Section 3 Materials
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Naval Ships, January 2023 - Volume 2 Machinery and Engineering Systems - Part 6 Steering Systems - Chapter 1 Steering Gear - Section 3 Materials

Section 3 Materials

Parent topic: Chapter 1 Steering Gear

3.1 General

3.1.1 All components used in steering arrangements for ship directional control are to be of sound reliable construction to the Surveyor’s satisfaction.

3.1.2 All components transmitting mechanical forces to the rudder stock are to be tested according to the requirements of Vol 2, Pt 2 Prime Movers.

3.1.3 Ram cylinders; pressure housings of rotary vane type actuators, hydraulic power piping, valves, flanges and fittings; and all steering gear components transmitting mechanical forces to the rudder stock (such as tillers, quadrants, or similar components) are to be of steel or other approved ductile material, duly tested in accordance with the requirements of Vol 2, Pt 2 Prime Movers. In general, such material is to have an elongation of not less than 12 per cent nor a tensile strength in excess of 650 N/mm2. Special consideration will be given to the acceptance of grey cast iron for valve bodies and redundant parts with low stress levels.

3.1.4 Where appropriate, consideration will be given to the acceptance of non-ferrous material.

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