CZ137

CZ137 is a 60/40 alpha-beta brass alloy with lead additions for free machining properties. It is designed mainly as an engraving brass and features good strength and ductility typical of alpha-beta brasses. Its machining capability is about 50% of the benchmark CuZn39Pb3 free-cutting brass. It has excellent capacity for hot working but poor cold workability, making it suitable for forming by hot processes.

Chemical Composition

• Copper (Cu): Typically around 60%

• Zinc (Zn): Around 40%

• Lead (Pb): Added for machinability (specific % varies)

• Other minor additives possible

Mechanical and Fabrication Properties

• Balanced alpha-beta structure for strength and some ductility

• Machinability approximately 50% compared to CuZn39Pb3

• Poor cold workability; excellent hot workability

• Good corrosion resistance

Typical Uses

• Engraving plates and components

• Applications where free-machining combined with moderate strength is required