Inconel 718 and AMS 5596 are related to the same material, but they represent different aspects of its specification. Inconel 718 is a specific nickel-based superalloy, while AMS 5596 is an aerospace material specification that outlines the requirements for alloy 718 in sheet, strip, and plate forms. It is available as a foil, plate, sheet, and strip. AMS 5596 Inconel 718 is best suited for fluid lines and components that require resistance and stress-rupture of up to 1300°F (705°C), and oxidation resistance of up to 1800°F (982°C).
AMS stands for "Aerospace Material Specification." AMS 5596 is a standard that provides detailed requirements for Inconel 718 in the form of sheets, strips, and plates. AMS 5596 sheet is used in the aerospace industry to ensure that Inconel 718 materials in sheet, strip, and plate forms meet the necessary quality and performance standards for aerospace applications.
What is AMS 5596?
AMS 5596 (issued by SAE International) specifies the standards for corrosion and heat-resistant nickel alloy sheet, strip, and plate. It guarantees that the material maintains high tensile, yield, and creep-rupture strengths at temperatures up to 1300°F (705°C) and oxidation resistance up to 1800°F (982°C).
Alloy Designation: Inconel 718 / Alloy 718
UNS Number: UNS N07718
Form Factors Covered: Sheet, Strip, Foil, and Plate
Delivery Condition: Solution Annealed (ready for forming and subsequent age hardening)
Chemical Composition Limits by Weight Percentage:
| Element | Weight Percentage (%) |
| Nickel + Cobalt (Ni + Co) | 50.00 – 55.00 |
| Chromium (Cr) | 17.00 – 21.00 |
| Niobium + Tantalum (Nb + Ta) | 4.75 – 5.50 |
| Molybdenum (Mo) | 2.80 – 3.30 |
| Titanium (Ti) | 0.65 – 1.15 |
| Aluminum (Al) | 0.20 – 0.80 |
| Cobalt (Co) | 1.00 Max |
| Carbon (C) | 0.08 Max |
| Iron (Fe) | Balance |
Heat Treatment & Mechanical Property Requirements
Under AMS 5596, flat-rolled Inconel 718 is supplied in the solution-annealed condition (typically heated to 1750°F–1800°F / 954°C–982°C followed by rapid cooling). In this state, the alloy remains ductile for stamping, laser cutting, and bending before end-users perform age hardening (precipitation hardening) to reach peak strength.
Room-Temperature Properties (Solution Annealed Condition)
| Mechanical Property | AMS 5596 Specification Limit | Typical Value |
| Tensile Strength (UTS) | ≤ 140 ksi (965 MPa) | ~120–135 ksi |
| 0.2% Yield Strength | ≤ 80 ksi (552 MPa) | ~60–75 ksi |
| Elongation (in 2 inches) | ≥ 30% | 35% – 45% |
| Hardness | ≤ 100 HRB (or equivalent) | ~90–95 HRB |
Key Mechanical Property Demands for AMS 5596
To pass inspection under the AMS 5596 standard, the flat-rolled material must undergo rigorous solution annealing treatment. In this state, the material exhibits optimized ductility, making it ready for forming and subsequent age-hardening by the end user to achieve full strength.
Typical Room-Temperature Mechanical Properties in the Solution Annealed State:
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Tensile Strength: Less than or equal to 140 ksi (965 MPa)
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Yield Strength at 0.2 percent Offset: Less than or equal to 80 ksi (552 MPa)
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Elongation in 2 inches: Greater than or equal to 30 percent
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Hardness: Less than or equal to 100 HRB (or equivalent)
Industrial Applications for AMS 5596 Flat Stock
Because AMS 5596 covers sheet and plate forms, it is a critical material choice for components requiring precise stamping, laser cutting, or seamless welding in extreme environments:
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Aerospace Engineering: Aircraft gas turbine engine parts, exhaust ducts, and combustion liners.
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Space Exploration: Liquid-fuel rocket motor components and cryogenic storage containment hulls.
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Power Plants: High-temperature fasteners and expansion joints for gas turbines.
Source AMS 5596 Inconel 718 Sheet & Plate from Huitong Pipeline
Zhengzhou Huitong Pipeline Equipment Co., Ltd. is an international stockist and supplier of high-performance nickel alloys. We supply AMS 5596 / UNS N07718 Inconel 718 sheet, plate, and strip tailored to your engineering specifications.
Why Choose Huitong?
Full Certification: Every shipment includes EN 10204 3.1 Mill Test Certificates with complete heat traceability.
Custom Processing: Waterjet cutting, shearing, laser cutting, and custom sheet sizing available.
Global Shipping: Fast export packaging and door-to-door delivery worldwide.
Need a price quote or technical datasheet?
Contact our engineering sales team today at market@htpipe.com or send us your Bill of Materials (BOM) for an instant quotation.
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