A higher hardness of 420 grade can be achieved by heat treatment like subsequent quenching, especially fits for application of cutters and nozzle.With high contents of C and Cr and addition of Mo & V, 425 has a higher strength, hardness, abrasive resistance and anti-corrosion than 420J, and used in the fields of cutters,  The compositions and mechanical properties of products are complied to international norm.With high strength, hardness, wearing resistance, and corrosion resistance, 420J2/1.4116(425M) is mainly applied in cooking utensil and nozzle.