Raw material selection Foundation: The composition and quality of steel, alloys, and polymers are the basis of structural components. Quality: Hechuang uses alloy grades suitable for the application scenarios of various components of hydraulic rock drills to manufacture spare parts. Quality: We choose the best special steel producers. Durability: Combining the toughness and hardness of metal materials, our selection of raw materials, and advanced heat treatment processes ensure the quality and durability of spare parts.