Bu metallning asosi ko'p asrlar oldin boshlangan, ammo jarrohlik po'lat deb hisoblangan po'lat Birinchi jahon urushi boshlanishidan sal oldin kashf etilgan. 1913 yil 8 avgustda Sheffieldda ingliz Harry Brearley krom va ugleroddan iborat po'lat qotishmasi kislorodlanmasligini anglab yetdi.
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence