DIN EN 22401:1994 Covered electrodes; determination of the efficiency, metal recovery and deposition coefficient (ISO 2401:1972); German version EN 22401:1994
ISO 2560:1973 Covered electrodes for manual arc welding of mild steel and low alloy steel; Code of symbols for identification
ISO 3690:1977 Welding; Determination of hydrogen in deposited weld metal arising from the use of covered electrodes for welding mild and low alloy steels
DVS 0956-1997 history
1997DVS 0956-1997 Selection and use of welding rods for joint welding of non-alloy steels and fine-grained steels according to DIN EN 499