OK 73.68
SMAW
Type Basic

OK 73.68 is a 2.5% nickel-alloyed LMA electrode suitable for welding of low-alloy steels with impact requirements down to -60°C. The composition of the weld metal is such that good, low temperature impact properties are obtained, even when welding vertically-up. The weld metal of OK 73.68 is also noted for its good corrosion resistance to sea-water and sulphuric acid fumes.
Welding current, A
AC, DC+ OCV 65 V


ClassificationsApprovalsTypical all weld metal compositionTypical properties all weld metal
SFA/AWS A5.5
E8018-C1
EN ISO 2560-A
E 46 6 2Ni B 32 H5
ABS3H5, 3Y400
BV5Y40M H5
DNV5 YH10
GL6Y55H10
LR5Y40H5
PRS4YH10
RS3YHH
SeprosUNA 409819
VdTÜV 01529
CEEN 13479
C0,05
Si0,3
Mn1,0
Ni2,4
P³0,02
S³0,02
Cr³0,1
Mo³0,05
V³0,03
Nb³0,02
Cu³0,1
Al³0,03
Sn³0,01
Ti³0,03
Pb³0,02
As³0,03
Redrying temperature, °C
350
Redrying time, hours
2
Recovery
120%
Yield stress, MPa
520
Tensile strength, MPa
610
Elongation, %
26
Elongation, %
26
Charpy V
Test temps, °CImpact values, J
-55110
-59105
-60105

Diameter, mm2,02,53,24,05,0
Length, mm 300 350 450 450 450
Arc voltage, V 21 23 23 23 27
Welding current, A 55-75 70-110 105-150 140-190 190-270
N. Kg weld metal/kg electrodes 0,62 0,62 0,62 0,65 0,65
B. No. of electrodes/kg weld metal 130,0 70,0 32,0 21,0 13,5
H. Kg weld metal/hour arc time 0,6 0,9 1,4 2,0 2,5
T. Burn-off time, secs/electrode 46 55 81 88 104

 

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