Oerlikon Tenax 88S description: TENAX 88S is a low-alloyed basic MMA electrode with low hydrogen content. Suitable for the welding of HYSS Higher yield strength steels: Yield strength < 450MPa. BS 4360-55 e/f and e 450 EMZ. With a high impact energy (down to -60C) and fracture (CTOD) toughness in the as welded and stress relieved conditions. The Tenax 88s is used extensively in offshore oil and gas applications for the all positional welding. 100% efficiency. Excellent operabillity in all welding positions.