Inconel Alloy X-750 Introduction to Characteristics and Execution Standards

Inconel Alloy X-750 Introduction to Characteristics and Execution Standards

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.

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

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.

Inconel Alloy X-750Chemical Composition

Limiting Chemical Composition, %  by Weight 

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.