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SAE J404 5120 vs AISI 5120

Strong Match — 98.3% match based on chemical composition and mechanical property overlap.

SAE J404 5120 (SAE J404:2000) and AISI 5120 are both steel grades. Both fall under the Alloy Steel category. SAE J404 5120 is typically used for chemistry-only alloy steel grade; see the composition notes for product scope, while AISI 5120 is commonly used for case hardened gears, pins, shafts, cams. SAE J404 5120 is defined under SAE International, originating from United States, while AISI 5120 is defined under AISI, originating from United States.

As per chemical composition, SAE J404 5120 vs AISI 5120 is a 98.3% 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 98.3%.

Frequently Compared With SAE J404 5120:
IS 1570 (Part 4) 105Cr5 IS 4367 10Cr9Mo10 UNI 11234 100Cr6 IS 1570 (Part 7) 10Mo6H IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 10Mo6 IS 4367 07Cr4Mo6 NF A35-565 100C6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
98.3%
MECHANICAL MATCH
No shared data
OVERALL
98.3%
Specifications
Property SAE J404 5120 AISI 5120
Standard SAE J404:2000 AISI
Category Alloy Steel Alloy Steel
C (%) 0.17-0.22 0.17–0.22
Cr (%) 0.70-0.90 0.70–0.90
Mn (%) 0.70-0.90 0.70–0.90
P (%) <=0.030 Not specified
S (%) <=0.040 Not specified
Si (%) 0.15-0.35 0.15–0.35
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 5120 AISI 5120
Condition Not specified Carburized & Case Hardened
Tensile Strength Not specified 750–950 MPa
Case Hardness HRC Not specified 58–62
Core Hardness HB Not specified 207–269
Typical Applications
SAE J404 5120
Chemistry-only alloy steel grade; see the composition notes for product scope
AISI 5120
Case hardened gears, pins, shafts, cams
Key Differences
Can SAE J404 5120 Be Substituted With AISI 5120?
SAE J404 5120 and AISI 5120 overlap closely enough on chemistry and mechanical properties that AISI 5120 is often considered as a substitute for SAE J404 5120 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
SAE J404 5120
No active listings currently.
AISI 5120
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5100–6500 mm (200.79–255.91 in)
On M-EX Right Now
SAE J404 5120
0 active listings and RFQs →
AISI 5120
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between SAE J404 5120 and AISI 5120?
SAE J404 5120 specifies P, S which are not specified for AISI 5120.
Can SAE J404 5120 be substituted with AISI 5120?
SAE J404 5120 and AISI 5120 overlap closely enough on chemistry and mechanical properties that AISI 5120 is often considered as a substitute for SAE J404 5120 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.