Welding economy
Labour cost €/ m
The use of ceramic backing offers significant economic advantages. Take a look at a couple of examples
based on labour cost and time to complete the job.
120
100
Switching from MMA to FCAW with Elga Ceramic Backing
80
In this example we have used an average welding
speed (55 mm/min for MMA and 150 mm/min for
FCAW with backing) and a labour cost of 40€/h
for the welder.
60
40
20
0
Using a 2,5 mm electrode:
MMA
Typical deposition rate is 0,6-0,7 kg/h.
Welding speed 40-70 mm/min.
Characteristic of MMA is a low arcing time factor.
With a 2,5 mm electrode, only a 50-70 mm weld
length can be achieved between electrode changes.
backing
Typical deposition rate is 2,5-3,0 kg/h.
Welding speed 100-200 mm/min.
Characteristic of flux cored wire with backing is a
very high arcing time factor. A 1 meter long root
pass can be welded non-stop.
Flux cored wire and backing (single-sided
welding):
Switching from two-sided welding to singlesided with flux cored wire and ceramic
backing
Two-sided welding
means additional
time for:
FCAW with
Total time comparison
Single-sided welding
with flux cored wire
and backing:
Rewelding of reverse side
100
Gouging & grinding
90
Mounting of backing
80
Root welding
70
60
50
40
30
1. Back-gouging
2. Grinding
3. Rewelding on the reverse side, depending on
the construction.
Substantially higher
productivity since all
”extra work” has been
eliminated.
20
10
0
1
Two-sided welding
246
2
Single-sided welding
with backing