... tolerance, parallelism, packing, cleanness. General Standard 1,Fork bodies: 40Cr,4140,15B37 Fork bodies:20Cr Tube:20# Chemical Composition Material No ... treatment.4,Crack detection must be done for every fork after shot blasting.5,Producting standard:ISO 23286,Inspecting ... with Fork-lift trucks-Hook-on type fork arms and fork arm carriages-Mounting dimensions(ISO2328/2002) and Fork-lift trucks-Fork arms ...