This family of brass powders (copper-zinc) are mixed with ¾% Lithium Stearate for die lubrication. The particle size is nominally -60 mesh (-250µm) with an irregular particle shape to aid in compacting.
A 90Cu-10Zn alloy powder, sometimes called Commercial Bronze, used to produce hardware, marine parts, and mechanical components to MPIF CZ-1000 specifications. It has a reddish bronze color and the highest electrical conductivity among the standard P/M brasses.
An 80Cu-20Zn alloy powder sometimes called Low Brass, used to produce battery caps, medallions, hardware and tokens. It has a classic brass color.
A 70Cu-30Zn alloy powder, sometimes called Cartridge Brass, used to produce automotive parts, ammunition, fasteners, plumbing, and pump parts to MPIF CZ-3000 specifications. It has a bright brass color and the lowest electrical conductivity among the standard P/M brasses.
The manufacture of brass P/M parts involves the control of many variables and is much more sensitive to processing than ferrous materials. Sintering temperatures from 1500°F to 1700°F (815°C to 926°C) are used. Higher sintering temperatures give increased strength, elongation, and electrical conductivity. However, dimensional control is extremely sensitive at high temperatures. In general, the higher zinc content grades should be sintered at the lower temperatures.