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AISI 8620 vs GOST 4543 12HN3A

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

AISI 8620 and GOST 4543 12HN3A (GOST 4543-2016) are both steel grades. Both fall under the Alloy Steel category. AISI 8620 is typically used for used for gears, shafts, sprockets, pinions, bushings, and transmission components., while GOST 4543 12HN3A is commonly used for used for gears, pinions, crankshafts, aircraft parts, and transmission components.. AISI 8620 is defined under AISI (United States).

As per chemical composition, AISI 8620 vs GOST 4543 12HN3A is a 57.5% match. As per mechanical properties, the match is 10.8%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With AISI 8620:
NF A35-565 100C6 UNI 11234 100Cr6 GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
57.5%
MECHANICAL MATCH
10.8%
OVERALL
35%
Specifications
Property AISI 8620 GOST 4543 12HN3A
Standard AISI GOST 4543-2016
Category Alloy Steel Alloy Steel
C (%) 0.18-0.23 0.09-0.16
Mn (%) 0.70-0.90 0.3-0.6
Si (%) 0.15-0.35 0.17-0.37
Ni (%) 0.40-0.70 2.75-3.15
Cr (%) 0.40-0.60 0.6-0.9
Mo (%) 0.15-0.25 Not specified
P (%) 0.035 max Not specified
S (%) 0.040 max Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property AISI 8620 GOST 4543 12HN3A
Tensile Strength 750-980 MPa 850-1050 MPa
Yield Strength 550-780 MPa 685 MPa min
Elongation 12-18% 11% min
Hardness 200-280 HB 58-62 HRC (case)
Typical Applications
AISI 8620
Used for gears, shafts, sprockets, pinions, bushings, and transmission components.
GOST 4543 12HN3A
Used for gears, pinions, crankshafts, aircraft parts, and transmission components.
Key Differences
Can AISI 8620 Be Substituted With GOST 4543 12HN3A?
AISI 8620 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
AISI 8620
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6600–6900 mm (259.84–271.65 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
AISI 8620
2 active listings and RFQs →
GOST 4543 12HN3A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between AISI 8620 and GOST 4543 12HN3A?
AISI 8620 specifies Mo, P, S which are not specified for GOST 4543 12HN3A.
Can AISI 8620 be substituted with GOST 4543 12HN3A?
AISI 8620 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.