ABS Technical Bulletin #6

Special Elemental Symbols

The ABS System has several elemental symbols reserved that allow you to represent special metallic and non-metallic constituents.

The elemental symbol “OEACH” has been reserved to allow you to control the total amount of residual or “tramp” constituents in any grade/alloy specification. OEACH is defined as the sum of the analysis of all non-controlled (residual) elements plus the sum of all OEACH-defined elements. OEACH-defined elements are designated by having a minimum aim of “*”.

To use this feature, the symbol “OEACH” must first be added (in upper or lower case) as an element in the Master Directory. Next, add the symbol “OEACH” to each grade/alloy aim specification in which you want to control the total amount of residuals (via the Grade Editor program).

To indicate that an element is also an “OEACH” element, the minimum must be an asterisk (*). To accomplish this, click on the element’s minimum value column and press <F4> (or click on F4-OEACH on the menu bar at the top of the screen). An asterisk (*) will then appear. For example:

The symbol “OEACH” was added and a specification of 0 to .12 was entered to indicate the total amount of residuals allowed. The minimum values for MN, NI, ZN, and BE were entered as an “*” (by pressing <F4>) to indicate that these elements are to be included with the “OEACH” residual elements.

In the theoretical analysis below, the total of all residual and OEACH-defined elements (highlighted in yellow) did not exceed the maximum OEACH aim of 0.0147 (shown in red):

NOTE: If an element has a minimum value greater than zero, it cannot be considered as an “OEACH” element.

The following elemental symbols have been reserved to allow you to represent special non-metallic constituents. The chemistry information entered for any of the following special symbols will not be subtracted from the balance element:

NOTE: These symbols are not case-sensitive and may be entered in upper and/or lower case letters in the Master Directory. However, all occurrences of “O” must be entered as the letter O and not a zero.

If these special symbols are used, you can control minimum and maximum amounts desired by adding the element to your charge design aims.

For example, if you have entered “Oil” to your list of valid elements in your Master Directory, you can then specify a maximum and/or minimum amount desired in the charge:

In addition, you can create your own non-metallic symbols via the ASCII text file NONMETAL.KSI. Symbols created can be a maximum of 5 alphanumeric characters and must also be added to the Master Directory’s element table. An example of the file NONMETAL.KSI is shown below:

Previous Technical Bulletin | Next Technical Bulletin | Technical Bulletin Listing