CuNi25Zn12 – Free machining nickel silver alloy alloyed with Pb

Features and Particularities

Die ARCAP AP1D alloy is an improved corrosion resistant free machining nickel silver alloy. It is alloyed with Pb to obtain a still better machining and longer tool life. High machining speeds up to 150 m/min are achievable according to the used machine tool and tooling.

Very smooth surfaces can be achieved at high cutting speeds with dia-mond cutting tools. This nickel silver alloy permits to obviate and suppress the for-mation of drilling burrs.


The ARCAP AP1D nickel silver alloy is used for fittings, spectacle frames, wear parts
and numerous parts produced by turning.


Material number:ARCAP AP1D


    • The ARCAP AP1D nickel silver alloy is generally machined in the cold deformed(drawn or rolled) condition.
Cutting speed:up to 150 m/min
Lubricant-coolant:individual choice
  • The optimal cutting conditions depend on the machine tool, the cutting tools, the chip dimensions, the lubricant-cooling fluid, as well as the tolerances and surface the roughness to be achieved.


Soft anneal:600-650°C/15-60 min under protective atmosphere
Stress relieving:max. 300°C / m/m 1h


ARCAP AP1D nickel silver cannot be hardened by heat treatment


ARCAP AP1D nickel silver can be strengthened a by cold working and forming


Die microstructure of ARCAP AP1D stay single phase in all deformation operations.

Laser marking

Laser heating and overheating can cause an unintended dezincification of the laser
marking dots with modification of the microstructure, mechanical properties and cor-
rosion resistance.

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