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JIS G4202 SACM645 vs SAE J404 4142

Close Alternative — 73.5% match based on chemical composition and mechanical property overlap.

JIS G4202 SACM645 (JIS G 4202:2005) and SAE J404 4142 (SAE J404:2009) are both steel grades. Both fall under the Alloy Steel category. JIS G4202 SACM645 is typically used for nitrided gears, crankshafts, cylinder liners, gauges, while SAE J404 4142 is commonly used for chemistry-only alloy steel grade; see the composition notes for product scope. JIS G4202 SACM645 is defined under Japanese Industrial Standards (JIS), originating from Japan, while SAE J404 4142 is defined under SAE International, originating from United States.

As per chemical composition, JIS G4202 SACM645 vs SAE J404 4142 is a 73.5% 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 73.5%.

Frequently Compared With JIS G4202 SACM645:
NF A35-565 100C6 GB/T 3077 12Cr2Ni4A GOST 4543 12HN3A UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
73.5%
MECHANICAL MATCH
No shared data
OVERALL
73.5%
Specifications
Property JIS G4202 SACM645 SAE J404 4142
Standard JIS G 4202:2005 SAE J404:2009
Category Alloy Steel Alloy Steel
C (%) 0.40–0.50 0.40-0.45
Si (%) 0.15–0.50 0.15-0.35
Mn (%) 0.55–0.90 0.75-1.00
Cr (%) 1.30–1.70 0.80-1.10
Mo (%) 0.15–0.30 0.15-0.25
Al (%) 0.70–1.20 Not specified
P (%) ≤0.030 <=0.030
S (%) ≤0.030 <=0.040
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property JIS G4202 SACM645 SAE J404 4142
Tensile Strength 930–1080 MPa Not specified
Surface Hardness HV ≥900 (nitrided) Not specified
Core Hardness HB 269–321 Not specified
Typical Applications
JIS G4202 SACM645
Nitrided gears, crankshafts, cylinder liners, gauges
SAE J404 4142
Chemistry-only alloy steel grade; see the composition notes for product scope
Key Differences
Can JIS G4202 SACM645 Be Substituted With SAE J404 4142?
JIS G4202 SACM645 and SAE J404 4142 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
JIS G4202 SACM645
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 4600–5900 mm (181.1–232.28 in)
SAE J404 4142
No active listings currently.
On M-EX Right Now
JIS G4202 SACM645
2 active listings and RFQs →
SAE J404 4142
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between JIS G4202 SACM645 and SAE J404 4142?
JIS G4202 SACM645 specifies Al which is not specified for SAE J404 4142.
Can JIS G4202 SACM645 be substituted with SAE J404 4142?
JIS G4202 SACM645 and SAE J404 4142 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.