Post Stock Login Register

KS D3867 SCM415 vs IS 1570 (Part 4) 21Cr4Mo2

Close Alternative — 79.7% match based on chemical composition and mechanical property overlap.

KS D3867 SCM415 (KS D 3867:2025) and IS 1570 (Part 4) 21Cr4Mo2 (IS 1570 (Part 4):1988) are both steel grades. Both fall under the Alloy Steel category. KS D3867 SCM415 is defined under Korean Industrial Standards (KS), originating from South Korea, while IS 1570 (Part 4) 21Cr4Mo2 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, KS D3867 SCM415 vs IS 1570 (Part 4) 21Cr4Mo2 is a 79.7% 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 79.7%.

Frequently Compared With KS D3867 SCM415:
UNI 11234 100Cr6 NF A35-565 100C6 GOST 4543 12HN3A IS 1570 (Part 7) 12Cr4Mo5H 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
79.7%
MECHANICAL MATCH
No shared data
OVERALL
79.7%
Specifications
Property KS D3867 SCM415 IS 1570 (Part 4) 21Cr4Mo2
Standard KS D 3867:2025 IS 1570 (Part 4):1988
Category Alloy Steel Alloy Steel
C (%) 0.17-0.23 <=0.26
Mn (%) 0.6-1.2 0.60-0.90
Si (%) 0.1-0.35 0.10-0.35
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 IS 1570 (Part 4) 21Cr4Mo2
Tensile Strength Not specified 790-990 MPa
Yield Strength Not specified >=610 MPa
Condition Not specified Sheet and strip, hardened and tempered or cold rolled and tempered
Typical Applications
KS D3867 SCM415
Gears, shafts, camshafts, piston pins, precision machine components requiring hard surface and tough core.
IS 1570 (Part 4) 21Cr4Mo2
Not documented
Key Differences
Can KS D3867 SCM415 Be Substituted With IS 1570 (Part 4) 21Cr4Mo2?
KS D3867 SCM415 and IS 1570 (Part 4) 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 1570 (Part 4) 21Cr4Mo2
No active listings currently.
On M-EX Right Now
KS D3867 SCM415
2 active listings and RFQs →
IS 1570 (Part 4) 21Cr4Mo2
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between KS D3867 SCM415 and IS 1570 (Part 4) 21Cr4Mo2?
KS D3867 SCM415 specifies P, S which are not specified for IS 1570 (Part 4) 21Cr4Mo2.
Can KS D3867 SCM415 be substituted with IS 1570 (Part 4) 21Cr4Mo2?
KS D3867 SCM415 and IS 1570 (Part 4) 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.