Close Alternative — 79.9% match
based on chemical composition and mechanical property overlap.
IS 4367 21Cr4Mo2 (IS 4367:1991) and KS D3867 SCM415 (KS D 3867:2025) are both steel grades.
Both fall under the Alloy Steel category.
IS 4367 21Cr4Mo2 is typically used for gears, shafts, studs, bolts, automotive transmission components, high-strength fasteners., while KS D3867 SCM415 is commonly used for gears, shafts, camshafts, piston pins, precision machine components requiring hard surface and tough core..
IS 4367 21Cr4Mo2 is defined under Bureau of Indian Standards (IS), originating from India, while KS D3867 SCM415 is defined under Korean Industrial Standards (KS), originating from South Korea.
As per chemical composition, IS 4367 21Cr4Mo2 vs KS D3867 SCM415 is a 79.9% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a close alternative overall at 79.9%.
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 21Cr4Mo2
KS D3867 SCM415
Tensile Strength
650-800 MPa
Not specified
Yield Strength
420 MPa min
Not specified
Elongation
>=16%
Not specified
Izod Impact
60 J min
Not specified
Hardness
190-235 HB
Not specified
Hardness (soft annealed)
<=210 HB
Not specified
Condition
Hardened and tempered, ruling section up to 150 mm
Gears, shafts, camshafts, piston pins, precision machine components requiring hard surface and tough core.
Can IS 4367 21Cr4Mo2 Be Substituted With KS D3867 SCM415?
IS 4367 21Cr4Mo2 and KS D3867 SCM415 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
What is the difference between IS 4367 21Cr4Mo2 and KS D3867 SCM415?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 4367 21Cr4Mo2 be substituted with KS D3867 SCM415?
IS 4367 21Cr4Mo2 and KS D3867 SCM415 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.