The calculator loads up much quicker in Internet Explorer than Netscape. Compositions of Alloys F igures for common compositions of alloys will be available for Aluminium, Copper, Cast Iron, Magnesium, Nickel and Steel in the explanatory notes These can also be called up directly from the left frame of the calculator page. Derivation of Calculator T he calculator assumes that all additions made for losses are lost so do not figure in the composition although they obviously are included in the charge. A complication occurs when the additions for losses form part of the hardener. In this case the composition of the base element can be lower than is really necessary.
Impurities can also move the composition off target.
Impurites introduced from the hardener appear as a negative addition in the charge sheet because they should not be there. T he calculator was developed from a Quattro Pro spreadsheet using SmartTable , a program which converts spreadsheeets to Java applets, unfortunately no longer available. It should be noted that a similar conversion can be carried out with the Excel 2000 spreadsheet program. However the resultant calculators will only run on Microsoft browsers and therefore are of limited value for use on the internet. Java is a program language which instructs your browser how to perform the calculations.