General purpose steel

Amongst the formulae and data models used to calculate the mechanical properties of general purpose steel, purely phenomenological data models, micrometric or nanometric models based on metal physics are distinguished. These call upon dislocation dynamics or Monte Carlo methods. This article summarises the numerical values of the conventional data models based on the effect of grain size (Hall-Petch effect) and other hardening parameters. They can calculate the yield and resistance of ferritic steels and ferrite perlite. Several formulae are given for interstitial-free steels, ferrite-bainite and ferrite-martensite mixes (dual phase). Considering the advantages of these data models in improving manufacturing regularity, they are used in real time. To this effect grain-size prediction, phase changes and potential precipitation modules are established.