Strong Match — 99.6% match
based on chemical composition and mechanical property overlap.
SAE J404 5140 (SAE J404:2000) and AISI 5140 are both steel grades.
Both fall under the Alloy Steel category.
SAE J404 5140 is typically used for chemistry-only alloy steel grade; see the composition notes for product scope, while AISI 5140 is commonly used for used for gears, shafts, spindles, bolts, machinery parts, and automotive components..
SAE J404 5140 is defined under SAE International, originating from United States, while AISI 5140 is defined under AISI, originating from United States.
As per chemical composition, SAE J404 5140 vs AISI 5140 is a 99.6% 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 99.6%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
SAE J404 5140
AISI 5140
Condition
Not specified
Quenched & Tempered
Tensile Strength
Not specified
850-1000 MPa
Yield Strength
Not specified
650-800 MPa
Elongation
Not specified
12-18%
Hardness
Not specified
240-300 HB
Typical Applications
SAE J404 5140
Chemistry-only alloy steel grade; see the composition notes for product scope
AISI 5140
Used for gears, shafts, spindles, bolts, machinery parts, and automotive components.
Can SAE J404 5140 Be Substituted With AISI 5140?
SAE J404 5140 and AISI 5140 overlap closely enough on chemistry and mechanical properties that AISI 5140 is often considered as a substitute for SAE J404 5140 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 J404 5140 and AISI 5140?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can SAE J404 5140 be substituted with AISI 5140?
SAE J404 5140 and AISI 5140 overlap closely enough on chemistry and mechanical properties that AISI 5140 is often considered as a substitute for SAE J404 5140 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.