Nimonic 81

In -253 ~ 650 ℃ use of equiaxial crystal casting, Nimonic 81 such alloys in a wide range of temperatures have a good overall performance, especially at low temperatures can maintain strength and plasticity are not decreased. Such as in aviation, aerospace engines on the larger amount of K4169 alloy, its 650 ℃ tensile strength of 1000MPa, yield strength of 850MPa, tensile plasticity of 15%; 650 ℃, 620MPa stress under the lasting life of 200 hours. Has been used to make the aero-engine diffuser magazine and aerospace engines in a variety of pumps with complex structural parts.

Nimonic 81 chemical composition performance role 1. Nickel; can improve the strength and toughness of steel, improve hardenability. When the content is high, it can significantly change some physical properties of steel and alloy, and improve the corrosion resistance of steel. 2. Chromium; can improve the hardenability and wear resistance of steel, can improve the corrosion resistance and oxidation resistance of steel. 3. Molybdenum; can significantly improve the hardenability and thermal strength of steel, to prevent tempering brittleness, improve the remanent magnetism and coercive force 4. Tungsten; can improve the red hardness and thermal strength of steel, and can improve the wear resistance of steel.