HPb59-1 Brass

HPb59-1 is a widely used free-cutting leaded brass consisting primarily of copper, zinc, and approximately 0.8%–1.9% lead. The lead addition significantly improves machinability and chip breaking, making it particularly suitable for CNC turning, drilling, threading, and high-volume production of precision components.

Appearance & Properties

Color: Golden yellow to brass yellow

Density: Approx. 8.5 g/cm³

Tensile Strength: Approx. 370–550 MPa, depending on product form and temper

Corrosion Resistance: Good

Machinability: Excellent

Formability: Good, particularly for hot working

Electrical Conductivity: Moderate

Magnetism: Non-magnetic

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

Typical Applications

HPb59-1 Brass is widely used in automotive, industrial equipment, pumps and valves, instrumentation, hardware, and fluid-control systems.

Typical parts include valve components, pipe fittings, bolts, nuts, screws, bushings, nozzles, connectors, and various high-volume CNC turned components.

Advantages

• Excellent CNC machinability and chip breaking

• Suitable for high-speed turning and volume production

• Good machined surface quality and dimensional accuracy

• Good combination of mechanical properties and corrosion resistance

• Particularly suitable for valves, fittings, and threaded components

Limitations

• Contains lead and may not be suitable for certain food-contact, drinking-water, or restricted-substance applications

• Lower strength than high-strength copper alloys and steels

• Relatively limited cold-forming capability

• Dezincification and stress-corrosion risks should be considered in certain environments