Strong Match — 91.5% match
based on chemical composition and mechanical property overlap.
GB/T 3077 30CrMo (GB/T 3077:2015) and SAE J404 4130 (SAE J404:2009) are both steel grades.
Both fall under the Alloy Steel category.
GB/T 3077 30CrMo is typically used for hot-rolled or forged structural alloy steel bars, while SAE J404 4130 is commonly used for aircraft structures, pressure vessels, high tensile tubes.
GB/T 3077 30CrMo is defined under Guobiao Standards (GB/T), originating from China, while SAE J404 4130 is defined under SAE International, originating from United States.
As per chemical composition, GB/T 3077 30CrMo vs SAE J404 4130 is a 91.5% 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 91.5%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
GB/T 3077 30CrMo
SAE J404 4130
Tensile Strength
>=930 MPa
Not specified
Yield Strength
>=735 MPa
Not specified
Elongation
>=12%
Not specified
Hardness
<=229 HB
Not specified
Condition
Quenched and tempered, test sample 15 mm; hardness is for bars delivered annealed or high temperature tempered
Not specified
Typical Applications
GB/T 3077 30CrMo
Hot-rolled or forged structural alloy steel bars
SAE J404 4130
Aircraft structures, pressure vessels, high tensile tubes
Key Differences
GB/T 3077 30CrMo specifies Cu which is not specified for SAE J404 4130.
Can GB/T 3077 30CrMo Be Substituted With SAE J404 4130?
GB/T 3077 30CrMo and SAE J404 4130 overlap closely enough on chemistry and mechanical properties that SAE J404 4130 is often considered as a substitute for GB/T 3077 30CrMo 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 GB/T 3077 30CrMo and SAE J404 4130?
GB/T 3077 30CrMo specifies Cu which is not specified for SAE J404 4130.
Can GB/T 3077 30CrMo be substituted with SAE J404 4130?
GB/T 3077 30CrMo and SAE J404 4130 overlap closely enough on chemistry and mechanical properties that SAE J404 4130 is often considered as a substitute for GB/T 3077 30CrMo in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.