Copper Alloys, Aluminium BronzeDEFSTAN 02-833 NES833 Bar

A nickel aluminium bronze manufactured to MOD standards primarily used in the marine & offshore industries.

Aluminium Bronze DEFSTAN 02-833 PT 2 Issue 4 September 2018 (NES833) is a nickel aluminium bronze similar to CA104 but manufactured to the requirements of the Ministry of Defence.

The MOD stipulate a nickel content that exceeds the iron content to improve the general corrosion performance. Other requirements include a minimum impact value on sizes above 15mm diameter and a full ultrasonic inspection to conform to Grade 1 material.

This grade has been developed primarily for offshore and marine applications but can also be used in the oil & petrochemical industries (non sparking environments) and features high strength, good ductility, excellent corrosion resistance in seawater and many other aggressive media and a high wear and abrasion resistance. The particular characteristics of DEF STAN 02-833 that enable its impressive physical properties include a nickel content exceeding the iron content in order to achieve good corrosion resistance.

We hold this material already 3.2 certified and ultrasonically tested to ensure that it meets the requirements of DEF STAN 02-729 Part 5 Issue 4, September 2023 and to NDE02-05 latest revision.

Range

Product Form	Size Range
Round Bar	¹⁄₂" - 12"

If you do not see what you are looking for, please contact your local service centre with your specific requirements.

Related Specifications

DEFSTAN (NES) 833 corresponds to the following designations:

DEF STAN 833

Properties

Chemical Composition

Chemical Element	% Present
Copper (Cu)	Balance
Iron* (Fe)	4.0 min - 5.0 max
Aluminium (Al)	8.5 min - 10.0 max
Manganese (Mn)	0.5 max
Nickel* (Ni)	4.5 min - 5.5 max
*Nickel content is to be greater than iron content

Mechanical Property	Value
Proof Stress	400-530 MPa
Tensile Strength	600-760 MPa
Elongation A50 mm	15-5 %
Hardness Vickers	170-220 HV

Physical Property	Value
Density	7.5 g/cm³
Thermal Conductivity	42 W/m.K
Electrical Resistivity	0.172 x 10^-6 Ω .m

Applications

Marine valves
Pumps
Weapons handling systems
Couplings
Fasteners
Gears
Marine propeller shafts
Valve components
Heat exchangers
Pipe fittings
Bearings & bushes
Safety tools
Worm wheels
Thrust washers

Characteristics

High strength and toughness
Outstanding resistance to erosion and corrosion
High wear and galling resistance
Excellent mechanical properties at sub-zero temperatures
Ultrasonically tested
Non sparking

Additional Information

Weldability

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Disclaimer

This Data is indicative only and as such is not to be relied upon in place of the full specification. In particular, mechanical property requirements vary widely with temper, product and product dimensions. All information is based on our present knowledge and is given in good faith. No liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon. Please note that the 'Datasheet Update' date shown above is no guarantee of accuracy or whether the datasheet is up to date.

The information provided in this datasheet has been drawn from various recognised sources, including EN Standards, recognised industry references (printed S online) and manufacturers' data. No guarantee is given that the information is from the latest issue of those sources or about the accuracy of those sources. Material supplied by the Company may vary significantly from this data but will conform to all relevant and applicable standards. As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose, whether expressed or implied. Advice given by the Company to any third party is given for that party's assistance only and without liability on the part of the Company. All transactions are subject to the Company's current Conditions of Sale. The extent of the Company's liabilities to any customer is clearly set out in those Conditions; a copy of which is available on request.