• Bimetal : Casting, usually centrifugal, made of two different metals, fused together.
  • Binders : Materials used to hold molding sand together
  • Blacking Carbon : Carbonaceous materials such as plumbago, graphite or powdered coke usually mixed with a binder and frequently carried in suspension in water or other liquid; used as thin facing applied to surfaces of molds or cores to improved casting finish.
  • Blasting (Blast Cleaning) : A process for cleaning or finishing metal objects by use of an air blast or centrifugal wheel that throws abrasive particles against the surface of the work pieces. Small, irregular particles of steel or iron are used as the abrasive in grit blasting, and steel or iron balls in shot blasting.
  • Boil : Agitation of a bath of metal caused by the liberation of a gas beneath its surface. May be deliberately induced by the addition of oxidizing material to a bath containing excess carbon. In the later case it is called a carbon boil and CO or CO2 are liberated.
  • Bond Strength : Property of a foundry sand to offer resistance to deformation.
  • Bulk Density : The ratio of the weight of a material to its over-all volume (including any inherent porosity).