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JIS G4105 SCM440 vs GOST 4543 12HN3A

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

JIS G4105 SCM440 (JIS G4105:1979) and GOST 4543 12HN3A (GOST 4543-2016) are both steel grades. Both fall under the Alloy Steel category. JIS G4105 SCM440 is typically used for automotive parts, gears, shafts, bolts, dies, while GOST 4543 12HN3A is commonly used for used for gears, pinions, crankshafts, aircraft parts, and transmission components.. JIS G4105 SCM440 is defined under Japanese Industrial Standards (JIS) (Japan).

As per chemical composition, JIS G4105 SCM440 vs GOST 4543 12HN3A is a 59% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With JIS G4105 SCM440:
GB/T 3077 12Cr2Ni4A UNI 11234 100Cr6 NF A35-565 100C6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr6
Match Breakdown
CHEMISTRY MATCH
59%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property JIS G4105 SCM440 GOST 4543 12HN3A
Standard JIS G4105:1979 GOST 4543-2016
Category Alloy Steel Alloy Steel
C (%) 0.38–0.43 0.09-0.16
Si (%) 0.15–0.35 0.17-0.37
Mn (%) 0.60–0.90 0.3-0.6
Cr (%) 0.90–1.20 0.6-0.9
Mo (%) 0.15–0.30 Not specified
S (%) ≤0.030 Not specified
P (%) ≤0.030 Not specified
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 JIS G4105 SCM440 GOST 4543 12HN3A
Tensile Strength ≥930 MPa 850-1050 MPa
Yield Strength ≥785 MPa 685 MPa min
Elongation ≥12% 11% min
Hardness 269–331 HB 58-62 HRC (case)
Typical Applications
JIS G4105 SCM440
Automotive parts, gears, shafts, bolts, dies
GOST 4543 12HN3A
Used for gears, pinions, crankshafts, aircraft parts, and transmission components.
Key Differences
Can JIS G4105 SCM440 Be Substituted With GOST 4543 12HN3A?
JIS G4105 SCM440 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
JIS G4105 SCM440
Round Bar → (3 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5400–7000 mm (212.6–275.59 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
JIS G4105 SCM440
3 active listings and RFQs →
GOST 4543 12HN3A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between JIS G4105 SCM440 and GOST 4543 12HN3A?
JIS G4105 SCM440 specifies Mo, S, P which are not specified for GOST 4543 12HN3A. GOST 4543 12HN3A specifies Ni which is not specified for JIS G4105 SCM440.
Can JIS G4105 SCM440 be substituted with GOST 4543 12HN3A?
JIS G4105 SCM440 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.