Trademark Alloys


PB104, sold by Columbia Metals as COLBRONZE, is a wrought phosphor bronze which provides exceptional bearing properties in severe operating conditions. Its high tin content (8%) and addition of phosphorous ensure superior wear, fatigue and corrosion resistance to ordinary phosphor bronzes and gun metal. PB104 is an alloy of choice for demanding marine and corrosive environments.

Related Specifications of PB104

  • C52100
  • CW453K
  • BS B24
  • BS 2B24
  • BS 2874
  • DTD265A
  • 2.1030
  • CuSn8

Nominal Composition of PB104

Cu rem, Sn 8.0%, P 0.2%

Mechanical Properties of PB104

Ultimate Tensile Strength (N/mm²) Proof Stress (N/mm²) Elongation (%) Hardness (HB)
450-500 300-400 15-20

Key Features of PB104

  • Exceptional bearing properties
  • Excellent wear resistance, fatigue strength and frictional properties
  • Excellent tensile and fatigue strength
  • High ductility
  • High corrosion resistance

Applications of PB104

Offshore & marine | Fasteners, nuts, bolts, thrust washers, lock washers, pinions, bearings, bushes and connecting rods

Automotive | Heavy duty bearings, bushes and gears; driving pinions, axels, hinges, engine valve guides and seats

Other | Components for the chemical, textile, papermaking and other manufacturing industries including press guide bushes, chemical hardware and pump components

Columbia Metals – a leading supplier of PB104

With decades of experience and a huge range of stock, Columbia Metals is an industry leader in the supply of PB104 and other high quality specialist engineering alloys.

To buy or learn more about PB104 contact us now, or fill in the enquiry form on the right hand side and we will be in touch shortly.

  Related Specifications Mechanical Properties
Alloy Name BS UNS BS EN Others Ultimate Tensile Strength N/mm² Minimum Yield Strength N/mm² Elongation % Hardness HB  
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