V30 (old V3) Uses: fine series: a high strength and high impact resistance. Applicable: all kinds of medium / thick film. Thick silicon steel, electrical sheet, stainless steel sheet stamping, into blocks of material, molding and other ultrafine particles Series: with high wear resistance. Applicable: all kinds of thin sheet metal stamping, sheet copper, sheet aluminum, silicon thin, thin stainless steel sheet, wear parts. Carbide / tungsten steel with high hardness and wear resistance, commonly used in the manufacture of metal cutting tools, measuring tools, such as mold. Usually when high hardness, high wear resistance; flexural strength, impact toughness is also high. However, the higher the hardness, flexural strength and toughness lower. High-speed steel for high flexural strength and impact toughness, and good processability, is still the most widely used tool material, followed by carbide.