About Smiths

We are a world-class supplier of engineering raw materials. Our objective is to provide all our customers, from the small machine shop to the large multi-national corporation, a supply path that continuously delivers the highest levels of service, quality and value.

DTD 498 (B25)

Silicon Nickel Bronze

DTD 498 Bronze Alloy

A bronze alloy for very high integrity components, DTD 498 is a solution annealed and precipitation hardened copper nickel silicon alloy.

Aerospace Copper Bronze

A copper bronze alloy containing nickel and silicon, DTD 498 is a UK Ministry of Defence specification designed for aerospace applications, which can be strengthened by heat treatment. The material provides an attractive range of performance characteristics, including high mechanical strength and excellent thermal and electrical conductivity. With good fatigue strength and corrosion resistance, DTD 498 is similar to the requirements of BS 2B 25, NFL 14-701, MSRR 8501, DIN 17672-1 and EN CW112C. Improvements in strength and hardness are achievable with further cold working.


DTD 498 is readily machinable and offers wear, galling and spark resistance characteristics.

Typical Applications

Commercial applications for this engineering material include:

  • Pump & valve components
  • Offshore and marine applications
  • Bushes and high-performance bearings
  • Mechanical seals
  • Undercarriage components

We stock DTD 498 in a variety of shapes.

Technical Assistance

Our knowledgeable staff and resident metallurgists will be pleased to assist you further on any technical topic. Smiths Metal Centres Limited also boasts an in-house UKAS Accredited Testing Laboratory which is unique within the multi-metal and plastic stockholding sector. We believe this underlines our total commitment to quality and our ethos of being the complete service provider.

Additional Info

A technical datasheet for DTD 498 is available in PDF file format. To view and download, please click here.

We offer in-house processing options - for more information, please refer to our processing services.

Read our corporate brochure by clicking here.

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