Strong Match — 98% match
based on chemical composition and mechanical property overlap.
SAE J403 1144 (SAE J403:2014) and JIS G4804 SUM43 (JIS G 4804:2021) are both steel grades.
Both fall under the Free Machining Steel category.
SAE J403 1144 is typically used for chemistry-only grade; product scope as listed in the composition notes, while JIS G4804 SUM43 is commonly used for high speed automatic machining, automotive parts.
SAE J403 1144 is defined under SAE International, originating from United States, while JIS G4804 SUM43 is defined under Japanese Industrial Standards (JIS), originating from Japan.
As per chemical composition, SAE J403 1144 vs JIS G4804 SUM43 is a 98% 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 98%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
SAE J403 1144
JIS G4804 SUM43
Tensile Strength
Not specified
540–690 MPa
Elongation
Not specified
≥9%
Hardness
Not specified
163–207 HB
Typical Applications
SAE J403 1144
Chemistry-only grade; product scope as listed in the composition notes
JIS G4804 SUM43
High speed automatic machining, automotive parts
Can SAE J403 1144 Be Substituted With JIS G4804 SUM43?
SAE J403 1144 and JIS G4804 SUM43 overlap closely enough on chemistry and mechanical properties that JIS G4804 SUM43 is often considered as a substitute for SAE J403 1144 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
What is the difference between SAE J403 1144 and JIS G4804 SUM43?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can SAE J403 1144 be substituted with JIS G4804 SUM43?
SAE J403 1144 and JIS G4804 SUM43 overlap closely enough on chemistry and mechanical properties that JIS G4804 SUM43 is often considered as a substitute for SAE J403 1144 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.