Inconel X750 Heat Treatment Methods And Product Availability

Inconel X750 is a precipitation-hardenable nickel-chromium superalloy known for its excellent high-temperature strength, corrosion resistance, and creep resistance. To achieve optimal mechanical properties, different heat treatment methods are applied depending on the product form (rods, bars, forgings, sheets, plates, etc.) and intended application. This article explores the standard heat treatment processes for Inconel X750 and its availability in various forms.

Heat Treatment Methods for Inconel X750

 

1. Heat Treatments for Rods, Bars, and Forgings

 AMS 5667 – Equalizing + Precipitation Treatment

• Process: 1625°F (885°C) for 24 hours, air cool (AC) + 1300°F (704°C) for 20 hours, AC
• Properties: High strength and notch rupture ductility up to 1100°F (593°C)
• Applications: Fasteners, turbine blades, and high-stress components

AMS 5668 – Triple Heat Treatment (Maximum Creep & Rupture Strength)

• Process: 2100°F (1149°C) anneal + 1550°F (843°C) for 24 hours, AC + 1300°F (704°C) for 20 hours, AC
• Properties: Superior creep, relaxation, and rupture strength above 1100°F (593°C)
• Applications: Jet engine components, nuclear reactors

AMS 5670 – Solution Treatment + Furnace-Cool Precipitation

• Process: 1800°F (982°C) anneal + 1350°F (732°C) for 8 hours, furnace cool (FC) to 1150°F (621°C), hold for 18 hours total, AC
• Properties: Increased tensile strength, reduced heat treatment time, service up to 1100°F (593°C)
• Applications: Structural aerospace parts, high-temperature fasteners

Short Furnace-Cool Aging (Alternative to AMS 5670/5671)

• Process: 1800°F (982°C) anneal + 1400°F (760°C) for 1 hour, FC to 1150°F (621°C), hold for 6 hours total, AC
• Properties: Slightly lower than AMS 5670 but with reduced processing time
• Applications: Cost-effective solution for moderate-temperature applications

 

2. Heat Treatments for Sheet, Strip, and Plate

AMS 5542 – Constant-Temperature Precipitation Treatment

• Process: 1300°F (704°C) for 20 hours, AC
• Properties: High strength up to 1300°F (704°C)
• Applications: Exhaust systems, combustion chambers

AMS 5598 – Furnace-Cool Precipitation Treatment

• Process: 1350°F (732°C) for 8 hours, FC to 1150°F (621°C), hold for 18 hours total, AC
• Properties: Enhanced tensile properties up to 1100°F (593°C)
• Applications: Pressure vessels, heat exchangers

Short Furnace-Cool Precipitation (Alternative to AMS 5598)

• Process: 1400°F (760°C) for 1 hour, FC to 1150°F (621°C), hold for 6 hours total, AC
• Properties: Balanced strength and processing efficiency
• Applications: Industrial heating elements, chemical processing

 

Product Availability & Dimensions

 

Rods & Bars (X-750)

Diameter Range:

½" to 6" (in ¼" increments)

6" to 10" (in ½" increments)

Standards: AMS 5667, AMS 5668, AMS 5670

 

UNS N07752 (Special Forging Grade)

Composition: Lower carbon & cobalt (max 0.05% each)

Forms: Billet for forging

 

Other Available Forms

Round Bar, Flat Bar, Sheet, Strip, Plate

Forging Stock, Hexagon, Wire, Tube, Welding Wire, Extruded Sections

Ex-Stock Availability: Equalized round bars, sheet & plate

 

Inconel X750's performance is highly dependent on its heat treatment process. Whether you need high-strength forgings (AMS 5668), optimized sheet metal (AMS 5542), or fast-delivery ex-stock materials, selecting the right heat treatment ensures reliability in aerospace, energy, and industrial applications.

 

Need Inconel X750 in custom sizes or heat treatments? Contact us today for technical specifications, pricing, and availability!

 

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