We are devoted 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:H13,4130,4140,4150,4340,1035,1045,EN9,EN19,EN24,EN31,51200,SUJ2, 100Cr6,K310,34CrNiMo6,36CrNiMo4, 42CrMo4,86CrMoV7, C35E, C40E, C45E, etc. 2.Hardness: HB240-320 3.Ultrasonic Test: Sep 1921-84 - Test Group 3 Class D or ASTM A388 - FBH max 4mm 4.Forging reduction ratio: ≥4 5.Manufacturing process: steel ingot→forging→rough machining→QT→2th rough machining→finishing machining→packing→delivery 6.Quality required: Surface defect and decarburization shall be free. All dimensions are 100% OK. 7.Packing: wooden box or metal pallet for protection against rust and damage. 8.Quality Management Certification: ISO 9001:2008. Product Name Specification Main Materials marine propeller shaft Dia.80~ Dia.1500mm Length≤12000mm H13,4130,4140,4150,4340, EN9,EN19,EN24,EN31,etc