Strong Match — 98% match
based on chemical composition and mechanical property overlap.
JIS G4804 SUM43 (JIS G 4804:2021) and SAE J403 1144 (SAE J403:2009) are both steel grades.
Both fall under the Free Machining Steel category.
JIS G4804 SUM43 is typically used for high speed automatic machining, automotive parts, while SAE J403 1144 is commonly used for chemistry-only grade; product scope as listed in the composition notes.
JIS G4804 SUM43 is defined under Japanese Industrial Standards (JIS), originating from Japan, while SAE J403 1144 is defined under SAE International, originating from United States.
As per chemical composition, JIS G4804 SUM43 vs SAE J403 1144 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
JIS G4804 SUM43
SAE J403 1144
Tensile Strength
540–690 MPa
Not specified
Elongation
≥9%
Not specified
Hardness
163–207 HB
Not specified
Typical Applications
JIS G4804 SUM43
High speed automatic machining, automotive parts
SAE J403 1144
Chemistry-only grade; product scope as listed in the composition notes
Can JIS G4804 SUM43 Be Substituted With SAE J403 1144?
JIS G4804 SUM43 and SAE J403 1144 overlap closely enough on chemistry and mechanical properties that SAE J403 1144 is often considered as a substitute for JIS G4804 SUM43 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 JIS G4804 SUM43 and SAE J403 1144?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can JIS G4804 SUM43 be substituted with SAE J403 1144?
JIS G4804 SUM43 and SAE J403 1144 overlap closely enough on chemistry and mechanical properties that SAE J403 1144 is often considered as a substitute for JIS G4804 SUM43 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.