Alloy Ductile iron casting is characterized by having all of its graphite occur in microscopic spheroids. These graphite consists of about 10% by volume of ductile iron, its compact spherical shape minimizes the effect on mechanical properties. The graphite, which is commercially produced ductile iron is always not a perfect spheres. It can occur in a somewhat irregular form. The difference between the various grades of ductile iron is in the microstructure of the metal around the graphite, which is called the matrix. This microstructure varies with composition and the cooling rate of the casting. It can be slowly cooled in the sand mold for a minimum hardness as-cast or, if the casting has sufficiently uniform sections, it can be freed of molding sand while still at a temperature above the critical and normalized. The matrix structure and hardness also can be changed by heat treatment.
Alnico pot magnets are strong permanent magnets with great temperature resistance and are applicable up to a temperature of 450oc. It produces magnetic field strength at their poles as high as 1500 gauss (0.15 tesla), or about 3000 times the strength of Earth's magnetic field. These magnets are primarily for gripping applications. The outer surface of the magnets can be either painted or coated with zinc, nickel or chrome.
Aluminum bar is used as starting stock when designing and machining steel components. When it is melted down, it makes a variety of custom shapes. All metals & forge melts any type of alloy into the ingots that is used to make their own aluminum bars. It is also used for making robotic chassis and assemblies.