Daido Steel Co.,Ltd. Started manufacturing special steel in 1916, the Hi-Q products are being offered in such trades as auto, electron etc. Tool steel is ranked among its maj prod. and has a wide various kinds, among them, die-casting mold steel: DHA-WORLD,DH31-EX are the registered steel grade of NADCA. Lately, we have developed DHA-GIGA(new)for Gigacasting. Welcome to our booth for further info.