In 1994, Hermética, a heavy metal band from Argentina, broke up. Bassist Ricardo Iorio formed - one year later - Almafuerte with guitarist Claudio "El Tano" Marcielo and drummer Claudio Cardacci.

In 1995 they released their first studio album, Mundo Guanaco, which included songs of both Hermética and V8 (another of Ricardo Iorio's previous bands), and some new ones written by Iorio (most of them dealing with social issues). After the release of their second album, Del Entorno, Cardacci was replaced by Rodolfo Márquez. One year later, Márquez was replaced by Walter Martínez, after a demonstration with his band Vorax. With Martínez they released their first live album En Vida.

In 1998 they released a self-titled album and Profeta en su Tierra, and in 1999 their fifth studio album, A Fondo Blanco.

In 2001 drummer Martínez was replaced by Bin Valencia. In April they released another album, Piedra Libre, with 10 new songs. During the 2001 tour, Iorio's wife, Ana Mourin, committed suicide.

In September of that year Claudio Marcielo released a solo album entitled Puesto En Marcha. Later in December they released their second live album En Vivo, Obras 2001.

In 2003 they released another studio album, entitled Ultimando, followed by Toro y Pampa in 2006 and a live DVD in 2009 by the name of En Vivo Obras.