... to provide large marine shaft and shaft system, including propellershaft, screwshaft, rudderstock,intermediate shaft, square rudder stock, tail shaft and other marine ... forging products The details of marine propeller shaft as follows,1.Material:H13,4130,4140,4150,4340 ... 9001:2008. Product Name Specification Main Materials marine propeller shaft Dia.80~ Dia.1500mm Length≤12000mm H13,4130,4140, ...