116 Operation
of Coreweld Electrodes A
constant voltage power source operating DCEP (Electrode Positive) is needed for
proper operation. A variety
of gas mixtures may be used for external shielding of Coreweld 70. Mixtures of
75% Argon/25% CO2, or
92% Argon/8% CO2 provide very good efficiencies
and smooth operating characteristics. A mixture of
50% Argon/50% CO2
may be used, but it should be noted that as the percentage of Argon decreases,
spatter and fume levels increase and
a change in mechanical properties may occur. A gas flow rate in the
range of 30-40 CFH is recommended. Electrical
stickout (ESO) is the distance measured from the contact
tip to the work piece. The ESO for .035
- 1/16" (0.9 - 1.6mm) electrodes is 3/8 - 3/4" (9.5 - 19mm). The ESO
for 5/64 - 3/32" (2.0 - 2.4mm) electrodes
is 3/4 - 1 1/4" (19 - 32mm). Suggested
Welding Parameters Coreweld
Wires DIAMETER RANGE
STICKOUT OPTIMUM
(Flat) .035" (0.9mm)
23-29 V, 130-260 A 3/8
- 3/4" (9.5 - 19mm) 25
V, 200 A .045" (1.2mm)
24-32 V, 150-350 A 3/8
- 3/4" (9.5 - 19mm) 26
V, 250 A .052" (1.4mm)
26-32 V, 200-400 A 3/8
- 3/4" (9.5 - 19mm) 28
V, 300 A 1/16" (1.6mm)
26-34 V, 300-500 A 3/8
- 3/4" (9.5 - 19mm) 30
V, 400 A 5/64" (2.0mm)
27-33 V, 350-550 A 3/4
- 1 1/4" (19 - 32mm) 30 V, 450
A 3/32" (2.4mm)
28-34 V, 400-580 A 3/4
- 1 1/4" (19 - 32mm) 32 V, 500
A
