OK 68.81

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Mô tả

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.

 

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: CE EN 13479, Seproz UNA 272580

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

 

Welding Current: DC+, AC
Ferrite Content: FN 30 – 50
Alloy Type: Stainless duplex
Coating Type: Acid Rutile

 

Typical Tensile Properties
Condition Yield Strength Tensile Strength Elongation
AWS
As welded 610 MPa 790 MPa 25 %

 

Typical Charpy V-Notch Properties
Condition Testing Temperature Impact Value
AWS
As welded 20 °C 30 J

 

Typical Weld Metal Analysis %
C Mn Si Ni Cr Mo N Ferrite FN
0.13 0.9 0.7 10.2 28.9 0.04 0.09 40

 

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 22 V 0.64 123 41 s 0.7 kg/h
2.5 x 300 mm 50-85 A 24 V 0.64 78 48 s 0.9 kg/h
3.2 x 350 mm 60-125 A 25 V 0.62 42 65 s 1.3 kg/h
4.0 x 350 mm 80-175 A 26 V 0.62 26 66 s 2.0 kg/h
5.0 x 350 mm 150-240 A 28 V 0.65 17 68 s 3.2 kg/h

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