scope:

Part 2 of this NES specifies the requirements for the manufacture, inspection and testing of Aluminium-Nickel-Silicon Brass forgings, forging stock, rods and sections.

Forgings are placed in four classifications. Class 1 to 3 forgings are in descending order of quality assurance requirements. The classes are defined as follows:

Class 1-A forging whose failure would lead to uncontrollable flooding, the total immobilization of the vessel or serious hazard to personnel.

Class 2-A forging whose failure would lead to severe but controllable flooding, the serious disruption of weapon systems, main propulsion machinery, or its attendant auxiliaries including generators.

Class 3-A forging whose failure does not constitute an immediately significant hazard.

Class 4-A forging which is used for forging stock only.

Rods and sections are called for in two grades as follows:

Grade 1-Material for high integrity applications (eg 1st level systems in Nuclear Submarines).

Grade 2-Normal grade material.