Section 2 Materials
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Inland Waterways Ships, July 2022 - Part 5 Main and Auxiliary Machinery - Chapter 5 Propellers - Section 2 Materials

Section 2 Materials

Parent topic: Chapter 5 Propellers

2.1 Castings

2.1.1 Castings for propellers and propeller blades are to comply with the requirements of the Rules for the Manufacture, Testing and Certification of Materials. The specified minimum tensile strength is to be not less than stated in Table 5.2.1 Materials for propellers.

Table 5.2.1 Materials for propellers

Material SI units Metric units
Specified G U Specified G U
minimum     minimum    
tensile Density Allowable tensile Density Allowable
strength   stress strength   stress
N/mm2 g/cm3 N/mm2 N/mm2 g/cm3 N/mm2
Grey cast iron 250 7,2 17,2 25 7,2 1,75
Spheroidal or nodular graphite cast iron 400 7,3 20,6 41 7,3 2,1
Carbon steels 400 7,9 20,6 41 7,9 2,1
Low alloy steels 440 7,9 20,6 45 7,9 2,1
13% chromium stainless steels 540 7,7 41 55 7,7 4,2
Chromium-nickel austenitic stainless steel 450 7,9 41 46 7,9 4,2
Duplex stainless steels 590 7,8 41 60 7,8 4,2
Grade Cu 1
Manganese bronze (high tensile brass) 		440 8,3 39 45 8,3 4,0
Grade Cu 2
Ni-Manganese bronze (high tensile brass) 		440 8,3 39 45 8,3 4,0
Grade Cu 3
Ni-Aluminium bronze 		590 7,6 56 60 7,6 5,7
Grade Cu 4
Mn-Aluminium bronze 		630 7,5 46 64 7,5 4,7

2.1.2 Where it is proposed to use materials which are not included in Table 5.2.1 Materials for propellers, details of the chemical composition, mechanical properties and density are to be submitted for approval.

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