UNE-EN ISO 21952:2008 Welding consumables - Wire electrodes, wires, rods and deposits for gas-shielded arc welding of creep-resisting steel - Classification (ISO 21952:2007)
2013UNE-EN ISO 21952:2013 Welding consumables - Wire electrodes, wires, rods and deposits for gas shielded arc welding of creep-resisting steels - Classification (ISO 21952:2012)
2008UNE-EN ISO 21952:2008 Welding consumables - Wire electrodes, wires, rods and deposits for gas-shielded arc welding of creep-resisting steel - Classification (ISO 21952:2007)