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KS D3867 SCM415 vs IS 4367 21Cr4Mo2

Close Alternative — 79.9% match based on chemical composition and mechanical property overlap.

KS D3867 SCM415 (KS D 3867:2025) and IS 4367 21Cr4Mo2 (IS 4367:1991) are both steel grades. Both fall under the Alloy Steel category. KS D3867 SCM415 is typically used for gears, shafts, camshafts, piston pins, precision machine components requiring hard surface and tough core., while IS 4367 21Cr4Mo2 is commonly used for gears, shafts, studs, bolts, automotive transmission components, high-strength fasteners.. KS D3867 SCM415 is defined under Korean Industrial Standards (KS), originating from South Korea, while IS 4367 21Cr4Mo2 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, KS D3867 SCM415 vs IS 4367 21Cr4Mo2 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%.

Frequently Compared With KS D3867 SCM415:
NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 7) 12Cr4Mo5H GOST 4543 12HN3A IS 11169 (Part 1) 12Cr4Mo2 GB/T 3077 12Cr2Ni4A IS 1570 (Part 7) 12Cr9Mo10H IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Mo6H IS 1570 (Part 4) 07Cr4Mo6
Match Breakdown
CHEMISTRY MATCH
79.9%
MECHANICAL MATCH
No shared data
OVERALL
79.9%
Specifications
Property KS D3867 SCM415 IS 4367 21Cr4Mo2
Standard KS D 3867:2025 IS 4367:1991
Category Alloy Steel Alloy Steel
C (%) 0.17-0.23 <=0.26
Mn (%) 0.6-1.2 0.50-0.80
Si (%) 0.1-0.35 0.10-0.35
P (%) max 0.03 <=0.035
S (%) max 0.03 <=0.035
Cr (%) 0.15-0.35 0.90-1.20
Mo (%) 0.15-0.3 0.15-0.30
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property KS D3867 SCM415 IS 4367 21Cr4Mo2
Tensile Strength Not specified 650-800 MPa
Yield Strength Not specified 420 MPa min
Elongation Not specified >=16%
Izod Impact Not specified 60 J min
Hardness Not specified 190-235 HB
Hardness (soft annealed) Not specified <=210 HB
Condition Not specified Hardened and tempered, ruling section up to 150 mm
Typical Applications
KS D3867 SCM415
Gears, shafts, camshafts, piston pins, precision machine components requiring hard surface and tough core.
IS 4367 21Cr4Mo2
Gears, shafts, studs, bolts, automotive transmission components, high-strength fasteners.
Can KS D3867 SCM415 Be Substituted With IS 4367 21Cr4Mo2?
KS D3867 SCM415 and IS 4367 21Cr4Mo2 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.
Forms & Sizes Available on M-EX
KS D3867 SCM415
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5200–5700 mm (204.72–224.41 in)
IS 4367 21Cr4Mo2
Round Bar → (4 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5400–7000 mm (212.6–275.59 in)
On M-EX Right Now
KS D3867 SCM415
2 active listings and RFQs →
IS 4367 21Cr4Mo2
4 active listings and RFQs →
Frequently Asked Questions
What is the difference between KS D3867 SCM415 and IS 4367 21Cr4Mo2?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can KS D3867 SCM415 be substituted with IS 4367 21Cr4Mo2?
KS D3867 SCM415 and IS 4367 21Cr4Mo2 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.