OK 67.20 SMAW Type Acid-rutile OK 67.20 is a thin coated acid rutile electrode of 23Cr13Ni3Mo type. It has been designed for positional welding including vertical down. The crack resistance is very good. Commonly used for dissimilar welds between stainless to mild or low alloy steel. Welding current DC+, AC OCV 50 V Classifications Approvals Typical all weld metal composition, % Typical mech. properties all weld metal EN 1600 E 23 12 2 L R 1 1 SFA/AWS A5.4 (E309MoL-16) Werkstoff Nr. 1.4459 C <0,03 Si 1,0 Mn 1,0 Cr 23,0 Ni 13,0 Mo 2,8 Cu <0,5 Yield stress, MPa 480 Tensile strength, MPa 640 Elongation, % 35 Elongation, % 35 Ferrite content FN 12-20 Charpy V Test temps, °C Impact values, J +20 60 Redrying temperature, °C 250 Redrying time, hours 2 Recovery 105 Diameter, mm 2,5 3,2 Length, mm 300 350 Arc voltage, V 25 26 Welding current, A 50-80 75-110 N. Kg weld metal/kg electrodes 0,66 0,59 B. No. of electrodes/kg weld metal 91 48 H. Kg weld metal/hour arc time 1,1 1,4 T. Burn-off time, s/electrode 37 55