Invar 36 alloy powder

Invar 36 (64FeNi) (4J36) (Fe-Ni36) (1.3912) is one kind of nickel iron alloy which has a low-expansion coefficient with 36% Nickel, 64% Iron. It can maintain nearly constant dimensions over the range of normal atmospheric temperatures, and has a low coefficient of expansion from cryogenic temperatures to about 260°C.

Invar 36 alloy also retains good strength and toughness at cryogenic temperatures. It has been used for applications where dimensional changes due to temperature variation must be minimized such as in aircraft controls, optical and laser system, and radio and electronic devices etc.

Invar 36 alloy also can be used in the areas of anisotropy. Truer RD team ever printed some samples of Invar 36 alloy through a laser powder bed fusion (LPBF) process to do some investigation for its microstructure & mechanical properties. The results showed its microstructure and mechanical properties of the three orientations have anisotropy characteristic.

Invar 36 alloy powder of Truer can be manufactured by Gas Atomization (GA) or PREP with a spherical morphology which provides good flow characteristics and high packing density. In addition, the powder has a low oxygen content and low impurity levels, resulting in a metallurgically clean product with enhanced mechanical performance.

Its typical chemical composition showed in below table:

Particle Size Distribution (PSD) of Invar 36 alloy powder is available in a wide range which can be customized from 0-200um, including common range 15-45um, 15-53um, 20-65um, 53-106um and 53-150um. Other particle size distribution also can be provided per customer specification.

All Truer metal powders are supplied with a certificate of analysis containing information on the chemical composition and particle size distribution. Information on other powder characteristics is available upon request.

아래는 COA(데이터시트) of Invar 36 powder with PSD 0-20um produced by vacuum gas atomizing process.