NF A89-233*NF EN ISO 13919-1:2019 Electron and laser-beam welded joints - Requirements and recommendations on quality levels for imperfections - Part 1 : steel, nickel, titanium and their alloys
2019NF A89-233*NF EN ISO 13919-1:2019 Electron and laser-beam welded joints - Requirements and recommendations on quality levels for imperfections - Part 1 : steel, nickel, titanium and their alloys