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OK 74.46
SMAW
Type Basic
OK 74.46 is an LMA electrode with 0.5 % Mo for welding steels for pressure vessels. The running characteristics makes it suitable for welding joints in inclined positions. The composition of the coating is adapted to welding on low currents making OK 74.46 very suitable for welding of pipes.
Welding current, A
DC+, AC OCV 65 V
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| Classifications | Approvals | Typical all weld metal composition | Typical properties all weld metal | | SFA/AWS A5.5 | | E7018-A1 | | EN 1599 | | E Mo B 32 H5 |
| | | C | 0,06 | | Si | 0,5 | | Mn | 0,7 | | Mo | 0,5 | | P | ³0,02 | | S | ³0,02 |
| Redrying temperature, °C
350
Redrying time, hours
2
Recovery
115%
Yield stress, MPa
460
Tensile strength, MPa
560
Elongation, %
27
Elongation, %
27
| Charpy V | | Test temps, °C | Impact values, J | | +20 | 175 | | 0 | >31 |
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| Diameter, mm | 2,0 | 2,5 | 3,2 | 3,2 | 4,0 | 5,0 | 6,0 | | Length, mm | 300 | 350 | 350 | 450 | 450 | 450 | 450 | | Arc voltage, V | 22 | 23 | 23 | 25 | 26 | 27 | 28 | | Welding current, A | 55-80 | 75-110 | 105-150 | 105-150 | 140-200 | 190-270 | 260-370 | | N. Kg weld metal/kg electrodes | 0,59 | 0,59 | 0,54 | 0,59 | 0,65 | 0,65 | 0,65 | | B. No. of electrodes/kg weld metal | 136,0 | 73,0 | 53,0 | 37,0 | 22,5 | 14,5 | 10.0 | | H. Kg weld metal/hour arc time | 0,7 | 0,9 | 1,0 | 1,2 | 1,8 | 2,4 | 3,4 | | T. Burn-off time, secs/electrode | 40 | 55 | 66 | 81 | 90 | 104 | 108 |
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