Steam97 Application

Steam Tables desktop application based on IAPWS-IF97

For Windows 7 / Windows 8 / Windows 8.1 / Windows 10 / Windows 11

Steam Tables Desktop Application

About Steam 97 Application

The steam tables application calculates 30 thermodynamic and transport properties of water and steam is SI and English units. It allows 16 different combinations of input variables to be used for calculations.

Input variables that can be used are:

  •  1 Pressure
  •  2 Temperature
  •  3 Enthalpy
  •  4 Entropy
  •  5 Volume
  •  6 Internal energy
  •  7 Steam quality

Main features of the application:
  • Professional quality, industrial strength software, proven in real world applications
  • Based on the international standard formulation (IAPWS-IF97)
  • Includes Mollier diagrams
  • Developed in C++ for maximum speed
  • Copy and paste calculated results to Excel or other applications
  • Copy and paste Mollier (steam) diagrams to Excel or other applications
  • One year free technical support

The following figure shows the log P-H diagram generated with the Steam97 application.

h-s diagram generated with the Steam97 application

h-s diagram generated with Steam97 application

Steam Diagrams

Here is the list of currently available diagrams generated by the application:

  •  1 T-S Diagram
  •  2 T-H Diagram
  •  3 H-S Diagram
  •  4 H-S Vapor Diagram
  •  5 P-T Diagram
  •  6 log P-S Diagram
  •  7 log P-H Diagram

Used Formulations

The library uses new industrial formulation for steam tables, called "IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam (IAPWS-IF97)", and replaces the previous industrial formulation for steam tables, IFC-67.

IAPWS-IF97 improves significantly both accuracy and speed of the calculation of the thermodynamic properties compared with the old formulation.

For transport properties calculations are based on the latest internationally accepted equations also available from IAPWS.

Steam 97 Application Functionality

The Steam97 is a standard win32 application. It is very ease to use, after selection of units (SI or English are supported) and completed calculation for entered parameters, results are displayed in the output table.

Obtained results can be saved to a file, printed, or copy and pasted to Excel or any other application.
Calculated points can be displayed on seven different steam diagrams and steam diagrams can be copy and pasted to Excel or any other application that allows image insertion.

Steam diagrams are available only in SI units.

For calculations performed in English units, points are first converted to SI units and then displayed on SI diagrams.

If you need to display points on steam diagrams in English units, you can use our web application Steam Tables Online.

User privileges

Installation of the application requires administrative privileges.

Use of the applications requires standard user privileges or better.

Steam Properties

The following thermodynamic and transport properties can be calculated with the Steam 97 Application:

Calculable properties in SI or E units - Steam97 Application v4.2
  1 Pressure
  2 Temperature
  3 Density
  4 Specific volume
  5 Specific enthalpy
  6 Specific entropy
  7 Specific internal energy
  8 Specific isobaric heat capacity
  9 Specific isochoric heat capacity
 10 Speed of sound
 11 Isentropic exponent
 12 Specific Helmholtz free energy
 13 Specific Gibbs free energy
 14 Compressibility factor
 15 Steam quality
 16 Region
 17 Isobaric volume expansion coefficient
 18 Isothermal compressibility
 19 Partial derivative (dV/dT)p
 20 Partial derivative (dV/dP)T
 21 Partial derivative (dP/dT)v
 22 Partial derivative (dP/dV)T
 23 Isothermal Joule-Thomson coefficient
 24 Joule-Thomson coefficient
 25 Dynamic viscosity
 26 Kinematic viscosity
 27 Thermal conductivity
 28 Thermal diffusivity
 29 Prandtl number
 30 Surface tension

Range of Validity

The entire set of equations of the IAPWS-IF97, used by the application for calculation of thermodynamic properties, is defined by the following temperature and pressure range:

  • 273.15 K <= T < = 1073.15 K    p < = 100 MPa
  • 1073.15 K < T < = 2273.15 K    p < = 50 MPa

Steam97 Range of Validity

Fig.1 Steam table regions defined in the IAPWS-IF97


1. General Properties View

Steam97 General Properties View

Fig 1. Steam97 Application - General Properties View

2. log P-H Diagram View

logP-H Diagram View

Fig 2. Steam97 Application - logP-H Diagram


To install the application successfully you must have administrative privileges on your computer.

Steam97 Desktop Application

- Download Steam97 Desktop Application version (4.2) - demo

You can also evaluate the Steam Tables library (based on IAPWS-IF97) online, visit Steam Tables Calculator web application. It uses the same calculation engine as the Steam97 desktop application.

Price info

Prices subject to change without notice!

Steam97 Application version 4.2
1-4 licensesUSD 199.95 per copy
5-20 licensesUSD 174.95 per copy
21 > licensesUSD 149.95 per copy
Company wide licenseUSD 4995.00


Each license also includes the following:

  • One year free e-mail technical support
  • One year free minor version updates if available (for example 4.3, 4.x up to, but not including version 5.0)

If you have any questions, please don't hesitate to contact sales. Contact information is provided on the following page:

 Contact Us - (opens in a new tab)

General Information

For quick access to the Steam97 Application, you may purchase and download our product using automated and secure online ordering system.
After ordering, you will receive a notification mail with further instructions for how to download and install the software.

The Registration includes a free subscription program. Each Registered user will be receiving bug fixes and technical support for the registered version within one year.

Shipping by the postal mail is not available.

How to order

1. Internet ordering

Available ordering options (open an order form to select):

  • Credit Card (Visa®, Mastercard®, American Express®, Discover®)
  • PayPal
  • Amazon

To buy a specific number of licenses for the Steam97 Application click the button: Open order page for the Steam97 Application.

To purchase a Company Wide License contact sales. Contact information is provided on the following page:
 Contact Us - (opens in a new tab)

2. Bank Direct Payment

If you prefer to pay for the product by "Bank Direct Payment", contact sales. Contact information is provided on the following page:

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