Standard Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt Alloys by Various Combustion and Fusion Techniques— 21 стр.
Welding consumables - Rods for gas welding of non-alloy and creep-resisting steels - Classification (ISO 20378:2017); German version EN ISO 20378:2018— 11 стр.