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OK 68.82
SMAW
Type Rutile-acid
OK 68.82 is a high-alloyed electrode which deposits a ferritic-austenitic duplex weld metal with approx. 30-35% ferrite. Resistant to stress corrosion and highly insensitive to dilution. Good scaling resistance up to 1150°C. OK 68.82 is used for joining steels with reduced weldability and buffer layers prior to hard surfacing, dissimilar steels, rolls, alforging dies, hot-work tools, dies for plastic and so on.
Welding current, A
DC+, AC OCV 55 V
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| Classifications | Approvals | Typical all weld metal composition | Typical properties all weld metal | | SFA/AWS A5.4 | | (E312-17) | | EN 1600 | | E 29 9 R 1 2 | | Werkstoff Nr. | | 1.4337 |
| | | C | 0,12 | | Si | 1,0 | | Mn | 0,9 | | Cr | 29,0 | | Ni | 10,0 | | Mo | <0,5 | | Cu | <0,3 |
| Redrying temperature, °C
300
Redrying time, hours
2
Recovery
105
Yield stress, MPa
500
Tensile strength, MPa
750
Elongation, %
25
Elongation, %
25
Ferrite content
FN 50-80
Weld metal hardness, a w
220-240 HV
Machinability
Fair
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| Diameter, mm | 2,0 | 2,5 | 3,2 | 4,0 | 5,0 | | Length, mm | 300 | 300 | 350 | 350 | 350 | | Arc voltage, V | 26 | 25 | 26 | 30 | 30 | | Welding current, A | 40-60 | 50-85 | 55-120 | 75 -170 | 140-230 | | N. Kg weld metal/kg electrodes | 0,54 | 0,52 | 0,52 | 0,55 | 0,55 | | B. No. of electrodes/kg weld metal | 166 | 104 | 55 | 36 | 22 | | H. Kg weld metal/hour arc time | 0,7 | 1,0 | 1,3 | 2,0 | 2,7 | | T. Burn-off time, secs/electrode | 33 | 45 | 57 | 60 | 71 |
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