... from the side plate, guiding material when feeding and discharging. 5,Protective full welding with CO2 molding bed.6,Four holes connecting ... plant with advanced heat treatment technology1,Inside and outside chain plate:40Cr . 2,Pin shaft :20CrMnMo . 3,Sleeve :20CrMo . 4, ... the lengthening of the pitch. 3,External chain plate is punched into bending plate structure. And it is convenient to fix the ...