SteCal 3.0 is a program for predicting the properties obtained from heat treating low-alloy steels. Available for the first time in user-friendly Microsoft Windows format, SteCal calculates the parameters and behavioral properties representative of low-alloy steels, and predicts the effects of heat treating such steels. It is an excellent tool for heat treaters to use in estimating and refining heat treating parameters for unfamiliar steels. SteCal is also useful for comparing the properties of two steels of different composition, which can help to suggest the most appropriate composition for a particular application.SteCal is based on the most effective and precise heat treating calculation routines available. It can be used to predict heat treating data such as lower critical temperature, critical point of heating, highest feasible tempering temperature, austenitizing temperature, susceptibility to quench cracking, and hardness obtained from various treatments. The program can be used to generate CT diagrams, IT diagrams, hardness versus tempering curves (with calculated tensile strength, yield strength, and elongation values), and Jominy end-quench hardenability curves. Data can be viewed as graphs or tables.SteCal 3.0 is compatible with Windows XP and Windows 7.