OK 68.81

ESAB

OK 68.81

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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.

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Typical Charpy V-Notch Properties

As Welded
Impact Value 22 ft-lb
Impact Value 30 J
Shielding Gas AWS
Testing Temperature 68 °F
Testing Temperature 20 °C

Typical Tensile Properties

ConditionElongationShielding GasTensile Strength Yield Strength
As Welded25 %AWS790 MPa (115 ksi)610 MPa (88 ksi)

Deposition Data

Current Deposition Rate @ 90% I max Diameter Deposition Efficiency (%) Number of electrodes/kg weld metal Voltage
40-60 A 41 sec - - 2.0 x 300.0 mm (5/64 x 11,8 in.) 0.7 kg/h (1,5 lb/h) 64 % - 123 - 22 V
50-85 A 48 sec - - 2.5 x 300.0 mm (0.098 x 11,8 in.) 0.9 kg/h (2,0 lb/h) 64 % - 78 - 24 V
60-125 A 65 sec - - 3.2 x 350.0 mm (1/8 x 13,8 in.) 1.3 kg/h (2,9 lb/h) 62 % - 42 - 25 V
80-175 A 66 sec - - 4.0 x 350.0 mm (5/32 x 13,8 in.) 2.0 kg/h (4,4 lb/h) 62 % - 26 - 26 V
150-240 A 68 sec - - 5.0 x 350.0 mm (0.197 x 13,8 in.) 3.2 kg/h (7,1 lb/h) 65 % - 17 - 28 V

Classifications

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

Approvals CE EN 13479
Seproz UNA 272580
Approvals are based on factory location. Please contact ESAB for more information.

Consumable Characteristics

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

Typical Weld Metal Analysis %

Typical Weld Metal Analysis %
C Cr Mn Mo N Ni Si Si+Fe
0.13 % 28.9 % 0.9 % 0.04 % 0.09 % 10.2 % 0.7 % 40 %
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Part Numbers and Accessories

Part Numbers : OK 68.81
OK 68.81 2.0x300mm 1/4 VP 68812020L0 FIND A DISTRIBUTOR
OK 68.81 2.5x300mm 1/4 VP 68812520L0
OK 68.81 3.2x350mm 1/2 VP 68813230T0
OK 68.81 4.0x350mm 1/2 VP 68814030G0 FIND A DISTRIBUTOR
OK 68.81 5.0x350mm 1/2 VP 68815030G0 FIND A DISTRIBUTOR
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