Oerlikon Tenax 118M description: TENAX 118M is a low-alloyed basic coated MMA electrode with a low hydrogen content. It is generally used for the welding of high strength steels with tensile strength range >760 870 Mpa. The M stands for military standards. For optimal conditions a good balanced t8/5: (heat input, interpass temperature, plate thickness) is recommended. The TENAX 118M is used for main and especially military applications with a higher yield strength up to 690 Mpa and down to -60C. Example T1, HY80. 120% efficiency. Good striking.