Get TTT and CCT Diagram with Steel Composition
Instructions: Type in the Steel Compositions and CCT details and and press 'Make Graph'.
(Make sure that concentration of alloying elements are less than 5 wt.%)
Austenitizing Temperature / Kelvin (you can input 0, if you wish T = Ae3':
Minimum Cooling Rate K/s:
Maximum Cooling Rate K/s:
Minimum Time in Graph:
Maximum Time in Graph:
The email address and personal information
provided in this webpage will not be shared with or sold to any third
party or outside organization.
This takes about 45 seconds when the server is not busy, longer if it
If you get a "no data" result, please try again. If you continue to experience problems, contact firstname.lastname@example.org
- Overall alloying element concentration should
be less than 5-6 wt.%.
- Minimum carbon concentration 0.03 (you can
experiment, if problem occurs you will get time out error.Also if you
give zero carbon concentration, it will assume 0.01 wt.%).
- 100 data points (will change in future
- The axis ranges are fixed (will change later on).
References for TTT & CCT prediction
- H. K. D. H. Bhadeshia: Metal Science, 1982, 16, 159-165
- S. S. Babu: "Acicular Ferrite and Bainite in Steels," Ph.D Thesis, University of Cambridge, UK, 1992.
The programs and procedures on this website are provided
"AS IS" without warranty of any kind. EWI makes no warranties,
express or implied, that the programs and procedures
are free of error, or are consistent with any particular
standard of merchantability, or that they will meet the
requirements for any particular application.
THE PROGRAMS AND PROCEDURES SHOULD NOT BE RELIED
ON FOR SOLVING A PROBLEM WHOSE INCORRECT SOLUTION
COULD RESULT IN INJURY TO A PERSON OR LOSS OF PROPERTY.
Use of the programs or procedures in such a manner,
it is at your own risk. Edison Welding Institute disclaims all
liability for direct, incidental or consequential damages
resulting from the use of programs or procedures on this website.
The information herein was prepared as an account of work sponsored
by an agency of the United States Government at the Oak Ridge National Laboratory.
Neither the United States Government nor any agency thereof, nor any of its employees,
nor UT-Battelle or any other United States Government contractors,
subcontractors or their employees, makes any warranty, express or implied,
or assumes any legal liability or responsibility for the accuracy, completeness,
or any third party’s use or the results of such use of any information or process
disclosed, ore represents that its use would not infringe privately owned rights
The on-line calculations are for educational purposes only and are based on published work in the literature. Some of the modules were developed at Oak Ridge National Laboratory (ORNL) and have been made available to EWI members as a part of the memorandum of understanding between ORNL and EWI. For additional information, please contact Edison Welding Institute