Kromorth is a death metal band from Cuiabá, Mato Grosso, Brazil, founded around 1999–2000 by guitarist and vocalist Rodrigo Auad. After a hiatus from 2007 to 2012, the band stabilized with a lineup including Fabio Agassi (guitar), Lincoln Lima (bass), and Elton Bernardino (drums), releasing the full-length debut "Geodesic Beast" in November 2018 through Iron Blood & Death Corporation.

Kronus was a heavy metal band from Rio de Janeiro, Brazil, active from 1985 to 1988. The band released a rehearsal demo in 1985 and a demo titled "Muerte Lenta," covering themes of fantasy, freedom, and war before dissolving.

Krossover is a thrash and groove metal band formed in August 2013 in Reconquista, Santa Fe, Argentina. The band contributed the track "Inhumano" to the regional compilation "Paraná Bandas Oficial EP 7" in August 2016, building a following in the northeastern Argentine metal underground. They maintain an active presence on SoundCloud and Bandcamp as an independent act.

Krow is a thrash/death metal band from Uberlândia, Minas Gerais, Brazil. The band released the debut full-length "Before the Ashes" in 2009 and followed it with "Traces of the Trade" in 2012, the latter produced by American engineer Alan Douches and notable for its thematic focus on Brazilian slavery. The album draws on late-1980s and early-1990s death metal roots with a thrash punch.

Krueger is a death/thrash metal band from Campina Grande, Paraíba, Brazil, formed in 1987. The band's lineup has included Adriano Caminha on vocals and guitar, Zé Carlos on bass, and Maurício Mocardo on drums, and they released the full-length "Turn On to Death" in 2001 through Destroyer Records, recorded at Prosound Studio in Campina Grande.

Kruelty is a death/thrash metal band from Poços de Caldas, Minas Gerais, Brazil, formed in 2017. The band released a live album, "Kruelty Live in Poços de Caldas," in June 2017, featuring nine tracks including a cover of Cannibal Corpse's "Hammer Smashed Face," and later released the "Five Years of Blasphemy" full discography compilation.

Krull is a heavy/power metal band from Itu, São Paulo, Brazil, led by vocalist and guitarist Luís Domingos Krull. The band released "Metal Swords and Fire" in 2016 and followed it with "The Black Coast" in April 2018, the latter recorded and produced by Maurício "Bowie" Nogueira at Aquarela Studios in Itu, blending traditional heavy metal with viking and pagan metal influences.

Krusader is a symphonic power metal band from Jundiaí, São Paulo, Brazil, formed in 1989. The band's debut album "Angus" (2006) is a concept record based on a fantasy saga with a cult following across South America, Japan, Korea, and Italy, featuring vocalist Rick Ricci (known from fellow Brazilian act Skyscraper) alongside guitarist Paulo Soares and keyboardist Fábio Thesta.

Krushhammer is a black/thrash metal band from Belo Horizonte, Brazil, formed in 2019. The quartet — Marcel Krusher (vocals), Nekrolucifer (guitar), Alberth Desecrator (bass), and Philippe Hellish (drums) — debuted with the EP Speed Blacking Hell before releasing their first full-length, Blood, Violence & Blasphemy, in November 2022 through Helldprod Records and Iron Pegasus Records.