What is the density of INCONEL X750?
Alloy X-750, Inconel X-750, N07750 – Description
Alloy X-750, commonly known as Inconel X-750, is a nickel-chromium alloy. It was specifically developed to achieve high creep resistance – to resist deformation at high temperatures.
The titanium and aluminum contents make welding difficult, but with Al+Ti levels below 6%, welding does not pose a significant risk of strain-age cracking. Proper technique and heat treatment are required. See the Welding section for more information.
The X-750 alloy is enriched with elements such as cobalt, molybdenum, boron, zirconium, tungsten and/or niobium, which enable the superalloy to be used as gas turbine components.
Applications
Typical applications are gas turbine components (aerospace and industrial turbines), high temperature fasteners, springs and rocket engines. After a slightly different heat treatment, Alloy X-750 can also be used in nuclear reactor components, typically pressurized water reactors (PWR) and boiling water reactors (BWR). It can also be used in cryogenic applications.
Alloy X-750, Inconel X-750, N07750 - Physical and Mechanical Properties
Room Temperature Physical Properties:
Density: 8.28 g/cm3
First Melting Temperature: 1290 °C
Precipitation Temperature: 955 °C
Room Temperature Mechanical Properties of Inconel X-750 Bar:
Tensile Strength: 1200 MPa
Yield Strength: 815 MPa
Elongation: 27%
High Temperature (540°C) Mechanical Properties of Inconel X-750 Bar:
Tensile Strength: 1050 MPa
Yield Strength: 725 MPa
Elongation: 26%
Fracturing Strength and Temperature of Inconel X750 Bar:
650°C: 470 MPa
870°C: 50 MPa
Corrosion Behavior
As a super alloy, X-750 exhibits high corrosion resistance in moderate environments. The results of corrosion tests for some challenging environments are discussed below.
Molten Carbonates - Corrosion data produced in molten carbonate at 900°C for 504 hours show that Inconel X-750 has adequate corrosion resistance to molten carbonates. In the test, the total depth of corrosion was 0.27 mm.
High Temperature Water - Inconel X-750 is susceptible to stress corrosion cracking in degassed high purity water at 300-350°C and intergranular SCC in aerated high temperature water. Suboptimal heat treatment further weakens the corrosion resistance of this alloy in high temperature water (see the "Heat Treatment" section for more information).
Halides - X-750 is not resistant to hydrogen fluoride HF and hexafluorosilicic acid H2SiF6 at temperatures above 50°C. Contact with these substances is a cause of SCC.
X-750 is not resistant to hydrogen fluoride (HF), which can cause stress corrosion cracking.
