Steels represent the most complex and widely used group of alloys in industrial applications, comprising over 80% by weight of all alloys in general use. This comprehensive study examines the fundamental behavior of pure iron, iron-carbon alloys, and the complexities arising from additional alloying elements. Pure iron, when produced with impurity content below 60 ppm, exhibits extremely low strength with resolved shear stress as low as 10 MPa.
Malleable cast iron is a specialized iron-carbon alloy characterized by its unique heat treatment process and resulting mechanical properties. This article comprehensively examines two primary variants: whiteheart and blackheart malleable cast iron. These types differ in their chemical composition, annealing processes, and resulting microstructures.
Manganese Sulphide Inclusions in Steel: Part One
Non-metallic inclusions, particularly manganese sulphide (MnS), significantly influence steel properties with dual effects. While sulphur enhances machinability, it simultaneously compromises critical service properties including forgeability, ductility, toughness, weldability, and corrosion resistance. This article explores how MnS inclusions form during solidification, their classification into three distinct morphological types, and their impact on mechanical properties.