Bronze Alloys - Bronze PB102 Properties, Fabrication and Applications

Bronzes are copper-based alloys. Major alloying elements are often, but not always, zinc and tin. They offer a combination of properties such as high strength, hardness, corrosion resistance and wear resistance.

Phosphor Bronzes

Phosphor Bronzes are alloys of Copper and Tin. PB102 has good corrosion resistance and is known for its high fatigue strength. It also shows a good combination of strength and ductility.

Alloy PB102

Bronze alloy PB102 is a Phosphor Bronze. Along with the very similar alloy C51800, PB102 is the most widely used of the wrought phosphor bronzes.

Chemical Composition of Bronze alloy PB102

Table 1. Typical chemical composition for bronze alloy PB102

Chemical Element

% Present

Tin (Sn)

4.50 - 5.50

Iron (Fe)

0.0 - 0.10

Lead (Pb)

0.0 - 0.02

Nickel (Ni)

0.0 - 0.20

Others (Total)

0.0 - 0.20

Phosphorous (P)

0.01 - 0.40

Zinc (Zn)

0.0 - 0.20

Copper (Cu)

Balance

Properties of Bronze alloy PB102

Mechanical Properties of Bronze alloy PB102

Table 2. Typical mechanical properties for bronze alloy PB102

Half Hard Properties

PB102

Tensile Strength (MPa)

650

Proof Stress 0.2% (MPa)

560

Elongation A5 (%)

3

Hardness VPN

75-230

Physical Properties of Bronze alloy PB102

Table 3. Typical physical properties for bronze alloy PB102

Property

Value

Density

8.85 g/cm3

Melting Point

930 °C

Modulus of Elasticity

121 GPa

Electrical Resistivity

0.096 x 10-6 Ω.m

Thermal Conductivity

63 W/m.K

Alloy Designations

Bronze alloy PB102 corresponds to the following designations:

CEN

BS

UNS

ISO

CW451K

PB102

C51000

CuSn5

Corrosion Resistance of Bronze alloy PB102

Bronze alloy PB102 has good corrosion resistance, almost equivalent to that displayed by the Aluminium Bronzes.

Fabrication of Bronze alloy PB102

Cold Working of Bronze alloy PB102

Cold working response of Bronze alloy PB102 is excellent.

Hot Working of Bronze alloy PB102

Hot formability of Bronze alloy PB102 is poor.

Heat Treatment of Bronze alloy PB102

Solution treatment or annealing of Bronze alloy PB102 can be done by rapid cooling after heating to 500-700°C.

Machinability

The machinability rating of Bronze alloy PB102 is rated as poor at 20 compared to Alloy 360 FC Brass which is rated as 100.

Welding and Joining of Bronze alloy PB102

  • Soldering, brazing and butt welding of Bronze alloy PB102 are rated as “excellent”.
  • Oxyacetylene welding, seam welding and coated metal arc welding are rated as “fair”.
  • Spot welding and gas shielded arc welding are rated as “good”.

Applications of Bronze alloy PB102

Bronze alloy PB102 is typically used in:

  • Gears
  • Worm Gears
  • Bushes
  • Marine applications
  • Aircraft applications
  • Chemical applications
  • Springs

Supplied Form

Bronze alloy PB102 is typically supplied by Aalco in the following form:

  • Drawn round rod
  • Plate
  • Hard sheet

DISCLAIMER

This Data is indicative only and must not be seen as a substitute for the full specification from which it is drawn. In particular, the mechanical property requirements vary widely with temper, product and product dimensions. The information is based on our present knowledge and is given in good faith. However, no liability will be accepted by the Company is respect of any action taken by any third party in reliance thereon.

As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose.

Any advice given by the Company to any third party is given for that party’s assistance only and without liability on the part of the Company. Any contract between the Company and a customer will be subject to the company’s Conditions of Sale. The extent of the Company’s liabilities to any customer is clearly set out in those Conditions; a copy of which is available on request.

This information has been sourced, reviewed and adapted from materials provided by Aalco - Ferrous and Non-Ferrous Metals Stockist.

For more information on this source, please visit Aalco - Ferrous and Non-Ferrous Metals Stockist.

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