Oerlikon Tenax 118D2 description: TENAX 118D2 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 >600 Mpa, when good impact toughness at low temperature is required. The TENAX 118D2 is used for applications with a higher yield strength up to 600 Mpa and down to -40C.