C544 Phosphor Bronze

C544 is a free-machining phosphor bronze designed to provide significantly better machinability than conventional phosphor bronze while retaining good strength, wear resistance, corrosion resistance, and fatigue performance. Compared with C510, C544 is better suited for CNC turning, drilling, and threading, particularly in high-volume precision component production.

Appearance & Properties

Color: Reddish-brown to golden-brown

Density: Approx. 8.9 g/cm³

Tensile Strength: Approx. 350–550 MPa (depending on material condition)

Corrosion Resistance: Good

Machinability: Excellent

Wear Resistance: Good

Fatigue Resistance: Good

Electrical Conductivity: Moderate to low

Magnetism: Non-magnetic

Surface Finishes: Polishing, nickel plating, tin plating, silver plating, etc.

Typical Applications

C544 Phosphor Bronze is widely used in automotive, electrical and electronics, instrumentation, industrial machinery, telecommunications, and precision hardware.

Typical parts include bushings, sleeves, connectors, terminals, threaded components, nuts, washers, gears, instrument components, and high-volume CNC turned parts.

Advantages

• Excellent CNC machinability

• Good wear and corrosion resistance

• Good strength and fatigue performance

• Good chip-breaking characteristics for volume production

• Better suited for complex turned components than conventional phosphor bronze

Limitations

• Lower electrical conductivity than pure copper and some conventional phosphor bronzes

• Lower strength than some high-strength copper alloys

• Generally more expensive than conventional brass

• Contains lead, so regulatory requirements should be verified for food-contact, drinking-water, and restricted-substance applications