AWS A5.4 PDF

This specification prescribes requirements for the classification of covered stainless steel electrodes for shielded metal arc welding. (Footnote 1)

Chromium content of weld metal deposited by these electrodes is not less than 10.5 percent and the iron content exceeds that of any other element. For purposes of classification, the iron content shall be derived as the balance element when all other elements are considered to be at their minimum specified values. (Footnote 2)

Note: No attempt has been made to classify all grades of filler metals within the limits of the above scope; only the more commonly used have been included.