Repair Manual

40
GENERAL
40 - 9
WELDING TYPES AND PARAMETERS
At the reparation of the welded body elements, three welding categories may be used:
protection gas welding (CO2), electric spot welding and filling materials welding
(autogenous).
At the autogenous welding, it is recommended that flame must be slightly inclined so
that arch can be seen and the flame extremity to be maintained at aprox. 5 mm from the
part to be welded.
1. Spot welding resistive parameters for steel plates with carbon content C < 0,15 %.
Plate thickness (mm) Welding current (KA) Welding time(per) Tightening force (daNm)
0,5 6,5 5 130
0,8 8,0 8 200
1,0 9,5 10 250
1,25 10,5 10 295
1,5 10,0 14 310
2,0 12,0 16 350
NOTE : 1 period = 1/50 part of a second
2.Welding parameters for the welding in protector gas for carbon steel plates or lowalloyed
steel.
Horizontal welding position ( fig. 1 )
Plate thickness (mm) 0,6 1,0 1,5 2,0
Electrode diameter (mm) 0,6 0,8 0,8 1,0 0,8 1,0 0,8 1,0
Wel ding wire speed (m/min) 2,5 1,9 3,2 2,4 4,4 3,8 5,7 4,4
Wel ding current (A) 35 35 55 80 80 120 100 130
Wel ding speed (m/min) 0,25 0,25 0,35 0,33 0,33 0,50 0,45 0,45
Wel ding voltage (V) 17 17 18 18 19 19 20 20
Protection gas flow(l/min) 12 - 17
Electron free length (mm ) 6 - 12
( fig.1 )
( fig.2 )
cross linked
plates welding
end to
end welding
corner
welding
0-1,5mm
0-1,5mm
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