Igwe anaghị agba nchara maka mgbawa mmanụ ala, sered dị ka fumace tubes, ọkpọkọ mgbanwe okpomọkụ na
pipelines na mmanụ ala na ụlọ ọrụ na-esi mmanụ. High mma carbon structural ígwè akara ule bụ 20g,
20mng na 25mng; Alloy structural ígwè akara ule: 15mog, 20mog, 12crmog, 15CrMoG, 12Cr2MoG, 12CrMoVG, wdg