What was Metallica's highest chart position on the U.S. Billboard 200?

Metallica reached number one on the U.S. Billboard 200.

The album debuted at the top of the chart in September 1991, making it Metallica's first U.S. number-one album. Its success was driven by sustained sales, extensive touring, and a series of widely played singles rather than a brief release-week spike.

The record remained on the Billboard 200 for hundreds of weeks across its chart history, an unusually long run for a heavy-metal album. Its performance helped move Metallica from the specialist metal market into the mainstream international rock audience.

The album's chart achievement is sometimes confused with the band's earlier ...And Justice for All, which reached a lower peak in the United States. The Black Album's number-one debut marked a clear commercial turning point for Metallica.