OK 67.50 SMAW Type Acid-rutile E2209-17 Description OK 67.50 is a rutile coated electrode for welding ferritic-austenitic stainless steels, e.g. UNS S31803. Special applications include the welding of pipes with high resistance to stress corrosion up to 300°C, the so-called Duplex steels. OK 67.50 is particularly suitable for welding duplex cargo tanks. Welding current DC+, AC OCV 60 V Classifications EN 1600 E 22 9 3 N L R 3 2 SFA/AWS A5.4 E2209-17 Werkstoff Nr. 1.4462 CSA W48 E2209-17 Typical all weld metal composition, % C Si Mn Cr Ni Mo Cu N <0.03 0.7 0.9 22.3 9.5 3.0 <0.3 0.16 Typical mech. properties all weld metal Yield stress, MPa 660 Tensile strength, MPa 820 Elongation A5, % 25 Charpy V Ferrite content FN 25-40 Test temps, °C Impact values, J +20 50 Approvals ABS For welding duplex steels BV 2209 CWB CSA W48 DNV For duplex SS GL 4462 LR S 31803 RINA 2209 Sepros UNA 409820 UDT EN 1600 VdTÜV 04368
