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JIS G4051 S45C vs SAE J403 1042

Strong Match — 89.1% match based on chemical composition and mechanical property overlap.

JIS G4051 S45C (JIS G4051:2009) and SAE J403 1042 (SAE J403:2014) are both steel grades. Both fall under the Carbon Steel category. JIS G4051 S45C is typically used for shafts, gears, bolts, machine parts, keys, while SAE J403 1042 is commonly used for chemistry-only grade; product scope as listed in the composition notes. JIS G4051 S45C is defined under Japanese Industrial Standards (JIS), originating from Japan, while SAE J403 1042 is defined under SAE International, originating from United States.

As per chemical composition, JIS G4051 S45C vs SAE J403 1042 is a 89.1% 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 89.1%.

Frequently Compared With JIS G4051 S45C:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 055M15
Match Breakdown
CHEMISTRY MATCH
89.1%
MECHANICAL MATCH
No shared data
OVERALL
89.1%
Specifications
Property JIS G4051 S45C SAE J403 1042
Standard JIS G4051:2009 SAE J403:2014
Category Carbon Steel Carbon Steel
C (%) 0.42-0.48 0.40-0.47
Si (%) 0.15-0.35 Not specified
Mn (%) 0.60-0.90 0.60-0.90
S (%) <=0.035 <=0.035 (flat rolled), <=0.050 (long products)
P (%) <=0.030 <=0.030 (flat rolled), <=0.040 (long products)
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property JIS G4051 S45C SAE J403 1042
Tensile Strength >=570 MPa Not specified
Yield Strength >=430 MPa Not specified
Elongation >=17% Not specified
Hardness 167-229 HB Not specified
Typical Applications
JIS G4051 S45C
Shafts, gears, bolts, machine parts, keys
SAE J403 1042
Chemistry-only grade; product scope as listed in the composition notes
Key Differences
Can JIS G4051 S45C Be Substituted With SAE J403 1042?
JIS G4051 S45C and SAE J403 1042 overlap closely enough on chemistry and mechanical properties that SAE J403 1042 is often considered as a substitute for JIS G4051 S45C 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 G4051 S45C
Round Bar → (6 listings)
Diameter: 7.5–40 mm (0.3–1.57 in)
Length: 5400–7000 mm (212.6–275.59 in)
SAE J403 1042
Round Bar → (6 listings)
Diameter: 7–9.525 mm (0.28–0.38 in)
Length: 3500–7000 mm (137.8–275.59 in)
On M-EX Right Now
JIS G4051 S45C
6 active listings and RFQs →
SAE J403 1042
6 active listings and RFQs →
Frequently Asked Questions
What is the difference between JIS G4051 S45C and SAE J403 1042?
JIS G4051 S45C specifies Si which is not specified for SAE J403 1042.
Can JIS G4051 S45C be substituted with SAE J403 1042?
JIS G4051 S45C and SAE J403 1042 overlap closely enough on chemistry and mechanical properties that SAE J403 1042 is often considered as a substitute for JIS G4051 S45C in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.