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Inconel® Alloy X-750

Common Trade Names: Inconel X750, Haynes X750, Alloy X750, Nickel X750,  Pyromet X750, NickelvacX750, Nicorros® 7016

INCONEL® alloy X-750 (UNS N07750/W. Nr. 2.4669) is a precipitation-hardenable nickel-chromium alloy used for its corrosion and oxidation resistance and high strength at temperatures to 1300°F. Although much of the effect of precipitation hardening is lost with increasing temperature over 1300°F, heat-treated material has useful strength up to 1800°F. Alloy X-750 also has excellent properties down to cryogenic termperatures. 

Depending on the application and the properties desired, various heat treatments are employed. For service above 1100°F, particularly where loads are to be sustained for long times, optimum properties are achieved by solution treating (2100°F) plus stabilization treating (1550°F) plus precipitation treating (1300°F). For service below 1100°F, the alloy may be strengthened by precipitation treating after hot or cold working or by precipitation treating after equalizing or solution treating. A furnace-cooling treatment is also used to develop optimum properties for some applications.

The various heat treatments and the properties developed are described under the section on Mechanical Properties.
Property values in this bulletin – the results of extensive testing – are typical of the alloy but, unless shown as limiting, should not be used as specification values.

Available Product Forms: 
Sheet, strip, plate, round bar, flat bar, forging stock, hexagon, wire, tube and extruded

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Specifications

INCONEL® alloy X-750 is designated as UNS N07750 and W. Nr. 2.4669. The alloy is stated in NACE MR-01-75. 

Rod, Bar and Forging Stock: - ASTM B 637; ASME SB 637; ISO 9723-9725; AMS 5667; AMS 5671; AMS 5747; EN 10269.

Plate, Sheet and Strip: AMS 5542 and 5598.

Wire: BS HR 505, AMS 5698; AMS 5699.

Trademark Notice: Some names are trade names and/or trademarks of specific manufacturers. American Special Metals, Corp. is not affiliated with any manufacturer(s). Orders will be filled to meet specifications from any available source(s). Names are listed solely for reference to help identify products consistent with listed specifications.

Inconel®  X-750 is a Registered Trademarks of Special Metals Corporation and Its subsidiaries.

Chemical Composition

Nickel (plus Cobalt)....................................................70.00 min.
Chromium...................................................................14.0-17.0
Iron..................................................................................5.0-9.0
Titanium.......................................................................2.25-2.75
Aluminum....................................................................0.40-1.00 
Niobium (plus Tantalum)..............................................0.70-1.20
Manganese.................................................................1.00 max.
Silicon.........................................................................0.50 max.
Sulfur...........................................................................0.01 max.
Copper........................................................................0.50 max.
Carbon........................................................................0.08 max.
Cobalt1.........................................................................1.00 max.
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