Zilin Steel

special steel: ☆. Tungsten Steel RG25, RX15,RX10S,RX10 standard hardness HRA88 ° -91.5 ° ☆. BSW-T15 high wear-resistance standards for high-speed steel powder hardness HRC65.5 ± 1 ° ☆. BSW23 high toughness high-speed steel powder standard hardness HRC64 ± 1 ° ☆. powder 53 high-speed steel, standard hardness HRC61 ° -63 °