Copper Alloys, Aluminium BronzeBSB 25 DTD498 Bar & Forgings

A copper bronze alloy containing nickel and silicon for very high integrity components.

DTD498 is a copper-nickel-silicon alloy that is a UK MOD specification designed for aerospace applications. This alloy provides a combination of high mechanical strength and notch ductility whilst still able to possess superior electrical and thermal conductivities.

It has excellent bearing properties, resistance to corrosion and hydrogen embrittlement and low magnetic permeability and is used for very high integrity components.

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Related Specifications

BS B25
BS 2B 25
BS 3B 25
C18000
C64700
CW111C
CuNi2Si

Properties

Chemical Composition

Chemical Element	% Present
Nickel (Ni)	2.00 - 3.50
Silicon (Si)	0.40 - 0.80
Copper (Cu)	Balance

Mechanical Property	Value
Elongation A50 mm	15 %
Hardness Rockwell C	159-207 HRC
Tensile Strength	586 MPa

Applications

Offshore & marine: Non-magnetic naval architecture and high strength fasteners (non-magnetic and cryogenic)
Aerospace: Bearing cages, aircraft undercarriage components, fasteners and bearings
Industrial: Fasteners, engine valve guides and seats, pump and valve components, high performance bearings, bushes, gears safety tools, mechanical seals, electrical contacts, resistance welding electrodes and brake pads

Characteristics

Excellent electrical and thermal conductivity
Low magnetic permeability
Resistance to corrosion and hydrogen embrittlement
High mechanical strength
Good fatigue strength
Readily machinable
Good wear resistance
Good galling resistance

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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.