CSN EN 10177 This document specifies a flame atomic absorption spectrometric method (FAAS) for the determination of calcium content in non-alloy and low alloy steels. The method is applicable to calcium contents between 4 µg/g and 120 µg/g. The method can be adapted to higher calcium contents by changing the test portion or the dilution process, provided the criteria in 6.2.2 and 6.2.3 are still met. Original English text of CSN EN Standard. The price of the Standard included all amendments and correcturs.