... .750mm 3.plate thickness:4.00mm A series 100 chain used for Industry 1.material:40MN/A32.pitch:31.750mm3.plate thickness range ... .0088.50109.24.1717.7 Main products as the following: 1.Motorcycle Chains: 25H (04CH), 415, 415H, 420, 420H, 428, 428H ... ,50NP10. Coupling chains The Chain technic treatment is as below:1.Shot peening2.Bluing3.Phosphating4.Nickel-plated5.Zincing6.Heat treatment7.Carburizing8 ...