Alpha Sigma Mu (ΑΣΜ) is an international scholastic honor society recognizing academic achievement among students in the fields of metallurgy and materials engineering. It was established in 1932 at Michigan Technological University.

Alpha Sigma Mu was founded by the Metallurgy Department of the Michigan College of Mining and Technology (now Michigan Technological University) in January 1932. It was established as a scholastic honor society to recognize academic achievement of students of metallurgy, metallurgical engineering, and materials engineering.

After expanding to three campuses, it maintained these three chapters without further growth. In 1957, the society was reorganized with the assistance of the American Society for Metals. Alpha Sigma Mu was admitted to the Association of College Honor Societies in 1965.

It separated from the American Society for Metals in the 1990s. In the 21st century, it expanded internationally, with chapters installed in Australia, India, Russia, and Spain.

In 2012, the society had 34 active chapters, 150 active members, and a total membership of over 8,000. Its headquarters are housed at Michigan Technological University in Houghton, Michigan.

The Alpha Sigma Mu badge is a rectangular gold or silver key engraved with a C-curve and the Greek letters ΑΣΜ. The society's colors are silver and gold. Its symbol is the C-curve. Its publication is ASM Blog.

Alpha Sigma Mu has three classes of membership: regular (student), honorary, and distinguished life members. Potential student members are nominated by the chapters' faculty advisors. Initiates are juniors and seniors ranked in the top 25 percent of the department, with and a GPA in the top fifty percent. Graduate students are also eligible for membership.

Following is list of Alpha Sigma Mu chapters.