.
Can SAE J404 4140 be substituted with GOST 4543 12HN3A?
SAE J404 4140 and GOST 4543 12HN3A 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.