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OK 73.15

OK 73.15 is a basic electrode with very good welding characteristics. Its exceptional weldability is ideal for multiple applications including Pipe. The electrode has a classification of AWS 8018-C3 H4R and gives a weld metal alloyed with about 0.9% Ni. It fulfils impact requirements down to - 50 °C. The low moisture absorption coating gives less than 4 ml diffusible hydrogen / 100 g welded metal. Weld metal recovery is above 120 % for the main diameters. OK 73.15 is HIC test compliant as per NACE TM0284 & SSC test compliant as per NACE TM0177.

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Highlights

Process

Specifications
Classifications SFA/AWS A5.5M : E5518-C3
SFA/AWS A5.5 : E8018-C3 H4R
EN ISO 2560-A : E 46 5 1Ni B 4 2 H5
Approvals CE : EN 13479
DNV-GL : 4 Y46H5
UKCA : EN 13479
Welding Current DC+(-)
Diffusible Hydrogen < 4.0 ml/100g
Alloy Type Low alloyed (0.9 % Ni)
Coating Type Basic covering
Tensile_Properties
Testing Condition Yield Strength Tensile Strength Elongation
AWS
As Welded 500 MPa 600 MPa 29 %
PWHT
1 hour(s) 620 °C
500 MPa 580 MPa 27 %
PWHT
6 hour(s) 620 °C
490 MPa 580 MPa 27 %
PWHT
10 hour(s) 620 °C
500 MPa 590 MPa 27 %
Charpy Testing
Testing Condition Testing Temp Impact Value
AWS
As Welded -40 °C 90 J
PWHT
10 hour(s) 620 °C
-40 °C 70 J
As Welded -50 °C 70 J
PWHT
1 hour(s) 620 °C
-50 °C 70 J
PWHT
10 hour(s) 620 °C
-50 °C 50 J
PWHT
6 hour(s) 620 °C
-50 °C 60 J
As Welded -60 °C 60 J
PWHT
6 hour(s) 620 °C
-60 °C 50 J
Typical Weld Metal Analysis %
C Mn Si S P Ni Cr Mo V
0.07 1.10 0.35 0.014 0.009 0.90 0.08 0.15 0.01
Deposition Data
Diameter Amps Volts Efficiency (Per) Fusion time per electrode at 90Per I max Deposition rate at 90Per
2.5 x 350 mm 65-110 A 20 V 60 % 57 sec 0.9 kg/h
3.2 x 350 mm 85-150 A 22 V 63 % 63 sec 1.3 kg/h
3.2 x 450 mm 85-150 A 22 V 63 % 64 sec 1.3 kg/h
4.0 x 350 mm 115-190 A 25 V 65 % 93 sec 1.8 kg/h
4.0 x 450 mm 115-190 A 25 V 66 % 95 sec 1.8 kg/h
5.0 x 450 mm 155-280 A 28 V 66 % 93 sec 2.7 kg/h
Description Product Number
OK 73.15 3.2x450mm 1/2 VP 73153241G0
OK 73.15 4.0x350mm 1/2 VP 73154031G0
OK 73.15 2.5x350mm 1/2 VP 73152531G0
OK 73.15 3.2x350mm 1/2 VP 73153231G0
OK 73.15 5.0x450mm 3/4 VP 73155041V0
OK 73.15 4.0x450mm 3/4 VP 73154041V0

Welding Invented

When our founder Oscar Kjellberg developed the world's first coated welding electrode in 1904, he launched a company whose innovation and uncompromising standards have helped create the history of welding itself. This legacy continues in the quality, performance, and continuous development of the covered electrodes we make today.

Factory Fresh Low Alloy Electrodes, Straight from the Pack

ESAB's VacPac™ packaging is hermetically sealed and vacuum-packed to protect low alloy electrodes from moisture pick up and re-absorption from the air. Electrodes can be used straight from the package without the need to re-bake them or you can store them temporarily in holding ovens and quivers. Get fresh, dry low alloy covered electrodes every time with ESAB.

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