OK 67.70
SMAW
Type Rutile-acid

OK 67.70 is an over-alloyed, stainless steel electrode for use as a buffer layer in welding acid-resistant clad steels and stainless steels to other types of steel. OK 67.70 has outstanding welding properties on both AC and DC. The electrode can be used in all positions except vertical down.
Welding current, A
DC+, AC OCV 55 V


ClassificationsApprovalsTypical all weld metal compositionTypical properties all weld metal
EN 1600
E 23 12 2 L R 3 2
SFA/AWS A5.4
E309MoL-17
Werkstoff Nr.
1.4459
CSA W48
E309LMo-17
ABSSS to C&C/Mn steels
CWBCSA W48
DB30.039.05
DNV309 Mo
LRSS/CMn
RINAE 309Mo
SeprosUNA 409820
VdTV02424
CLEN 1600
BVUP
CEEN 13479
C<0,03
Si0,7
Mn0,9
Cr23,0
Ni13,0
Mo2,8
Cu<0,3
Redrying temperature, C
350
Redrying time, hours
2
Recovery
120
Yield stress, MPa
510
Tensile strength, MPa
610
Elongation, %
32
Elongation, %
32
Ferrite content
FN 12-22
Charpy V
Test temps, CImpact values, J
+2050
-20> 32

Diameter, mm2,02,53,24,05,05,0
Length, mm 300 300 350 350 350 450
Arc voltage, V 26 29 27 31 30 30
Welding current, A 40-60 50-90 60-120 85-180 110-250 110-240
N. Kg weld metal/kg electrodes 0,58 0,57 0,59 0,61 0,59 0,57
B. No. of electrodes/kg weld metal 147 94 47 32 20 15
H. Kg weld metal/hour arc time 0,6 0,9 1,4 2,0 2,7 2,7
T. Burn-off time, secs/electrode 48 45 61 56 64 85

 

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