OK 61.81

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Mô tả

OK 61.81

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.

 

Classifications: EN ISO 3581-A:E 19 9 Nb R 3 2, SFA/AWS A5.4:E347-16, Werkstoffnummer :1.4551
Approvals: CE EN 13479, DNV 347, NAKS/HAKC 3.2 mm

Approvals are based on factory location. Please contact ESAB for more information.

 

Welding Current: DC+, AC
Ferrite Content: FN 6-12
Alloy Type: Austenitic CrNi
Coating Type: Rutile

 

Typical Tensile Properties
Condition Yield Strength Tensile Strength Elongation
AWS
As welded 560 MPa 700 MPa 31 %
Creep resistance+ 500°C 20000h 310 MPa
Creep resistance 600°C 10000h 135 MPa
Creep resistance++ 500°C 10000h 330 MPa
ISO
As welded 550 MPa 700 MPa

 

Typical Charpy V-Notch Properties
Condition Testing Temperature Impact Value
AWS
As welded 20 °C 60 J
ISO
As welded -10 °C 71 J

 

Typical Weld Metal Analysis %
C Mn Si Ni Cr N Nb Ferrite FN
0.06 1.7 0.7 9.7 20.2 0.08 0.72 7

 

Deposition Data
Diameter Current Voltage kg weld metal/ kg electrodes Number of electrodes/kg weld metal Fusion time per electrode at 90% I max Deposition rate 90% I max
2.0 x 300 mm 40-60 A 26 V 0.60 147 39 s 0.6 kg/h
2.5 x 300 mm 50-80 A 29 V 0.59 82 36 s 1.2 kg/h
3.2 x 350 mm 75-115 A 23 V 0.60 44 66 s 1.2 kg/h
4.0 x 350 mm 80-160 A 24 V 0.60 32 66 s 1.7 kg/h
5.0 x 350 mm 140-210 A 25 V 0.60 20 78 s 2.3 kg/h

 

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