Steel grit refers to steel particles used for various purposes either as abrasive or peening media. They result from steel shot with the major difference being in the shape and size of the particles. They are made by crushing steel shot which makes them smaller in size. The edges are very sharp and feature some broken sections. Producers say it is harder than shot even though the hardness may be varied from one type to another.
Advanced technology has rendered it easier to customize this commodity to great levels. In Los Angeles steel grit is made in three major categories, that is GL, GH, and GP. Of the three categories, GP is the softest. This category has a rounded external form due to shaping using steel water. Strengthening is done by use of special techniques to harden and make it strong with great fatigue resistance and elasticity.
GL is harder than GP and like GP, it loses the characteristic sharp edges during production due to shot blasting. It is best suited for preparing surfaces for painting or other applications and descaling. GH has maximum hardness with angular edges. This category produces smooth uniform surfaces when applied in surface treatment. It is recommended that it be used only in wheel machines mostly with compressed air blasting machines.
Beginners find it difficult to decide on the right commodity to use so as to achieve excellent surface preparation. This writing therefore presents some key points to consider when making the decision. When deciding, the most vital aspects to keep in mind are shape, hardness, and size. Hardness chosen must be based on nature of contamination or surface being cleaned and the velocity of propulsion during application. The price also varies with toughness hence should be considered also.
Hardness implies that the product is in a position to resist being deformed upon impact with the substrate it is propelled against. Breakage during application is reduced by balancing hardness with brittleness. Tough pellets can clean surfaces faster hence saving on time as compared to small sized pellets. The hardness of the selected pellets should be dictated by the work surface.
The size is the other important factor to consider when buying grit. Larger particles are able to give higher impact than smaller ones. Manufacturers grade the pellets in a way that they are all of same size to ensure uniformity of results. In case of a mixture, pellet size remains significantly the same.
The applications of this commodity are wide and varied. The major ones are cutting, blasting, and peening. When applied as a blast medium it removes contaminants on a wide range of surfaces. In peening applications, it imparts compressive strength for loading metal components such as automotive springs, heavy appliance crankshafts, and jet engine turbine blades. In cutting, the pellets are used in gang.
Manufacturers do different tests on their products to ensure optimal performance. Some of these tests include metallographic and spectrographic analysis, particle fatigue testing, variable durability analysis, micro hardness testing and several others. It would be difficult to determine performance without these tests.
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The Basics Concerning Los Angeles Steel Grit
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