Minimal Match — 35% match
based on chemical composition and mechanical property overlap.
IS 4367 20NiCrMo2 (IS 4367:1991) and GOST 4543 12HN3A (GOST 4543-2016) are both steel grades.
Both fall under the Alloy Steel category.
IS 4367 20NiCrMo2 is typically used for nickel-chromium-molybdenum case-hardening steel; used for highly stressed gears, shafts, and transmission components requiring high core strength, toughness, and wear-resistant carburized surface, while GOST 4543 12HN3A is commonly used for used for gears, pinions, crankshafts, aircraft parts, and transmission components..
IS 4367 20NiCrMo2 is defined under Bureau of Indian Standards (IS) (India).
As per chemical composition, IS 4367 20NiCrMo2 vs GOST 4543 12HN3A is a 56.9% match.
As per mechanical properties, the match is 33.3%.
Combined, this makes them a minimal match overall at 35%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
IS 4367 20NiCrMo2
GOST 4543 12HN3A
Tensile Strength
900 MPa min
850-1050 MPa
Elongation
>=11%
11% min
Izod Impact
41 J min
Not specified
Hardness (soft annealed)
<=213 HB
Not specified
Condition
Refined, quenched and stress relieved (core properties), ruling section up to 30 mm
Not specified
Yield Strength
Not specified
685 MPa min
Hardness
Not specified
58-62 HRC (case)
Typical Applications
IS 4367 20NiCrMo2
Nickel-chromium-molybdenum case-hardening steel; used for highly stressed gears, shafts, and transmission components requiring high core strength, toughness, and wear-resistant carburized surface
GOST 4543 12HN3A
Used for gears, pinions, crankshafts, aircraft parts, and transmission components.
Key Differences
IS 4367 20NiCrMo2 specifies Mo, S, P which are not specified for GOST 4543 12HN3A.
Can IS 4367 20NiCrMo2 Be Substituted With GOST 4543 12HN3A?
IS 4367 20NiCrMo2 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.
What is the difference between IS 4367 20NiCrMo2 and GOST 4543 12HN3A?
IS 4367 20NiCrMo2 specifies Mo, S, P which are not specified for GOST 4543 12HN3A.
Can IS 4367 20NiCrMo2 be substituted with GOST 4543 12HN3A?
IS 4367 20NiCrMo2 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.