Strong Match — 93.9% match
based on chemical composition and mechanical property overlap.
AISI 8620 and SAE J404 8720 (SAE J404:2009) are both steel grades.
Both fall under the Alloy Steel category.
AISI 8620 is typically used for used for gears, shafts, sprockets, pinions, bushings, and transmission components., while SAE J404 8720 is commonly used for chemistry-only alloy steel grade; see the composition notes for product scope.
AISI 8620 is defined under AISI, originating from United States, while SAE J404 8720 is defined under SAE International, originating from United States.
As per chemical composition, AISI 8620 vs SAE J404 8720 is a 93.9% 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 93.9%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
AISI 8620
SAE J404 8720
Tensile Strength
750-980 MPa
Not specified
Yield Strength
550-780 MPa
Not specified
Elongation
12-18%
Not specified
Hardness
200-280 HB
Not specified
Typical Applications
AISI 8620
Used for gears, shafts, sprockets, pinions, bushings, and transmission components.
SAE J404 8720
Chemistry-only alloy steel grade; see the composition notes for product scope
Can AISI 8620 Be Substituted With SAE J404 8720?
AISI 8620 and SAE J404 8720 overlap closely enough on chemistry and mechanical properties that SAE J404 8720 is often considered as a substitute for AISI 8620 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 AISI 8620 and SAE J404 8720?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can AISI 8620 be substituted with SAE J404 8720?
AISI 8620 and SAE J404 8720 overlap closely enough on chemistry and mechanical properties that SAE J404 8720 is often considered as a substitute for AISI 8620 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.