... with good mechanical properties, good low temperature impact toughness and low notch sensitivity. Good hardenability of steel, water- ... 40mm. This steel is quenched things, except for cyanide and high frequency quenching. Cutting preferably, when the hardness of ... 2nd Floor, 33rd Building, Headquarters Enterprise Base, Cuizhu Street and Ruida Road, High-tech District, Zhengzhou, Henan, China TEL ...