Bronze Alloys - Bronze PB102 Properties, Fabrication and Applications

Bronzesare 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 ofCopper 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 PB102is a Phosphor Bronze.Along with the very similar alloy C51800, PB102 is the most widely used of the wrought phosphor bronzes.

Chemical Compositionof Bronze alloy PB102

Table 1.Typical chemical composition forbronze alloyPB102

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

Propertiesof Bronze alloy PB102

Mechanical Propertiesof Bronze alloy PB102

Table 2.Typical mechanical properties forbronze alloyPB102

Half Hard Properties	PB102
Tensile Strength (MPa)	650
Proof Stress 0.2% (MPa)	560
Elongation A5 (%)	3
Hardness VPN	75-230

Physical Propertiesof Bronze alloy PB102

Table 3.Typical physical properties forbronze alloyPB102

Property	Value
Density	8.85 g/cm3
Melting Point	930 °C
Modulus of Elasticity	121 GPa
Electrical Resistivity	0.96 x 10-6Ω.m
Thermal Conductivity	63 W/m.K

Alloy Designations

Bronze alloy PB102corresponds to the following designations:

CEN	BS	UNS	ISO
CW451K	PB102	C51000	CuSn5

Corrosion Resistanceof Bronze alloy PB102

Bronze alloy PB102has good corrosion resistance, almost equivalent to that displayed by the AluminiumBronzes.

Fabricationof Bronze alloy PB102

Cold Workingof Bronze alloy PB102

Cold working response ofBronze alloy PB102is excellent.

Hot Workingof Bronze alloy PB102

Hot formability ofBronze alloy PB102is poor.

Heat Treatmentof Bronze alloy PB102

Solution treatment or annealing ofBronze alloy PB102can be done by rapid cooling after heating to 500-700°C.

Machinability

The machinability rating ofBronze alloy PB102is rated as poor at 20 compared to Alloy 360 FC Brasswhich is rated as 100.

Welding and Joiningof Bronze alloy PB102

• Soldering, brazing and butt welding ofBronze alloy PB102are 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”.

Applicationsof Bronze alloy PB102

Bronze alloy PB102is typically used in:

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

Supplied Form

Bronze alloy PB102is 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 visitAalco - Ferrous and Non-Ferrous Metals Stockist.