Magnesium is a mineral found in a wide variety of foods. Inside of our bodies we mostly find magnesium in our bones (60-65%), in our muscles (25%) and in other cell types and body fluids. Magnesium cannot be made in our body like all minerals, which is why we need to take it in through magnesium-rich foods.
The Brinell hardness number (HB) is the load divided by the surface area of the indentation. The diameter of the impression is measured with a microscope with a superimposed scale. The Brinell Hardness Number is computed from the equation: P is the applied load of 3000, 1500, or 500kg.
The Vickers hardness has the same basic principle as with all common measures of hardness, is to observe the questioned material's ability to resist plastic deformation from a standard source. According to our experience, as for the iron and steel castings, the Brinell hardness is more common in China.