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JIS G4105 SCM440 vs SAE J404 4140

Strong Match — 87.6% match based on chemical composition and mechanical property overlap.

JIS G4105 SCM440 (JIS G4105:1979) and SAE J404 4140 (SAE J404:2000) are both steel grades. Both fall under the Alloy Steel category. JIS G4105 SCM440 is typically used for automotive parts, gears, shafts, bolts, dies, while SAE J404 4140 is commonly used for chemistry-only alloy steel grade; see the composition notes for product scope. JIS G4105 SCM440 is defined under Japanese Industrial Standards (JIS), originating from Japan, while SAE J404 4140 is defined under SAE International, originating from United States.

As per chemical composition, JIS G4105 SCM440 vs SAE J404 4140 is a 87.6% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 87.6%.

Frequently Compared With JIS G4105 SCM440:
GB/T 3077 12Cr2Ni4A GOST 4543 12HN3A UNI 11234 100Cr6 NF A35-565 100C6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 10Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 4367 07Cr4Mo6
Match Breakdown
CHEMISTRY MATCH
87.6%
MECHANICAL MATCH
No shared data
OVERALL
87.6%
Specifications
Property JIS G4105 SCM440 SAE J404 4140
Standard JIS G4105:1979 SAE J404:2000
Category Alloy Steel Alloy Steel
C (%) 0.38–0.43 0.38-0.43
Si (%) 0.15–0.35 0.15-0.35
Mn (%) 0.60–0.90 0.75-1.00
Cr (%) 0.90–1.20 0.80-1.10
Mo (%) 0.15–0.30 0.15-0.25
S (%) ≤0.030 <=0.040
P (%) ≤0.030 <=0.030
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property JIS G4105 SCM440 SAE J404 4140
Tensile Strength ≥930 MPa Not specified
Yield Strength ≥785 MPa Not specified
Elongation ≥12% Not specified
Hardness 269–331 HB Not specified
Typical Applications
JIS G4105 SCM440
Automotive parts, gears, shafts, bolts, dies
SAE J404 4140
Chemistry-only alloy steel grade; see the composition notes for product scope
Can JIS G4105 SCM440 Be Substituted With SAE J404 4140?
JIS G4105 SCM440 and SAE J404 4140 overlap closely enough on chemistry and mechanical properties that SAE J404 4140 is often considered as a substitute for JIS G4105 SCM440 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
JIS G4105 SCM440
Round Bar → (3 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5400–7000 mm (212.6–275.59 in)
SAE J404 4140
No active listings currently.
On M-EX Right Now
JIS G4105 SCM440
3 active listings and RFQs →
SAE J404 4140
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Frequently Asked Questions
What is the difference between JIS G4105 SCM440 and SAE J404 4140?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can JIS G4105 SCM440 be substituted with SAE J404 4140?
JIS G4105 SCM440 and SAE J404 4140 overlap closely enough on chemistry and mechanical properties that SAE J404 4140 is often considered as a substitute for JIS G4105 SCM440 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.