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OK 92.55
SMAW
Type Basic
OK 92.55 is an all-positional, basic coated electrode which deposits a NiCr-based alloy with additions of Mo, W and Nb. The electrode is specifically designed for welding of 9Ni steels for cryogenic applications down to -196°C.
Welding current, A
AC, DC+ - OCV 55 V
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| Classifications | Approvals | Typical all weld metal composition | Typical properties all weld metal | | SFA/AWS A5.11 | | ENiCrMo-6 | | EN ISO 14172 | | E Ni 6620 (NiCr14Mo7Fe) |
| | ABS | ENiCrMo-6 | |
| BV | N50, N90 | |
| DNV | For welding NV 1,5Ni to NV 9 Ni | |
| | C | 0,05 | | Si | 0,3 | | Mn | 3,0 | | Cr | 13,0 | | Ni | 69 | | Mo | 6,2 | | W | 1,6 | | Nb | 1,3 | | Cu | <0,3 | | Fe | 5,0 |
| Redrying temperature, °C
300
Redrying time, hours
1-2
Recovery
150-155
Yield stress, MPa
>430
Tensile strength, MPa
>690
Elongation, %
>35
Elongation, %
>35
Ferrite content
FN 0
| Charpy V | | Test temps, °C | Impact values, J | | -196 | >70 |
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| Diameter, mm | 2,5 | 3,2 | 4,0 | 5,0 | | Length, mm | 350 | 350 | 350 | 350 | | Arc voltage, V | 23 | 22 | 22 | 23 | | Welding current, A | 65-115 | 70-150 | 120-200 | 150-240 | | N. Kg weld metal/kg electrodes | 0,70 | 0,66 | 0,67 | 0,68 | | B. No. of electrodes/kg weld metal | 55 | 34 | 23 | 14 | | H. Kg weld metal/hour arc time | 1,1 | 1,5 | 1,9 | 2,8 | | T. Burn-off time, secs/electrode | 70 | 68 | 82 | 91 |
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