PB104 / CW453K / BSB24

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PB104 / BSB24 / DTD265A is a high performance wrought phosphor bronze containing approximately 8% tin. The tin addition gives exceptional bearing, wear and spring properties, together with excellent fatigue and corrosion fatigue properties in marine and other corrosive environments.

The combination of properties on offer from PB104 / BSB24 material enables its utilisation in a wide spectrum of industries. Individual applications include high strength fasteners, bearing bushes, drive shafts, pump and valve components, valve guides, electrical clamps, connectors and switchgear.

Related Specifications

PB104

CW453K

BSB24

DTD265A

C52100

CuSn8 / CuSn8P

Chemical Composition

Copper

Rem

Tin

7.5-9.0%

Phosphorus   

0.02-0.40%

Zinc

0.30% max

Nickel

0.30% max

Iron

0.10% max

Lead

0.05% max

Total Imps

0.30% max


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

Tensile Strength                          

500N/mm²

0.2% Proof Stress                         

360N/mm²

Elongation

18%

 Key Features

  • High strength and hardness
  • Very good corrosion resistance
  • Excellent wear resistance
  • Resistance to shock loading

Typical Physical Properties

Melting Point

1040 °C

Density

8.8 g/cm3

Specific Heat                                       

377 J/Kg°K

Coefficient of thermal Expansion

17 x 10-6 per °C

Thermal Conductivity                             

46 W/m °C

Electrical Conductivity

12% IACS

Electrical Resistivity

15 microhm cm

Modulus of Elasticity                              

105,000 N/mm2

Modulus of Rigidity                                

39,000 N/mm2

Fabrication Properties

Annealing temperature

475-675°C

Stress relieving temperature

200-350°C

Hot formability

Poor

Cold formability

Good

Machinability rating

20%

 
Joining Methods

Soldering

Excellent

Brazing

Good

Oxyacetylene welding

Fair

Gas Shielded arc welding

Good

Resistance Welding: Butt

Excellent

                              Spot

Good

                              Seam

Fair

Typical Uses

The PB104 / BSB24 material is commonly used in aerospace and marine fasteners, nuts, bolts, thrust washers, lock washers, pinions, heavy duty bearings, bushes, pump components and connecting rods. The high wear resistance also lends itself to other applications including press guide bushes and gears; driving pinions, axels, hinges, engine valve guides and seats as well as components in the chemical, textile, papermaking and other manufacturing industries.

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