Product Information

Water Atomized Powder (Copper, Tin, and Copper Alloys, Nickel)

The powder is formed by blowing high-pressure water against high-temperature molten metal, so that the metal scatters and hardens into particles as it rapidly cools while falling.
Though the particles are already powderized at this point, the particle size profile for the product is adjusted by sieving.

Product Categories Metal Powders > Water Atomized Powders
Main Applications Energy > Power generation equipment > Powder metallurgy (oil-impregnated bearings and machinery parts) Automobiles > Powder metallurgy (oil-impregnated bearings and machinery parts) Automobiles > Friction materials
Main ingredients Cu (copper) Ni (nickel) Sn (tin) Zn (zinc)
Manufacturing method Water atomization
Shape Irregular shape

Metal powders with various alloy compositions can be manufactured by melting metal powders together during a melting process. Due to its fast cooling rate, the particles solidify before surface tension acts, so that irregularly shaped particles are formed. Furthermore, by changing the mesh size during the sieving process, the powder is offered in a variety of particle sizes. Due to the good compactibility provided by the irregularly shaped particles, the powder is used widely as an ingredient in powder metallurgy, such as for oil-impregnated bearings and sintered machinery parts.

 Grade Composition
Flow Rate
Particle Size Distribution (mass %)
+150 μm +45 μm -45 μm
Cu-AtW-100 Cu100 2.2-3.6 - ≦5 30-70 30-70
Cu-AtW-250 Cu100 2.6-3.8 - - - ≧80
Bro-AtW-100 Cu90 Sn10 3.0-5.0 - 3 30-70 30-70
NS-At(2)-100 Cu64 Ni18 Zn18 3.0-3.8 - 3 30-70 30-70
Cu-Co-At-100 Cu97 Co3 3.3-4.0 30 5 30-60 40-70
Sn-AtW-250 Sn100 1.9-2.6 - 63μm 5 20 ≧80
Bra-At-100 Cu70 Zn30 2.9-3.6 35 5 40-70 30-60