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KS D3867 SCM415 vs JIS G4105 SCM420

Close Alternative — 83.7% match based on chemical composition and mechanical property overlap.

KS D3867 SCM415 (KS D 3867:2025) and JIS G4105 SCM420 (JIS G4105:1979) 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 JIS G4105 SCM420 is commonly used for case hardened gears, cams, pins, shafts. KS D3867 SCM415 is defined under Korean Industrial Standards (KS), originating from South Korea, while JIS G4105 SCM420 is defined under Japanese Industrial Standards (JIS), originating from Japan.

As per chemical composition, KS D3867 SCM415 vs JIS G4105 SCM420 is a 83.7% 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 83.7%.

Frequently Compared With KS D3867 SCM415:
UNI 11234 100Cr6 NF A35-565 100C6 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
83.7%
MECHANICAL MATCH
No shared data
OVERALL
83.7%
Specifications
Property KS D3867 SCM415 JIS G4105 SCM420
Standard KS D 3867:2025 JIS G4105:1979
Category Alloy Steel Alloy Steel
C (%) 0.17-0.23 0.18–0.23
Mn (%) 0.6-1.2 0.60–0.90
Si (%) 0.1-0.35 0.15–0.35
P (%) max 0.03 Not specified
S (%) max 0.03 Not specified
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 JIS G4105 SCM420
Tensile Strength Not specified ≥830 MPa
Case Hardness HRC Not specified 58–62
Core Hardness HB Not specified 235–293
Typical Applications
KS D3867 SCM415
Gears, shafts, camshafts, piston pins, precision machine components requiring hard surface and tough core.
JIS G4105 SCM420
Case hardened gears, cams, pins, shafts
Key Differences
Can KS D3867 SCM415 Be Substituted With JIS G4105 SCM420?
KS D3867 SCM415 and JIS G4105 SCM420 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)
JIS G4105 SCM420
Round Bar → (3 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 4800–6400 mm (188.98–251.97 in)
On M-EX Right Now
KS D3867 SCM415
2 active listings and RFQs →
JIS G4105 SCM420
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between KS D3867 SCM415 and JIS G4105 SCM420?
KS D3867 SCM415 specifies P, S which are not specified for JIS G4105 SCM420.
Can KS D3867 SCM415 be substituted with JIS G4105 SCM420?
KS D3867 SCM415 and JIS G4105 SCM420 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.