Estimation of Martensite Start Temperature

The knowledge of the martensite start temperature (Ms) is very important for the targeted heat treatment of steels.
Therefore, many models have been developed to predict Ms without having to perform time-consuming experiments.

On this page, some of the models for estimating Ms are summarized and used to calculate Ms on basis of the chemical composition of the steel. In addition to the models from literature, a new model ("Ingber") is used for estimation of Ms. This model has been developed for high-carbon, low-alloy steels whose Ms are in the range from 0 to 50°C. However, it is also suitable for low and medium carbon low alloy steels and most medium manganese steels.