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.
Cast iron, in grades normally used for items such as bearing housings, gearboxes or machine beds, has a hardness of about 150 to 200 Brinell. With the addition of alloying elements, usually chrome, nickel or copper, the hardness can be increased to over 700 Brinell.lease browse our website for more information about Durham Foundry and our ability to manufacture Wear Resistant & Ni Hard Cast Iron Castings then contact us on 0114 249 4977 or e-mail us on castings@durhamfoundry.com.