OK 68.81
SMAW
Type Rutile-acid

OK 68.81 is a high-alloyed electrode which deposits a ferritic-austenitic duplex weld metal with approx. 40% ferrite. Resistant to stress corrosion and 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.
Welding current, A
DC+, AC OCV 60 V


ClassificationsApprovalsTypical all weld metal compositionTypical properties all weld metal
SFA/AWS A5.4
E312-17
EN 1600
E 29 9 R 3 2
Werkstoff Nr.
1.4337
C0,12
Si0,7
Mn0,8
Cr29,0
Ni9,8
Mo<0,5
Cu<0,3
Redrying temperature, °C
350
Redrying time, hours
2
Yield stress, MPa
610
Tensile strength, MPa
790
Elongation, %
22
Elongation, %
22
Ferrite content
FN 50-80
Weld metal hardness, a w
220-240 HV
Machinability
Fair
Charpy V
Test temps, °CImpact values, J
+2030

Diameter, mm2,02,53,24,05,0
Length, mm 300 300 350 350 350
Arc voltage, V 22 24 25 26 28
Welding current, A 40-60 50-85 60-125 80-175 150-240
N. Kg weld metal/kg electrodes 0,64 0,64 0,62 0,62 0,65
B. No. of electrodes/kg weld metal 123,0 78,0 42,0 26,0 16,5
H. Kg weld metal/hour arc time 0,7 0,9 1,3 2,0 3,2
T. Burn-off time, secs/electrode 41 48 65 66 68

 

Vorige pagina