PB102 / CW451K - Phosphor Bronze

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PB102 / CW451K is the most widely used grade of wrought phosphor bronze in the UK. It contains additions of ~5% Tin and up to 0.4% phosphorus to enhance its wear resistance, mechanical strength and stiffness and corrosion resistance.

The 5% tin containing alloy offers superb spring qualities, a high fatigue resistance, excellent cold forming properties and a corrosion resistance almost equivalent to Aluminium Bronzes in many atmospheric conditions.

PB102 / CW451K also offers a reasonable machinability (20-25% that of free machining brass = 100%), with an excellent soldering, brazing and butt welding capability. It can also be joined reasonably easily using spot welding and gas shielded arc welding, seam welding and coated metal arc welding.

 Related Specifications

PB102

CW451K

C51000

DEF STAN 02-838

NES 838

ISO CuSn5

Mechanical Properties (specification minima 18mm to 40mm dia)

Tensile Strength                          

460N/mm²

0.2% Proof Stress                        

380N/mm²

Elongation                                  

12%


Key Features

  • Good mechanical properties
  • Excellent cold forming properties
  • High wear resistance
  • Very good corrosion resistance
  • Easily joined by brazing and welding
  • Low coefficient of friction
  • Good spring properties

Typical Physical Properties

Density

8.85 gm/cm3

Melting Point

1050?C

Thermal Conductivity

69 W/m?C

Coeff. of Thermal Expansion 20-300?C

17.8 x 10-6

Electrical Conductivity 20?C

15% IACS

Specific Heat

377 J/Kg?K

 Fabrication Properties

Annealing Temperature

675-745?C

Stress Relieving temperature

200-350?C

Hot formability

Limited

Cold Formability

Excellent

Machinability Rating

20%

 Joining Methods

Soldering

Excellent

Brazing

Excellent

Gas shielded arc welding

Good

Coated metal arc welding

Fair

Resistance welding: Spot

Good

                             Seam

Fair

                             Butt

Excellent

 

Typical Applications

Due to its versatility the CW451K / PB102 is utilised in most industrial sectors with some typical applications including marine and chemical hardware, fasteners, pump and valve trim, bushes, bearings, electrical springs, contacts, connectors and switches, worm gears, springs, shafts, flanges, wear guides, architectural and decorative components, lock washers, spring washers and masonry fixings.

This technical information is given by Holme Dodsworth Metals without charge and the user shall employ such information at his own discretion and risk. For more detailed technical advice on temper selection, fabrication, joining, machining, physical and mechanical data please contact us as space does not permit the listing of every feature of the material.

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Holme Dodsworth Metals Limited.
59/69 Heaton Park Road.
Newcastle Upon Tyne NE6 1SQ
Registered in England. Company No. 00842702