... knife 1)High quality,low price 2)Material 65 Mn 3)Usage kogoba,yanmar,John deer ... ,John deer,foton,class,etcThe diffusion knife is 45-50 HRC,material is 65Mn(1566),Process:Forging,and the diffusion ... knife is suitable for cutwe can also supply the ... to visit and any sample or drawing is welcome . good quality low price diffusion knife