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# DI Predictor
The DI Predictor tool is used to predict the ideal diameter of steel alloys in the DANTE material database by using the phase transformation kinetics and DANTE material models. This utility is commonly used as a material characterization tool. By adjusting the phase transformation kinetics for a specific material in the DANTE database, the user can compare the ideal diameter results with results from actual experimentation and literature.
## Use Case
As mentioned, one use case for the DI Predictor utility is to adjust the material data inside the DANTE material database. In this case, we are trying to calculate the ideal diameter for the 4140 steel as shown below.
Using the utility, the ideal diameter is approximately 110.09 mm.
Both the hardness and phase transformation kinetics can be adjusted within the DANTE material database for the U41XX material at 0.40% carbon to reach the desired value. To adjust the hardness, open the U41XX.HRD file and find the 0.40% carbon level.
In line 62, the 4th value of 57.5 controls the hardness of Martensite. Increasing this value will increase the hardness of Martensite when performing an analysis as shown below.
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