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Inconel® X750 Coil
Available Configurations
Properties common to all products in this list
| Thickness | Coil Width | Length | Temper ⓘ |
|---|---|---|---|
| 0.028 mm to 0.25 mm | 229 mm to 305 mm | 0.5 m to 2 m | As rolled Annealed |
Need custom configurations? Please contact us.
Health hazard/Hazardous to the ozone layer
Serious health hazard
Key Features
Inconel® X750 Coil (Ni 74/Cr 15/Fe 7/Ti/Al/Nb, UNS N07750) is a precipitation-hardened nickel-chromium superalloy in continuous strip format, available in As Rolled and Annealed tempers:
Exceptional Stress Relaxation Resistance Under Sustained Elevated Temperature Load
X750 is the established choice for spring strip where conventional spring steels lose their mechanical properties or undergo unacceptable stress relaxation at operating temperature. Its γ′-strengthened microstructure maintains spring force and geometric stability under sustained elevated temperature loading.
Tensile Strength 700–1,250 MPa, Elastic Modulus 210 GPa
The tensile strength range spans from the As Rolled starting condition through to the peak age-hardened state. The 210 GPa modulus supports spring rate and stiffness calculations for precision spring and sealing strip applications.
As Rolled Temper: Strength and Spring-Back for Directly Formed Strip
The As Rolled condition provides strength and spring-back for directly formed spring and sealing strip where age hardening after forming is not required.
Annealed Temper: Maximum Ductility Before Age Hardening
The Annealed condition maximizes ductility for forming before age hardening to full γ′-strengthened properties, ensuring consistent forming behavior and reliable response to the subsequent heat treatment.
Essentially Non-Magnetic Character
Essentially non-magnetic character across the full cryogenic to elevated temperature service range qualifies X750 coil for spring and sealing strip in electromagnetically sensitive aerospace, nuclear, and instrumentation assemblies.
Industrial Applications
Inconel® X750 Coil is used across aerospace, nuclear, and precision instrument industries wherever continuous spring strip stock must maintain mechanical properties and spring force under sustained elevated temperature load:
- ✦ Retaining Ring and Spring Strip in Aerospace and Nuclear Fastening Systems
- Used for retaining ring and spring strip in aerospace and nuclear fastening systems, where X750’s exceptional stress relaxation resistance and the coil format’s suitability for continuous forming operations together qualify it for demanding fastening applications.
- ✦ Continuous Forming of Turbine Sealing Strip Elements
- Applied for continuous forming of turbine sealing strip elements, where retained spring force and geometric stability under sustained elevated temperature load are the primary selection criteria over conventional spring steels.
- ✦ Flexible Structural Strip for Cryogenic and Elevated Temperature Instrument Assemblies
- Used as flexible structural strip for cryogenic and elevated temperature instrument assemblies, where non-magnetic character and consistent mechanical properties across the full cryogenic to high-temperature range are required simultaneously.
- ✦ Precipitation Hardening, Stress Relaxation and Creep Research in Strip Geometry
- Provides consistent material for precipitation hardening response studies in strip geometry, stress relaxation and creep characterization under sustained elevated temperature loading, and spring performance evaluation across the alloy’s full service range.
Material Properties
| Element | Value |
|---|---|
| Hardness - Brinell | 150-280 |
| Elongation at break( % ) | 20 |
| Modulus of elasticity( GPa ) | 210 |
| Shear strength( MPa ) | 118-152 |
| Tensile strength( MPa ) | 700-1250 |
| Element | Value |
|---|---|
| Initial permeability | 1.002 |
| Curie temperature( C ) | -193 |
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 122-124 |
| Element | Value |
|---|---|
| Melting point( C ) | 1390-1425 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 431@23°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 12@23°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 12.6@20-100°C |
| Element | Value |
|---|---|
| Density( gcm⁻³ ) | 8.25 |
Tolerances
| Thickness | <0.01mm | ±25% |
|---|---|---|
| Thickness | 0.01mm - 0.05mm | ±15% |
| Thickness | >0.05mm | ±10% |
| Coil Width | <100mm | ±1mm |
| Coil Width | >=100mm | +2% / -1% |
| Length | +10% / -0% |