Rukunin jerin 400 na bakin karfe yawanci suna da 11% chromium da 1% manganese karuwa, sama da jerin jerin 300. Wannan silsilar bakin karfe tana iya zama mai saurin kamuwa da tsatsa da lalata a wasu yanayi ko da yake maganin zafi zai taurare su. Jerin 400 na bakin karfe yana da mafi girman abun ciki na carbon, yana ba shi tsarin crystalline martensitic wanda ke ba da samfurin ƙarshe tare da ƙarfin ƙarfi da juriya mai girma. An yi amfani da jerin karafa 400 a cikin kayan aikin noma, masu yin shiru na iskar gas, kayan aiki, ramukan mota, da ƙari.
Lokacin aikawa: Afrilu-25-2020