Profile: United Cast Bar (UK) Limited specializes in offering cast iron bars. We produce unibar in a range of sizes and grades. All grades are produced in standard round, square and rectangle shapes. Unibar 400-15 has a ferritic structure, obtained via heat treatment (130-190 HB), and is therefore used when machinability and a good surface finish are the required characteristics. It is recommended for uses requiring high heat and/or electric conductivity, as well as good magnetic permeability. Unibar 600-3 has a structure that is predominantly pearlitic (>50 percent) in the core, which makes it specially recommended for applications requiring high resistance to wear and maximum strength.