Sunday, November 29, 2009

Hardenability software for alloy steels:
Hardenability is a handy program for people conducting hardenability measurements.
It allows one to enter steel composition and other austenitizing data and employs the routines given in J-406 and Bofors Handbook to compute the Jominy curve for steels and the curve indicating the variation of hardness across the section of steel bars from surface to center in different ambients.

The primary features of Hardenability software are:
• Allows one to specify the nominal composition of steel and the use of other effective elements on steel hardenability such as Boron and Titanium.
• Allows using inhibitors (Aluminum and Niobium) in alloy steel composition.
• Calculates and plots the Jominy curve.
• Calculates and plots the curve indicating the variation of hardness across the section of steel bars from surface to center in different ambients.
• Calculates the ideal critical diameter.
• Calculates the initial hardness (100% martensite).
• Calculates the hardness of 50% martensite.
• Calculates the factors of each element effect on the alloy steel hardness ( fis).
• Compares the resulted Jominy curve with curves demonstrated in ASTM standard.
• Saves the composition and quenching data of each alloy steel in a file, so you easily can load it.
• Prints the data and graph.
• Support for both Metric and English units.
1- 50 days license
2- Always working license with a small hardware lock
To purchase the software:
To buy our software, simply mail us your request to send you the desired version of software.

The following files are included with this program:
1. Hardenability.exe: The program
2. Dll Files: Data1.dll to Data8.dll
3. 'ASM Metals Handbook' pdf file to compare our calculated results with measured values.
4. Hardenability.pdf (This document)
5. scd Files: Some Steels composition & data saved files
To install Hadenability:
1. Run Setup File from Setup directory
2. Copy the main program and dll data files (Data1.dll to Data.8.dll) to a directory of your choice.
3. Copy the ASM Metals Handbook pdf file in your chosen directory.
We are interested in hearing from people, particularly engineers and industrial workers, who use this program.
Please email us at: or tell us with this Tel No:
0098915 5847205 – Iran- North of Khorasan- Bojnoord
Using the Program:
Hardenability is very easy to use. The major steps involved in creating and working with a new “steel”
1. Start the program.
2. Enter a name of a new steel.
3. Enter data for the steel chemical composition and its heat treatment.
4. Press 'Jominy Curve' buttons to view your steel Jominy Curve.
5. You can save your alloy steel data, load a previous saved steel data, and print the graph and data of steel.
6. You can press 'Go' button to determine the steel bars quenching experiment specifications and its section hardness profile.
7. And finally you can press 'Help' button to view the 'ASM Metals Handbook', useful for comparing the calculated results and measured ones.

Description of Features:
Hardenability gets major steel heat treatment data such as Normalizing or Austenitizing temperature, time of heat treatment and chemical composition of steel from user in several fields. It also has three check boxes to get the main effective elements on alloy steel, like, use of Boron, Titanium and inhibitors like Aluminum and Niobium from user. It can calculate the Jominy curve (HRC Hardness values with respect to distance from quenched end) with either Critical diameter method or the percent of martensite method.
The scale of distance to quenched end in this graph can vary in either millimeter or 1/16 inch units.
Both of above mentioned methods can calculate the Jominy curve, but first method (Critical diameter) obtains it more better. It first calculates some coefficients for each alloy element called ' fi '. These coefficients indicate the effect of each element on calculating the critical diameter. The Hardenability program computes the critical diameter form these factors. It can show this value to user.
By the side of calculating the critical diameter, the Hardenability software computes the grain size of steel from heat treatment temperature and its time, entered by user. It also can demonstrate this value to user. It's necessary to remind that adding the inhibitors such as Aluminum and Niobium to alloy steel, effects the value of grain size.
With using above two main parameters, calculated from input data, and after some other complicated computing, the Hardenability software draws the Jominy curve for steel. This curve indicates the variation of Hardness in HRC scale with respect to the distance of quenched end in Jominy experiment. In this experiment, a standard bar of Austenitized alloy steel is exposed to water spray and its hotness will be quenched. As a result, the different points along the steel bar will harden with various rates and so, their hardness will be a function of distance to the quenched end.
After drawing the Jominy curve, the user can watch the obtained results such as elements factors (fi), grain size, critical diameter and the data of Jominy curve through two special buttons adjusted for this aim. He also can save input data for each steel in special files with extension 'scd', means: 'Steel composition & data' and print all of the above data in only a single page. Furthermore, he easily can load the saved data for each steel through 'Open' button.
As mentioned previously, Hardenability software has the ability to compute the Jominy curve with another method, called: 'The percent of martensite in the steel structure'. In this manner, after calculating the grain size, the percent of martensite in the steel structure, will be obtained at the different distances from the quenched end in the Jominy experiment. The next steps are calculating the cooling rate from above obtained data, and computing the harness value for each phase of alloy steel, such as martensite, bainite and ferrite-pearlite with respect to distance of quenched end. The final HRC hardness profile is the sum of above three profiles. It's necessary to remind, this method can not obtain critical diameter value and is limited for steels contain only these six elements: 'Carbon' , 'Magnesium' , 'Silicon' , 'Nickel' , 'Chromium' and 'Molybdenum' and ignores the effect of some important elements such as 'Boron', 'Titanium' , 'Vanadium' and 'Copper'. Furthermore, its response is not very accurate.
One another main ability of Hardenability program is computing the profile of HRC hardness variation across the section of either round or flat steel bars, quenched uniformly in a specific ambient, from surface to center and drawing its variation curve.
In this part, the Hardenability software gets the main dimensions of steel bar such as bar diameter for round bars and its section breadth and thickness for rectangular bars. It also gets the quenching ambient specifications like its name (Air, Oil, Water or Brine) and its agitation (in the scale cm/s and the range 0-1000) or equivalent quenching severity (H). Processing these input data, the software obtains the HRC hardness profile across the bar section with respect to distance form surface. The scale of this distance can be either millimeter or 1/16 inch.
The figures below show different screens of the Hardenability program environment:

Figure (1) Hardenability program main screen,
containing a sample steel input data and Jominy curve
picture: refer on the weblog

Figure (2) Indicating the elements factors

Figure (3) Indicating resulted Jominy data

Figure (4) The screen of adjusting the steel bar dimensions and quenching ambient parameters with the resulted HRC hardness curve
(Hardness profile across the bar section with respect to distance to its surface)

Figure (5) A view of printing the output data

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