Wednesday, March 28, 2012

Designating Alloyed Steels

How to count the Percentage of Alloy


Alloyed steels are designated according to their chemical composition. The norms deal mainly with low alloyed steels used for construction purposes. The content of alloying components in low alloyed steels is less than 5 percent by weight. High alloyed steels contain alloying components in amounts greater than 5 percent by weight. They are characterized by the symbol X before the specification of constituents.

Only the symbols for alloying elements important to the properties of the steel are included in its designation. The alloying code numbers after the symbols specify the content of alloying elements. The mean nominal content of the alloying component can be calculated by dividing the code number by the multiplier fixed for the element in question.


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