Def Stan—Defence Standards

Defence Standards (called Def Stan) are issued by the MoD (Royal Navy). There are a number of copper alloys specified for defence applications, in many cases the requirements for these alloys are stricter than those defined in the BS EN series of standards. The current list of Def Stan includes some that have been developed from earlier standards series, e.g. NES (Naval Engineering Standard) and DGS (Director General, Ships). Def Stan include a supersession list and previous designations, to enable manufacturers to relate current standards to old specifications on component drawings.

Many of the copper alloys have been specifically selected or developed to meet certain requirements. For example, 70/30 and 90/10 copper-nickels were developed by the MoD and are now listed in national and international standards. The requirements for the aluminium bronze specified in Def Stan 02-833 define tight limits on the composition, include impact and ultrasonic testing, and specify heat treatment requirements to enhance corrosion resistance. The copper-nickel-managenese specified in Def Stan-02 835 has been developed to meet high strength, ductility and corrosion resistance requirements for applications in submarines.

To view a Def Stan copper alloy specification please visit the Defence Standards Portfolio (registration required).

Def Stan titles for copper alloys explained
Def Stan titles for copper alloys explained
Def Stan No Scope Supersedes
Def Stan 02-747 Part 3 Nickel Aluminium Bronze Castings and Ingots, Commercial Alloy Ingots and Sand Castings NES 747 Part 3
DGS 361
Def Stan 02-747 Part 4 Nickel Aluminium Bronze Castings and Ingots—Sand castings with Welding Restricted to the Non-wetted Surface (Class I and II Castings Only) NES 747 Part 4
DGS 348
Def Stan 02-824 Copper Nickel Chromium Sand Casting and Ingots NES 824
Def Stan 02-830 Gunmetal Ingots and Castings NES 830
DGS 203
Def Stan 02-833 Part 2 Nickel Aluminium Bronze Forgings, Forging Stock, Rods & Sections NES 833 Part 2
DGS 1043
Def Stan 02-834 Part 3 Aluminium Silicon Bronze Ingots and Castings NES 834 Part 3
Def Stan 02-835 High Strength Copper Nickel Manganese Alloy Forgings, Forging Stock Rods and Sections NES 835
Def Stan 02-838 Part 1 Phosphor Bronze—Continuously Cast NES 838
Def Stan 02-838 Part 2 Phosphor Bronze—Wrought Bar Stock NES 838
Def Stan 02-879 Part 1 Copper Alloy Materials in HM Submarines and Surface Ships not in Class—Sheet, Strip and Plate
Annex B—Copper-nickel (70/30) Def Stan 07-253 Part 1
NES 780
Annex C—Copper-nickel (90/10) Def Stan 02-779 Part 1
NES 779
Annex D—Aluminium-silicon bronze Def Stan 02-834 Part 1
NES 834
Annex E—Aluminium-nickel-silicon brass Def Stan 02-749 Part 1
NES 749
DGS 333
Annex F—Nickel Aluminium Bronze Def Stan 02-833 Part 1
NES 833 Part 1
Def Stan 02-879 Part 2 Copper Alloy Materials in HM Submarines and Surface Ships not in Class—Forgings, Forging Stock, Rods And Sections
Annex B—Copper-nickel (70/30) Def Stan 02-780 Part 2
NES 780 Part 2
Annex C—Copper-nickel (90/10) Def Stan 02-779 Part 2
NES 779 Part 2
Annex D—Aluminium-silicon bronze Def Stan 02-834 Part 2
NES 834 Part 2
Annex E—Aluminium-nickel-silicon brass Def Stan 02-749 Part 2
NES 749 Part 2
Def Stan 02-886 Requirements for Wrought Copper-Nickel-Chromium