Nb-stabilized MMA-electrode for welding Nb- or Ti-stabilized stainless steel of the 19Cr10Ni-type. OK 61.81 has a better hot cracking resistance compared with OK 61.80. Owing to the quite high ferrite content level, the working temperature should be limited to maximum 400°C.
Specifications
Approvals are based on factory location. Please contact ESAB for more information.Typical Tensile Properties |
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Condition | Yield Strength | Tensile Strength | Elongation |
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AWS |
As Welded | 560 MPa | 700 MPa | 31 % |
ISO |
As Welded | 550 MPa | 700 MPa | |
Typical Charpy V-Notch Properties |
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Condition | Testing Temperature | Impact Value |
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AWS |
As Welded | 20 °C | 60 J |
ISO |
As Welded | -10 °C | 71 J |
Typical Weld Metal Analysis % |
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C | Mn | Si | Ni | Cr | N | Nb | Ferrite FN |
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0.06 | 1.7 | 0.7 | 9.7 | 20.2 | 0.08 | 0.72 | 7 |
Deposition Data |
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Diameter | Current | Voltage | Efficiency (%) | Fusion time per electrode at 90% I max | Deposition Rate |
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2.5 x 300.0 mm | 50-80 A | 29 V | 59 % | 36 sec | 1.2 kg/h |
3.2 x 350.0 mm | 75-115 A | 23 V | 60 % | 66 sec | 1.2 kg/h |
4.0 x 350.0 mm | 80-160 A | 24 V | 60 % | 66 sec | 1.7 kg/h |
5.0 x 350.0 mm | 140-210 A | 25 V | 60 % | 78 sec | 2.3 kg/h |