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ISO 683-17 20NiCrMo7 vs GOST 4543 12HN3A

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

ISO 683-17 20NiCrMo7 (ISO 683-17:1999) and GOST 4543 12HN3A (GOST 4543-2016) are both steel grades. Both fall under the Alloy Steel category. ISO 683-17 20NiCrMo7 is typically used for used in large gears, turbine shafts, marine gearboxes, heavy-duty pinions, and industrial transmissions., while GOST 4543 12HN3A is commonly used for used for gears, pinions, crankshafts, aircraft parts, and transmission components.. ISO 683-17 20NiCrMo7 is defined under International Organization for Standardization (ISO) (International).

As per chemical composition, ISO 683-17 20NiCrMo7 vs GOST 4543 12HN3A is a 58.7% match. As per mechanical properties, the match is 2.8%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With ISO 683-17 20NiCrMo7:
UNI 11234 100Cr6 NF A35-565 100C6 GB/T 3077 12Cr2Ni4A IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10
Other Alloy Steel Grades to Compare With ISO 683-17 20NiCrMo7:
EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
58.7%
MECHANICAL MATCH
2.8%
OVERALL
35%
Specifications
Property ISO 683-17 20NiCrMo7 GOST 4543 12HN3A
Standard ISO 683-17:1999 GOST 4543-2016
Category Alloy Steel Alloy Steel
C (%) 0.17-0.22 0.09-0.16
Si (%) 0.15-0.30 0.17-0.37
Mn (%) 0.45-0.65 0.3-0.6
Cr (%) 0.40-0.60 0.6-0.9
Mo (%) 0.20-0.30 Not specified
Ni (%) 1.65-2.00 2.75-3.15
P (%) <=0.035 Not specified
S (%) <=0.040 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 ISO 683-17 20NiCrMo7 GOST 4543 12HN3A
Tensile Strength 1000-1300 MPa 850-1050 MPa
Yield Strength 800 MPa min 685 MPa min
Elongation 9-12% 11% min
Hardness 300-360 HB 58-62 HRC (case)
Typical Applications
ISO 683-17 20NiCrMo7
Used in large gears, turbine shafts, marine gearboxes, heavy-duty pinions, and industrial transmissions.
GOST 4543 12HN3A
Used for gears, pinions, crankshafts, aircraft parts, and transmission components.
Key Differences
Can ISO 683-17 20NiCrMo7 Be Substituted With GOST 4543 12HN3A?
ISO 683-17 20NiCrMo7 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
ISO 683-17 20NiCrMo7
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6600–7000 mm (259.84–275.59 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
ISO 683-17 20NiCrMo7
2 active listings and RFQs →
GOST 4543 12HN3A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between ISO 683-17 20NiCrMo7 and GOST 4543 12HN3A?
ISO 683-17 20NiCrMo7 specifies Mo, P, S which are not specified for GOST 4543 12HN3A.
Can ISO 683-17 20NiCrMo7 be substituted with GOST 4543 12HN3A?
ISO 683-17 20NiCrMo7 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.