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KS D3867 SCM440 vs GB/T 3077 12Cr2Ni4A

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

KS D3867 SCM440 (KS D 3867:2025) and GB/T 3077 12Cr2Ni4A (GB/T 3077-2015) are both steel grades. Both fall under the Alloy Steel category. KS D3867 SCM440 is typically used for shafts,gears,axles,bolts,automotive parts,machine components,spindles,hydraulic parts, while GB/T 3077 12Cr2Ni4A is commonly used for used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.. KS D3867 SCM440 is defined under Korean Industrial Standards (KS), originating from South Korea, while GB/T 3077 12Cr2Ni4A is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, KS D3867 SCM440 vs GB/T 3077 12Cr2Ni4A is a 58% match. As per mechanical properties, the match is 33.5%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With KS D3867 SCM440:
NF A35-565 100C6 GOST 4543 12HN3A IS 1570 (Part 4) 103Cr6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 UNI 11234 100Cr6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
58%
MECHANICAL MATCH
33.5%
OVERALL
35%
Specifications
Property KS D3867 SCM440 GB/T 3077 12Cr2Ni4A
Standard KS D 3867:2025 GB/T 3077-2015
Category Alloy Steel Alloy Steel
C (%) 0.38-0.43 0.10-0.15
Si (%) 0.15-0.35 0.17-0.37
Mn (%) 0.60-0.85 0.30-0.60
P (%) <=0.030 0.025 max
S (%) <=0.030 0.025 max
Cr (%) 0.90-1.20 1.25-1.65
Mo (%) 0.15-0.30 Not specified
Ni (%) Not specified 3.25-3.75
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 SCM440 GB/T 3077 12Cr2Ni4A
Tensile Strength 900-1100 MPa 980-1180 MPa
Yield Strength 700-900 MPa 785-980 MPa
Elongation 11-16 % 10-14%
Hardness 248-320 HB 58-62 HRC (case)
Typical Applications
KS D3867 SCM440
shafts,gears,axles,bolts,automotive parts,machine components,spindles,hydraulic parts
GB/T 3077 12Cr2Ni4A
Used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.
Key Differences
Can KS D3867 SCM440 Be Substituted With GB/T 3077 12Cr2Ni4A?
KS D3867 SCM440 and GB/T 3077 12Cr2Ni4A 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.
Forms & Sizes Available on M-EX
KS D3867 SCM440
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6000–6500 mm (236.22–255.91 in)
GB/T 3077 12Cr2Ni4A
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5000–6600 mm (196.85–259.84 in)
On M-EX Right Now
KS D3867 SCM440
2 active listings and RFQs →
GB/T 3077 12Cr2Ni4A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between KS D3867 SCM440 and GB/T 3077 12Cr2Ni4A?
KS D3867 SCM440 specifies Mo which is not specified for GB/T 3077 12Cr2Ni4A. GB/T 3077 12Cr2Ni4A specifies Ni which is not specified for KS D3867 SCM440.
Can KS D3867 SCM440 be substituted with GB/T 3077 12Cr2Ni4A?
KS D3867 SCM440 and GB/T 3077 12Cr2Ni4A 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.