Copper Alloys, Aluminium BronzeBS B23 DTD197 Bar

A high strength aluminium bronze used in the aerospace, marine and chemical industries.

Bronzes are copper based alloys with the major alloying element being tin. They offer a combination of properties such as high strength, hardness, corrosion resistance and wear resistance.

Copper aluminium alloys are commonly known as aluminium bronzes. These alloys cover a range of copper-based alloys in which the primary alloying element is up to 14% aluminium.

BSB23 is one of the most popular grades of aluminium bronze with additions of 10% aluminium, 5% nickel and 5% iron to enhance the overall properties of the alloy.

A wrought version of the 10/5/5 aluminium bronze BS B23 is used when the commercial CA104 is deemed not fit for purpose. BS B23 is mainly used in aerospace engineering but is also used in the marine and chemical sectors due to its high strength and excellent resistance to corrosion and erosion in seawater and other aggressive environments. BS B23 is also known for its excellent shock and wear resistance whilst being able to retain its properties at cryogenic temperatures.

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Product FormImperial SizesMetric Sizes
Round Bar38" - 5 12"120mm - 130mm
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Related Specifications

  • BSB23/DTD197
  • BS2872
  • CA104
  • EN12163/5/7
  • CW307G
  • DIN 17665/17672 CuAl10Ni5Fe4
  • C63000
  • C63020
  • ASTM B150


Chemical Composition


  • Valve and pump components
  • Marine equipment
  • Fasteners
  • Engine components
  • High temperature applications
  • Heavy duty bushes and bearings
  • Aerospace components


  • Excellent resistance to erosion & corrosion
  • High strength & toughness
  • Very good galling resistance
  • Non-sparking
  • Retention of mechanical properties at sub-zero temperatures
  • High wear resistance

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