Conforming to ANSI,DIN,JINS,ISO standard and processing according to the customer's requirements. More will see ... , Steel 1020, Steel 1045. 5.Surface treatment: Carburizing, hardening and tempering, nitriding, high frequency treatment, black of oxidation, zincing, ... square meters, have many advanced equipment and over 300 skilled employees3. Save time and money: We specialized in producing all ...