Metal Finishing Guide Book

2012-2013

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46 Spherical Cleaning, finishing peening���light-medium and deburring Glass Beads None <1 5.5 Specific gravity Free silica content, % Free iron content, % Hardness (Moh) High Fast None Rough anchor High Low High 8-200 U.S. mesh High Low Low/none High High Range (various matte) None High High 20-325 U.S. mesh Low Medium Toxicity Metal removal Cleaning rate Peening ability Finish achieved Surface contamination Suitability for wet blasting Suitability for dry blasting Size ranges available Consumption rate Cost comparison High 7.5 <1 100 2.4-2.7 Tan Granular General cleaning where metal removal and surface contamination are not considered Coarse Abrasives (e.g., sand) None 2.45-2.50 Color Media Comparisons: Clear Shape Physical Properties: Applications: Table I. Impact Media Comparison Chart High 6-200 U.S. mesh Low High High/medium Medium/high High Peened (shot): rough anchor (grit) High/medium Low None 7.5 95-100 None 7.6-7.8 Gray Spherical/irregular Rough general cleaning and high intensity peening Metallic Abrasives (e.g., steel and iron shot/grit) High 80-325 U.S. mesh High High/medium High Fast None Various matte High Low Low 9.0 <1 <1 2.4-4.0 Brown/white Angular Cleaning where smooth finish and surface contamination are not important Fine Angular Abrasives (e.g., aluminum oxide) High 60-325 U.S. mesh High Medium/low None Slow None Smooth Medium/high Low Low/none 1.0 None None 1.3-1.4 Brown/tan Irregular Light deburring and cleaning of fragile items Organic Abrasives (e.g., walnut shells)

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