OK Flux 10.74 – Pipemill flux for longitudinal, multi-wire welding OK Flux 10.74 is an agglomerated, basic flux designed primarily for multi-wire procedures in the production of longitudinal welded line pipes. Classification flux Basicity index Density Grain size EN 760: SA AB 1 67 AC H5 1.4 ~ 1.2 kg/dm 3 0.2 - 1.6 mm Slag type Polarity Alloy transfer Hydrogen Aluminate-basic DC+ / AC Slightly Si and moderately Mn alloying 5 HDM The flux alloys some Si and Mn to the weld metal and works equally well on DC and AC current. It offers best weldability on SAW processes with at least 3 independent welding wires. Flux consumption kg flux / kg wire Voltage DC+ AC 26 0.7 0.6 30 1.0 0.9 34 1.3 1.2 38 1.6 1.4 1,0 0,8 0,6 0,4 0,2 0,0 -0,2 % Si pick-up from flux 450 A 750 A % Si in wire 0,05 0,10 0,15 0,20 0,25 0,30 Single wire, ø 4.0 mm, DC+, 30 V, 60 cm/min 1,8 1,4 1,0 0,6 0,2 -0,2 -0,6 -1,0 % Mn pick-up from flux 450 A 750 A % Mn in wire 0,5 1,0 1,5 2,0 OK Flux 10.74 produces a low bead profile in longitudinal line pipe welding at high welding speeds. A low profile without peaks means cost saving in the later pipe coating operation, since the coating thickness can be reduced. With various wires, OK Flux 10.74 is suited for all pipe steels. In combination with the Ti-B micro alloyed wire OK Autrod 13.64 toughness values are increased to an outstanding level. Due to the careful metallurgical design OK Flux 10.74 produces a weld metal free of hard spots. Classification Wire Weld metal OK Autrod EN / AWS EN / AW AWS / AW AWS / PWHT 12.20 S2 / EM12 S 42 4 AB S2 A5.17: F7A6-EM12 A5.17: F6P6-EM12 12.22 S2Si / EM12K S 42 4 AB S2Si A5.17: F7A6-EM12K A5.17: F6P6-EM12K 12.24 S2Mo; S Mo / EA2 S 46 2 AB S2Mo A5.23: F8A2-EA2-A4 A5.23: F7P0-EA2-A4 12.34 S3Mo; S MnMo / EA4 S 50 2 AB S3Mo A5.23: F9A2-EA4-A3 A5.23: F9P0-EA4-A3 13.64 SZ / EG (two-run classification, see Product Data Sheet) Typical weld metal chemical composition (%), DC+ C Si Mn Cr Ni Mo Other With OK Autrod 12.20 0.07 0.3 1.5 12.22 0.07 0.5 1.5 12.24 0.05 0.4 1.4 0.5 12.34 0.08 0.4 1.6 0.5 Typical weld metal mechanical properties, DC+ ReL / Rp0.2 (MPa) Rm (MPa) A4 / A5 (%) CVN (J at °C) With OK Autrod -18 -20 -40 -51 AW/ SR Remarks 12.20 440 540 30 60 40 AW 12.22 440 540 30 55 35 AW 12.24 520 590 24 65 AW CVN at -29°C: 50 J 12.34 590 670 24 60 55 AW CVN at -29°C: 40 J For more information view the Product Data Sheets or contact ESAB. 40
OK Flux 10.73, 10.74 and 10.77 - for double-sided longitudinal and spiral welded pipes 41