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SAE J404 4320 vs ISO 683-17 20NiCrMo7

Strong Match — 98.2% match based on chemical composition and mechanical property overlap.

SAE J404 4320 (SAE J404:2000) and ISO 683-17 20NiCrMo7 (ISO 683-17:1999) are both steel grades. Both fall under the Alloy Steel category. SAE J404 4320 is typically used for chemistry-only alloy steel grade; see the composition notes for product scope, while ISO 683-17 20NiCrMo7 is commonly used for used in large gears, turbine shafts, marine gearboxes, heavy-duty pinions, and industrial transmissions.. SAE J404 4320 is defined under SAE International, originating from United States, while ISO 683-17 20NiCrMo7 is defined under International Organization for Standardization (ISO), originating from International.

As per chemical composition, SAE J404 4320 vs ISO 683-17 20NiCrMo7 is a 98.2% 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 98.2%.

Frequently Compared With SAE J404 4320:
IS 1570 (Part 4) 105Cr5 IS 4367 10Cr9Mo10 IS 11169 (Part 1) 10Ni5Cr4 IS 1570 (Part 4) 103Cr4 UNI 11234 100Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Mo6H IS 4367 07Cr4Mo6 NF A35-565 100C6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
98.2%
MECHANICAL MATCH
No shared data
OVERALL
98.2%
Specifications
Property SAE J404 4320 ISO 683-17 20NiCrMo7
Standard SAE J404:2000 ISO 683-17:1999
Category Alloy Steel Alloy Steel
C (%) 0.17-0.22 0.17-0.22
Cr (%) 0.40-0.60 0.40-0.60
Mn (%) 0.45-0.65 0.45-0.65
Mo (%) 0.20-0.30 0.20-0.30
Ni (%) 1.65-2.00 1.65-2.00
P (%) <=0.030 <=0.035
S (%) <=0.040 <=0.040
Si (%) 0.15-0.35 0.15-0.30
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 4320 ISO 683-17 20NiCrMo7
Tensile Strength Not specified 1000-1300 MPa
Yield Strength Not specified 800 MPa min
Elongation Not specified 9-12%
Hardness Not specified 300-360 HB
Typical Applications
SAE J404 4320
Chemistry-only alloy steel grade; see the composition notes for product scope
ISO 683-17 20NiCrMo7
Used in large gears, turbine shafts, marine gearboxes, heavy-duty pinions, and industrial transmissions.
Can SAE J404 4320 Be Substituted With ISO 683-17 20NiCrMo7?
SAE J404 4320 and ISO 683-17 20NiCrMo7 overlap closely enough on chemistry and mechanical properties that ISO 683-17 20NiCrMo7 is often considered as a substitute for SAE J404 4320 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 4320
No active listings currently.
ISO 683-17 20NiCrMo7
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6600–7000 mm (259.84–275.59 in)
On M-EX Right Now
SAE J404 4320
0 active listings and RFQs →
ISO 683-17 20NiCrMo7
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between SAE J404 4320 and ISO 683-17 20NiCrMo7?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can SAE J404 4320 be substituted with ISO 683-17 20NiCrMo7?
SAE J404 4320 and ISO 683-17 20NiCrMo7 overlap closely enough on chemistry and mechanical properties that ISO 683-17 20NiCrMo7 is often considered as a substitute for SAE J404 4320 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.