... 3.ISO9001 ,SAE 4.Durability 3000times 5.Hardness,41-63HRC Cast Steel Grit1. Steel grit : G10/G12/G14/G16/G18/ ... per year SAEApplicationG-12G-14G-16Blasting/descaling medium-to-large cast steel, cast iron, forged pieces, steel plate and rubber adhered work ... , container, ship hall before painting; Cleaning small-to-medium cast steel, cast iron, forged pieces, etc.G-50G-80G-120Blasting/descaling steel ...