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OK 74.78
SMAW
Welding current, A
AC, DC+ OCV 65 V
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| Classifications | Approvals | Typical all weld metal composition | Typical properties all weld metal | | SFA/AWS A5.5 | | E9018-D1 | | EN 757 | | E 55 4 MnMo B 3 2 H5 |
| | ABS | 3H5, 3Y | |
| BV | 3Y HH | |
| DB | 10.039.17 | |
| DB | 20.039.02 | |
| DNV | 3 YH10 | |
| LR | 3, 3Y H15 | |
| Sepros | UNA 409819 | |
| VdTÜV | 01027 | |
| CE | EN 13479 | |
| | C | 0,06 | | Si | 0,4 | | Mn | 1,5 | | Mo | 0,4 | | P | ³0,02 | | S | ³0,02 | | Cr | ³0,1 | | Ni | ³0,1 | | V | ³0,03 | | Nb | ³0,02 | | Cu | ³0,1 | | Al | ³0,03 | | Sn | ³0,01 | | Ti | ³0,03 | | Pb | ³0,02 | | As | ³0,03 |
| Redrying temperature, °C
350
Redrying time, hours
2
Recovery
125%
Yield stress, MPa
600
Tensile strength, MPa
650
Elongation, %
24
Elongation, %
24
| Charpy V | | Test temps, °C | Impact values, J | | 0 | 100 | | -20 | 90 | | -51 | 60 | | -30 | ²28 |
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| Diameter, mm | 2,0 | 2,5 | 3,2 | 4,0 | 5,0 | 6,0 | | Length, mm | 300 | 350 | 450 | 450 | 450 | 450 | | Arc voltage, V | 22 | 22 | 23 | 23 | 24 | 24 | | Welding current, A | 55-80 | 75-100 | 105-140 | 140-190 | 190-260 | 240-340 | | N. Kg weld metal/kg electrodes | 0,62 | 0,62 | 0,65 | 0,65 | 0,68 | 0,69 | | B. No. of electrodes/kg weld metal | 136,0 | 73,0 | 32,0 | 20,5 | 14,0 | 10,0 | | H. Kg weld metal/hour arc time | 0,7 | 0,9 | 1,3 | 1,8 | 2,6 | 3,6 | | T. Burn-off time, secs/electrode | 38 | 55 | 86 | 97 | 100 | 103 |
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