AMS 5699 Alloy X750 (Inconel® X750 / UNS N07750) Wire

ZYTC Alloy supplies AMS 5699 Inconel X750 UNS N07750 spring temper wire, featuring high temperature resistance, anti-relaxation and corrosion resistance for aerospace, oil & gas and power generation industries.

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AMS 5699 specification governs corrosion and heat-resistant Inconel X750 wire products, including round, square and flat wire with a maximum dimension of 0.625 inch (15.88 mm). All our X750 wires are strictly produced and tested under spring temper, delivering consistent mechanical stability and reliable elastic performance for high-temperature spring components and precision fasteners.

Applicable Industry Specifications

ZYTC Alloy’s AMS 5699 X750 wire fully complies with global authoritative standards to meet diversified industrial certification requirements:

AMS 5698, AMS 5699, AMS 5778, AMS 5667, AMS 5668, AMS 5670, ASTM B637, NACE MR0175 / ISO 15156-3

Alloy Overview & Core Advantages

Inconel X750 (UNS N07750, W.Nr. 2.4669) is a classic precipitation-hardened nickel-chromium alloy strengthened by aluminum and titanium additions. It maintains outstanding mechanical strength at continuous operating temperatures up to 1300°F (704°C) and reliable oxidation resistance up to 1800°F (982°C). Its most prominent feature is excellent anti-relaxation performance, making it the ideal material for high-temperature springs that require stable elastic force under prolonged thermal cycling and load conditions.

In addition to superior high-temperature elasticity, X750 wire offers excellent general corrosion resistance, stress corrosion resistance and fatigue stability. It performs steadily across ultra-wide temperature ranges from cryogenic environments to high-temperature industrial working conditions, solving the common failure problems of ordinary spring materials such as elastic attenuation and thermal aging.

Chemical Composition (UNS N07750 / W.Nr. 2.4669)

Element	Min %	Max %
Nickel (Ni)	70.0	–
Chromium (Cr)	14.0	17.0
Iron (Fe)	5.0	9.0
Titanium (Ti)	2.25	2.75
Aluminum (Al)	0.40	1.00
Niobium/Columbium (Nb/Cb)	0.70	1.20
Manganese (Mn)	–	1.00
Silicon (Si)	–	0.50
Carbon (C)	–	0.08
Sulfur (S)	–	0.01
Copper (Cu)	–	0.50
Cobalt (Co)	–	1.00

Physical Properties

Property	Value
Density	0.299 lb/in³ (8.28 g/cm³)
Melting Point	2600°F (1430°C)
Modulus of Elasticity (E) – 70°F (20°C)	31.0 × 10⁶ psi (214 GPa)
Modulus of Elasticity (E) – 1000°F (538°C)	26.7 × 10⁶ psi (184 GPa)
Modulus of Rigidity (G) – 70°F (20°C)	12.0 × 10⁶ psi (82.7 GPa)
Coefficient of Expansion (70°F – 1000°F)	7.8 µin/in-°F (14.5 µm/m-°C)
Electrical Resistivity	20.1 µΩ.in (122 µΩ.cm)
Thermal Conductivity	83 Btu-in/ft²hr-°F (12.0 W/m-K)

Mechanical Properties – Spring Applications

Condition	Heat Treatment	Tensile Strength	Operating Temperature
Spring Temper (AMS 5699)	As supplied	160 – 220 ksi (1103 – 1517 MPa)	–
Spring Temper + Aged	Age: 1200°F (649°C) / 4 hrs	180 – 250 ksi (1241 – 1793 MPa)	Up to 700°F (371°C)
No.1 Temper	As supplied	130 – 165 ksi (896 – 1138 MPa)	–
No.1 Temper + Aged	Age: 1350°F (732°C) / 16 hrs	165 – 220 ksi (1138 – 1517 MPa)	Up to 1000°F (538°C)
Spring Temper + 3-Step Heat Treatment	Anneal: 2100°F (1149°C) / 2 hrs + Stabilize: 1550°F (843°C) / 24 hrs + Age: 1300°F (704°C) / 20 hrs	1100 – 1250 ksi (159 – 181 ksi)	-330°F to +1020°F (-200°C to +550°C)

Note: Spring Temper + Aged condition offers optimum stress resistance and low relaxation at temperatures up to 700°F (371°C).

Typical Applications

Springs – Operating from cryogenic temperatures up to 1300°F (704°C)
Fasteners – High-temperature bolts, screws, and threaded components
Nuclear Reactors – Core components and control rod mechanisms
Gas Turbines – High-temperature seals and spring elements
Rocket Engines – Critical spring and sealing components
Aircraft Structures – High-performance fastening and spring systems
Pressure Vessels – High-temperature sealing and spring applications

Industries Supplied

Oil & Gas Extraction and Processing – Downhole tools, valves, and subsea equipment
Nuclear – Reactor core components and control systems
Aerospace – Engine components, airframe structures, and fasteners
Power Generation – Gas turbine and steam turbine applications
Automotive – High-temperature turbocharger and exhaust system components

As a reliable Chinese nickel alloy manufacturer, ZYTC Alloy strictly controls the whole production process of AMS 5699 X750 wire, adopting precision smelting and standardized spring temper heat treatment. All products feature uniform microstructure, stable mechanical properties and ultra-low impurity content.

We provide complete mill test reports, full material traceability and customizable size specifications. Professional technical support is available for material selection, heat treatment guidance and customized solution design for global clients.

Get A Free Quote

Contact ZYTC Alloy today to obtain detailed datasheets, inspection reports and competitive quotations for AMS 5699 Inconel X750 alloy wire.

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