20. CuSn8Zn4

CuSn8Zn4

Common name Material description
World specifications
EuropeanBritishAmerican
Low lead alloy for drinking waterCuSn8Zn4--C90300
(ASTM B 505)

Other name: GREEN ALLOYS, alloys without lead, alloys with very low lead content
The equivalence between the standards is not absolute and some variations in composition can exist.

Chemical Composition in % (ASTM B 505, Castings)

 CuSnPbZnNiAlFeMnPSSiSbAsCrBiCdSe
Min86.07.5-3.0-------------
Max89.09.00.305.01.00.0050.2-0.050.050.0050.2 - - - - -

Mechanical Properties (ASTM B 505, Castings)

RmTensile strength min.303 N/mm2
Rp0.2Proof Strength min.152 N/mm2
AElongation min.18 %
HBBrinell hardness min.-

Properties:

Hard, strong, tough, resistant to wear and fine-grained, good machinability and corrosion-resistant to sea water, good resistance to pounding.

It resists corrosion from seawater and stands up to impacts and wear. It also machines easily and can be cast.

Application:

Worm wheels, gears, bushings for heavy loads and low speeds,

valves, plumbing fixtures, portable water applications, gears, marine fittings and pump components.

Typical applications include aircraft landing-gear bushings, trunnion and trolley wheel bearings, and wristpin bushings.