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