Oerlikon Tenax 140 description: TENAX 140 is a low-alloyed basic coated MMA electrode with a low hydrogen content. It is generally used for the welding of high yield strength steels < 960 Mpa. The TENAX 140 is used for HYSS, applications with fine grain steels with a yield strength >900Mpa and down to -40C. Example S960QL. The weldmetal is of extremely high metallurgic purity, retaining good ISO-V toughness up to -40C, typically40-60J.