This standard provides requirements for the physical characteristics, test methods and acceptance standards of cast nickel aluminium bronze naval alloy ingots and sand castings with welding permitted to the wetted surface.

In accordance with the classification of castings given in Def Stan 02-863, this standard may be used for:

a) Propellers.

b) Class I and II castings which will not come into contact with sea water.

c) Large/complex Class I and II castings which may come into contact with sea water providing that MOD contractual approval is granted.

d) Class III castings.

This standard does not cover the use of material for:

a) Submarine castings in first level systems.

b) Non first level submarine castings that may come into contact with seawater, except as indicated in Clause 1.2c) above.