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SAE J404 8655 vs SAE J404 8640

Close Alternative — 84.9% match based on chemical composition and mechanical property overlap.

SAE J404 8655 (SAE J404:2000) and SAE J404 8640 (SAE J404:2000) are both steel grades. Both fall under the Alloy Steel category. SAE J404 8655 is typically used for chemistry-only alloy steel grade; see the composition notes for product scope, while SAE J404 8640 is commonly used for chemistry-only alloy steel grade; see the composition notes for product scope. SAE J404 8655 is defined under SAE International, originating from United States, while SAE J404 8640 is defined under SAE International, originating from United States.

As per chemical composition, SAE J404 8655 vs SAE J404 8640 is a 91.4% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 84.9%.

Frequently Compared With SAE J404 8655:
IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Mo6H NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 105Cr5 IS 11169 (Part 1) 10Ni5Cr4 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6
Match Breakdown
CHEMISTRY MATCH
91.4%
MECHANICAL MATCH
No shared data
OVERALL
84.9%
Specifications
Property SAE J404 8655 SAE J404 8640
Standard SAE J404:2000 SAE J404:2000
Category Alloy Steel Alloy Steel
C (%) 0.51-0.59 0.38-0.43
Cr (%) 0.40-0.60 0.40-0.60
Mn (%) 0.75-1.00 0.75-1.00
Mo (%) 0.15-0.25 0.15-0.25
Ni (%) 0.40-0.70 0.40-0.70
P (%) <=0.030 <=0.030
S (%) <=0.040 <=0.040
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.
Typical Applications
SAE J404 8655
Chemistry-only alloy steel grade; see the composition notes for product scope
SAE J404 8640
Chemistry-only alloy steel grade; see the composition notes for product scope
Can SAE J404 8655 Be Substituted With SAE J404 8640?
SAE J404 8655 and SAE J404 8640 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
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SAE J404 8655
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SAE J404 8640
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Frequently Asked Questions
What is the difference between SAE J404 8655 and SAE J404 8640?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can SAE J404 8655 be substituted with SAE J404 8640?
SAE J404 8655 and SAE J404 8640 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.