American Standard Austenitic High Manganese Cast Steel Grade, Chemical Composition (Mass Fraction) (%), and Mechanical Proprieties
Introduction
In today’s world, steel is an essential material used in manufacturing, infrastructure and general day to day use of modern living. As such, its properties and properties of its derivatives are actively studied and evaluated. High manganese austenitic cast steel, or A203, is one such derivative of steel, and its properties, composition and uses will be discussed in this paper.
Chemical Composition
In order for a steel alloy to be considered A203 grade, the baseline percentage of each element present that makes up the alloy must be present. The baseline for A203 grade steel is as follows: Carbon (mass fraction) (%), 0.17%, Manganese (mass fraction) (%), 11.5%, Phosphorus (mass fraction) (%), 0.03%, Chromium (mass fraction) (%), 1.2%, Nickel (mass fraction) (%), 8.0%, copper (mass fraction) (%), 0.7%, Molybdenum (mass fraction) (%), 0.6%, Silicon (mass fraction) (%), 0.9%, and Sulfur (mass fraction) (%), 0.03%. Any deviations in the baseline of the chemical composition, though minor, must be considered carefully.
Heat Treatment
Heat treatment of A203 grade steel is done in order to obtain specific properties in the material. In heat treatment, the steel is heated to a given temperature and then either cooled rapidly or air cooled. Rapid cooling is done to obtain higher mechanical properties and air cooling would be done to obtain improved machinability and ductility.
Mechanical Properties
In order to judge its suitability for a particular application, it is essential to examine the mechanical properties of the steel. Typical mechanical properties of A203 at a given temperature are as follows: Ultimate Tensile Strength (σu) (MPa), 600; Yield Strength (σs) (MPa), 500; Elongation (ε), 15%; and Hardness (HB), 32. These properties can be further changed by the heat treatment process.
Uses
A203 grade steel’s properties make it well suited for use in the production of machine components and parts that are subjected to continuous high temperatures and vibrations. Common uses of A203 grade steel include water and steam piping, parts of small ships, component parts for oil and gas, engine components, and machine tool components.
Conclusion
In conclusion, A203 grade steel is an austenitic high manganese cast steel that has found common applications due to its heat treatable properties and its chemical composition. Its mechanical properties provide strength and ductility, and as such, it is often used for producing components for a variety of machinery and industrial purposes.
