I have a program that provides properties of the saturated steam on a range of 0,01...220 degC. The input is temperature and the program calculates water vapour pressure at that temperature, entalpy of water, specific volume of water, density of water, enthalpy of steam, specific volume of steam, density of steam, heat of evaporation of water and specific heat of steam, all at the given input temperature. Inversely it calculates the temperature and all other variables at given input pressure. There exists somewhere in my file a complete calculation of water-steam properties according to the VDI tables, where the range of superheated steam is included. The problem is that I do not know how to deliver you my code, if you are interested in. It is written in excel VBa and the older code for the entire range of temperatures in a very old version of Basic ( actually for Sharp 1500!)
regards
Dixiematic