SPW Product Catalogue 2019

ELECTRODES LOW HYDROGEN
KOBE ELECTRODE LB-52-18
For welding of 490N/mm2 high tensile steel
Classification
JIS Z3212 D5016
AWS A5.1 E7018
Applications
Shielded metal arc welding of mild and 490N/mm2 high tensile steels of ships, bridges, buildings and pressure vessels.
Characteristics on Usage
LB-52-18 is an iron powder low hydrogen type covered electrode for all-position welding. The mechanical properties of the weld metal are the same as LB-52.
Its usability by direct current is the best among low hydrogen type electrodes.
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Notes on Usage:
(1) Dry the electrodes at 300-350oC for 30-60 minutes before use.
(2) Take the backstep method or strike the arc on a small steel plate prepared for this particular process purpose to prevent blowholes at the arc starting.
(3) Keep the arc as short as possible.
Typical Chemical Composition of Weld Metal (%)
C Si Mn P S
0.07 0.59 0.97 0.013 0.007
Typical Mechanical Properties Weld Metal
YP T.S. EL. IV
N/mm2 (lbs/in2) N/mm2 (lbs/in2) (%) J(kgf-m)
500 (51) 560 (57) 31 210 (21)
Sizes available and recommended currents (DC - EP or AC)
Dia (mm) 2.6 3.2 4.0 5.0 6.0
L (mm) 350 400 450 450 450
Part Number: 100011 100012 100013 100014 100015
AMP F 65~95 90~130 130~190 190~250 250~320
V & OH 60~90 80~120 110~170 165~210 -
KOBE ELECTRODE LB-52U
For one-side welding.
Classification
JIS Z3211 D4316
AWS A5.1 E7016
Applications
One-sided shielded metal arc welding of pipes and general butt joints of mild steel and 490N/mm2 high tensile steel.
Characteristics on Usage
LB-52U is a low hydrogen type covered electrode for exclusive use for one-side welding of pipes and general structures.
Its arc stability is extremely good to perform one-side welding with relatively low currents.
LB-52U provides good slag removability and smooth weld beads.
Notes on Usage:
(1) Dry the electrodes at 300-350oC for 30-60 minutes before use.
(2 ) Reverse side bead with good appearance is obtained with proper current and optimum root gap.
(3) Cut off the arc after setting the crater to the side wall of the groove to avoid crater cracks.
(4) Strike the arc on a small steel plate prepared for this purpose or on the side wall of the groove to prevent blowholes at the arc starting.
(5) Keep the arc as short as possible.
Typical Chemical Composition of Weld Metal (%)
C Si Mn P S
0.08 0.64 0.86 0.012 0.008
CONSUMABLES
Typical Mechanical Properties Weld Metal
YP T.S. EL. IV
N/mm2 (lbs/in2) N/mm2 (lbs/in2) (%) J (ft.lb)
480 (49) 560 (57) 31 130 (13)
Sizes available and recommended currents (AC, DC - EP or DC - EN)
Dia (mm) 2.6 3.2 4.0 5.0
L (mm) 350 400 400 400
Part Number: 100053 100054 100055 100056
AMP OSW 30-80 60-110 90-140 130-180
F 60-90 90-130 130-180 180-240
V & OH 50-80 80-120 110-170 150-200
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SPW GROUP PTY LTD