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OK 67.53
SMAW
Type Rutile
OK 67.53 is a rutile-coated electrode for welding ferritic austenitic stainless steel, e.g. UNS S31803. Special applications are welding of pipes with high resistance to stress corrosion up to 300°C, the so called Duplex steels.
Welding current, A
DC+, AC OCV 55 V
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| Classifications | Approvals | Typical all weld metal composition | Typical properties all weld metal | | EN 1600 | | E 22 9 3 N L R 1 2 | | SFA/AWS A5.4 | | (E2209-16) | | Werkstoff Nr. | | 1.4462 |
| | DNV | For duplex SS | |
| UDT | EN 1600 | |
| VdTÜV | 05422 | |
| | C | <0,03 | | Si | 0,9 | | Mn | 0,9 | | Cr | 23,0 | | Ni | 9,5 | | Mo | 3,3 | | Cu | <0,3 | | N | 0,18 |
| Redrying temperature, °C
350
Redrying time, hours
2
Recovery
102
Yield stress, MPa
660
Tensile strength, MPa
840
Elongation, %
25
Elongation, %
25
Ferrite content
FN 25-40
| Charpy V | | Test temps, °C | Impact values, J | | +20 | >40 |
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| Diameter, mm | 2,0 | 2,5 | 3,2 | | Length, mm | 265 | 300 | 350 | | Arc voltage, V | 24 | 23 | 25 | | Welding current, A | 25-60 | 30-80 | 70-110 | | N. Kg weld metal/kg electrodes | 0,64 | 0,63 | 0,57 | | B. No. of electrodes/kg weld metal | 170 | 96 | 51 | | H. Kg weld metal/hour arc time | 0,5 | 0,7 | 1,3 | | T. Burn-off time, secs/electrode | 41 | 54 | 56 |
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