3 52
VOLTS 1200 Amperes 12.5
ipm WELDING VOLTAGE
SQUARE GROOVE BUTT
JOINT 1/2-in. Plate CORRECT
LOW HIGH
Result: Welds are too wide; reinforcement
too low. Excessive amounts of flux
were fused. Result:
Excessive reinforcement in both
welds. Bottom weld is “pear”
shaped and too narrow for its depth;
internal crack caused by center
cooling last. Result: Both welds
satisfactory in all respects.
45o SINGLE-VEE
GROOVE BUTT JOINT 1-1/2-in.
Plate 22 VOLTS
500 Amperes 30 ipm
29 VOLTS 500
Amperes 30 ipm 38
VOLTS 500 Amperes
30 ipm 28 VOLTS
1200 Amperes 12.5
ipm 40 VOLTS 1200
Amperes 12.5 ipm FIG.
28 - Effect of Varying the Welding Voltage
