OK 61.85
OK 61.85 is a basic Nb-stabilized electrode designed for welding of Nb- or Ti-stabilized stainless steels of the 19Cr10Ni-type. It has very good resistance against intergranular corrosion. OK 61.85 provides the best hot cracking resistance of the E347 type electrodes due to the combination of the high ferrite content level and the basic coating. Ferrite may transform to brittle phases at elevated temperatures. To avoid excessive embrittlement of the welds the maximum working temperature is limited to 400°C.
Typical Tensile Properties
| ISO As welded | ||||
| Elongation | Tensile Strength | Yield Strength | Testing Temperature | Testing Time |
| 40 % | 90 ksi | 72.5 ksi | - | - |
| ISO Stress relieved | ||||
| Elongation | Tensile Strength | Yield Strength | Testing Temperature | Testing Time |
| 40 % | 93 ksi | 72.5 ksi | 1112 °F | 16 hr |
| AWS As welded | ||||
| Elongation | Tensile Strength | Yield Strength | Testing Temperature | Testing Time |
| - | - | - | - | - |
Typical Charpy V-Notch Properties
| ISO As welded | |||
| Impact Value | Testing Temperature | Stress Relieved Testing Temp | Stress Relieved Testing Time |
| 74 ft-lb | 68 °F | - | - |
| 52 ft-lb | -76 °F | - | - |
| - | -184 °F | - | - |
| ISO Stress relieved | |||
| Impact Value | Testing Temperature | Stress Relieved Testing Temp | Stress Relieved Testing Time |
| 59 ft-lb | 68 °F | 1112 °F | 16 hr |
| 29.5 ft-lb | -76 °F | 1112 °F | 16 hr |
Typical Weld Metal Analysis %
| weld metal analysis | |||||||
| Mn | C | Nb | Si | Ferrite FN | Ni | N | Cr |
| 1.7 % | 0.04 % | 0.61 % | 0.4 % | 6 % | 10.2 % | 0.07 % | 19.5 % |
| Approvals: | NAKS/HAKC; 2.5-4.0 mm; Seproz; UNA 272580; VdTÜV; 05663 |
| Classifications: | EN ISO 3581-A; E 19 9 Nb B 2 2; SFA/AWS A5.4; E347-15; Werkstoffnummer; 1.4551 |
Approvals are based on factory location. Please contact ESAB for more information.
| Alloy Type: | Austenitic CrNi |
| Coating Type: | Basic |
| Ferrite Content: | FN 6-12 |
| Welding Current: | DC+ |