scope:

This specification covers carbon and alloy steel forgings for torsional shafts, including propulsion shafts for ships, sleeves, couplings, propeller nuts, rudder stocks, diving plane stocks, and related parts.

The forgings shall be made from the following classes of steel, as specified (see 3.4 and 6.2.1):

Class 1 - Nickel-molybdenum steel

Class 2 - Nickel-molybdenum steel

Class 3 - Carbon steel

Class 4 - Carbon steel

Class 5 - Nickel-chromium molybdenum steel

Class 6 - Nickel-chromium molybdenum steel

intended Use:

The six classes of steel are used to make torsional shafts, shafts for ships, sleeves, couplings, propeller nuts, rudder stocks, diving plane stocks, and related parts.