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Co-Reduced Tungsten Heavy Metal Powders
The co-reduced tungsten heavy metal powders produced at Buffalo Tungsten are manufactured by the addition of metal powders to tungsten raw material prior to the reduction process. The mixture is then reduced in a hydrogen furnace. This co-reduction process allows for the wetting of the additive metals to the tungsten particles, resulting in higher green strength after compaction. Nickel, Copper, and Iron are the primary additive metals and may be used in any combination. These co-reduced powders are used to produce tungsten heavy metal alloys which combine the high density and wear properties of tungsten yet allow the alloy to remain machinable. Common combinations are shown here below with customer specified combinations available on request.
COMMON CO-REDUCED POWDERS
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TYPE
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W %
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Ni %
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Cu %
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Fe %
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AVG. SIZE
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APPARENT DENSITY
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STANDARD SCREENING
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DNC-90
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90
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6
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4
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-
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7.0 - 9.0
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60 - 75
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-100 Mesh
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DNF-90
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90
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7
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-
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3
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6.0 - 8.0
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55 - 65
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-100 Mesh
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DNF-94
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93.7
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4.2
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-
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2.1
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6.0 - 8.0
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55 - -70
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-100 Mesh
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ANALYTICAL REPORTSA Certificate of Analysis (COA) accompanies each shipment of tungsten carbide powder. BTI’s own Powder Metallurgy QC Laboratory prepares each COA to include the following:
- Average Particle Size (Fisher Sub-Sieve ASTM B-330)
- Apparent Density (Scott Volumeter ASTM B-329) ]
- Particle Size Distribution (Photelometer ASTM B-430, Sedigraph, or Malvern Mastersizer)
- Chemical Impurity Analysis
PACKAGINGAvailable in 500 lb/250 kg drums or 50-100 lb/25-50 kg pails
NOTES
- All powders are commercially uniform in purity.
- Higher apparent densities available as per customer request.
- Also available mesh sizes for screening are 270 & 325 mesh as per customer request.
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