OK 68.81
OK 68.81 is a high-alloyed electrode which deposits a ferritic-austenitic duplex weld metal with approx. 40% ferrite. It is resistant to stress corrosion and is highly insensitive to dilution. Good scaling resistance up to 1150°C. OK 68.81 is used for joining dissimilar steels, steels with reduced weldability and buffer layers prior to hardfacing. Applications: rolls, forging dies, hot-work tools, dies for plastics and so on.
Typical Tensile Properties
| As welded | ||
| Elongation | Tensile Strength | Yield Strength |
| 25 % | 114.5 ksi | 88.5 ksi |
Typical Charpy V-Notch Properties
| As welded | |
| Impact Value | Testing Temperature |
| 22 ft-lb | 68 °F |
Typical Weld Metal Analysis %
| weld metal analysis | |||||||
| Mn | Mo | C | Si | Ferrite FN | Ni | N | Cr |
| 0.9 % | 0.04 % | 0.13 % | 0.7 % | 40 % | 10.2 % | 0.09 % | 28.9 % |
| Approvals: | CE; EN 13479; Seproz; UNA 272580 |
| Classifications: | EN 14700; E Fe11; EN ISO 3581-A; E 29 9 R 3 2; SFA/AWS A5.4; E312-17; Werkstoffnummer; 1.4337 |
Approvals are based on factory location. Please contact ESAB for more information.
| Alloy Type: | IMPERIAL_Stainless duplex |
| Coating Type: | Acid Rutile |
| Ferrite Content: | FN 30 - 50 |
| Welding Current: | DC+, AC |