圧延鋼[atsuenkou] rolled steel
丸鋼[marukou] round steel bar
協力鋼[kyouryokukou] high-tension steel
鋼管[koukan] steel pipe
鋼玉[kougyoku] corundum

鋼材[kouzai] steel material
鋼索[kousaku] cable
鋼線[kousen] steel wire
鋼鉄[koutetsu] steel