Background
Often referred to as Inconel Alloy® X-750, this high-performance austenitic nickel-chromium alloy is made precipitation-hardenable by the addition of aluminum and titanium. It has good resistance to corrosion and oxidation along with high tensile and creep-rupture properties at high temperatures. For extended applications that require high strength at high temperatures, Alloy X-750 may require a solution treatment, with air cooling between intermediate and final aging.
Alloy X-750 displays excellent workability, including machinability and welding. Alloy X-750 has excellent relaxation resistance, good elevated temperature strength properties to 1300ºF (700°C), and oxidation resistance to 1800ºF (983˚C). Lastly, Alloy X-750 is resistant to a wide variety of industrial corrosives under both oxidizing and reducing conditions, while also displaying excellent resistance to chloride stress corrosion cracking in fully age-hardened conditions.
Chemical Composition
Al: 0.40-1.0%, Cb: 0.70-1.20%, Cr: 14.0-17.0%, Fe: 5.0-9.0%, Ni: 70% min and Ti: 2.25-2.75%
Qualifying Specifications and Standards
| Standard | Designation |
| AMS | 5667, 5671, 5698 (No 1 Spring Temper), 5699 (Spring Temper) |
| ASTM | B637 |
| ISO | 15156-3 (NACE MR 0175) |
| EN / W.NR | 2.4669 |
| UNS | N07750 |
| AWS | 014 |
Heat Treatability Standards
| Form | Standards |
| Rod |
ASTM B 637, ASME SB 637, ISO 9723, ISO9724, ISO9725, AMS 5667, AMS 5668, AMS 5669, AMS 5670, AMS 5671, AMS 5747, EN10269 |
|
Bar |
ASTM B 637, ASME SB 637, ISO 9723, ISO9724, ISO9725, AMS 5667, AMS 5668, AMS 5669, AMS 5670, AMS 5671, AMS 5747, EN10269 |
| Wire | BS HR 505, AMS 5698, AMS 5699 |
Applications
With Alloy X-750's excellent relaxation resistance it is useful for applications such as high-temperature springs and bolts. Alloy X-750 is commonly used in:
Alloy X-750 is a stocked product at Central Wire Industries. Lead times vary based on processing required to finished form, but raw material is available at many Central Wire locations. Central Wire makes Alloy X-750 available in the following forms:
Please contact us for additional details, product availability, and any other questions you may have. Send an inquiry to sales@centralwire.com, or complete our inquiry form and we will respond as soon as possible.