Nickel Alloy GH4698

Nickel alloy GH4698 is a Ni-Cr based precipitation hardening deformed high-temperature alloy that excels in high-temperature environments ranging from 750°C to 800°C. As an upgraded version of the GH4033 alloy, GH4698 has been optimized by increasing the aluminum and titanium content, adding niobium and molybdenum, while reducing the chromium content. Over a wide temperature range of 550°C to 800°C, GH4698 exhibits excellent endurance and tensile strength while maintaining good plasticity and overall performance. In addition, after long-term use, its organizational structure remains stable with no harmful phase precipitation, ensuring the long-term reliability of the parts.

Nickel Alloy GH4698

Applications:

  • The alloy is widely used in manufacturing industries, such as in turbine discs and combustion chambers of aero-engines.

  • It is also used in the manufacturing of machine parts working at high temperatures, such as airplane engine compressor disks, guide vanes, and gas turbine disks.

Normal product forms: sheets, plates, bars, forgings, tubes, strips, and wires.

Specifications/Standard: GB/T 14992, HB/Z 140, and GJB/3782.

Chemical Composition:

  • Nickel (Ni): Balance

  • Chromium (Cr): 13.00-16.00%

  • Molybdenum (Mo): 2.80-3.20%

  • Aluminum (Al): 1.30-1.70%

  • Niobium (Nb): 1.80-2.20%

  • Titanium (Ti): 2.35-2.75%

  • Iron (Fe): 2.00% max

  • Carbon (C): 0.08% max

  • Silicon (Si): 0.60% max

  • Manganese (Mn): 0.40% max

  • Phosphorus (P): 0.015% max

  • Sulfur (S): 0.007% max

  • Boron (B): 0.005% max

Physical Constants and Thermal Properties

  • Density: 8.32 g/cm³

  • Melting point: 1340~1365℃