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 -60C. 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
VdTV 01529
CEEN 13479
C0,05
Si0,3
Mn1,0
Ni2,4
P0,02
S0,02
Cr0,1
Mo0,05
V0,03
Nb0,02
Cu0,1
Al0,03
Sn0,01
Ti0,03
Pb0,02
As0,03
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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