... chain used for Industry 1.material:40MN/A3 2.pitch:31.750mm 3.plate thickness:4.00mm A series 100 chain used for Industry 1.material ... , 428H, 520, 520H, 530, 530H, 05MA, 05MB, 05MC, 06MC 2. O-Ring Motorcycle chains: 428SO,520SO,525SO,530SO3. Roller chains ... Coupling chains The Chain technic treatment is as below:1.Shot peening2.Bluing3.Phosphating4.Nickel-plated5.Zincing6.Heat treatment7.Carburizing8 ...