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544
Bronze 544 (Phosphor Bronze/Tin Bronze) Product Guide
Applications | Specifications | Mechanical and Chemical Data | Tolerances
Overview
Also known as tin bronze or phosphor bronze because this alloy contains higher amounts of tin and phosphorus. These additions increase the strength, corrosion resistance, and wear resistance of the alloy. The higher lead content of 544 bronze results in poor performance in hot working and welding, but good cold workability, soldering, and brazing. It has a high machinability rating as well, and is typically used for electrical connectors, bushings, gears, pinions, screw products, thrust washers, valves, and shafts.
Common Trade Names
UNS C54400, CDA 544, C544, Free-Cutting Phosphor Bronze
Other Resources
Weight Calculator | Mill Test Reports
Products
Applications
- Electrical Connectors
- Bushings
- Gears
- Valves
- Shafts
Specifications
ASTM |
---|
B139 |
Physical Properties 544 | |||||
-H04 | |||||
---|---|---|---|---|---|
Density | 0.321 lb/in3 | ||||
Ultimate Tensile Strength | 71.5 ksi | ||||
Yield Tensile Strength | 60.2 ksi | ||||
Shear Strength | 40 ksi | ||||
Shear Modulus | 5,660 ksi | ||||
Hardness Rockwell | Brinell | B85 | 163 | ||||
Elongation at Break Percentage | 17.5% | ||||
Modulus of Elasticity | 14,900 ksi | ||||
Poisson's Ratio | 0.32 | ||||
Machinability Percentage | 80% | ||||
Melting Point | 1,710-1,830 °F | ||||
Specific Heat | 9.08 x 10^-2 BTU/lb-°F | ||||
Thermal Conductivity | 604 BTU-in/hr-ft^2-°F | ||||
Electrical Conductivity | 19% IACS |
Chemistry Information
|
|
Element |
Percentage |
Fe | 0 - 0.1 |
Cu | 85.4 - 91.5 |
Zn | 1.5 - 4.5 |
Sn | 3.5 - 4.5 |
Pb | 3.5 - 4.5 |
Residual | 0 - 0.5 |
P | 0.01 - 0.5 |