©
COPYRIGHT 2000 THE ESAB GROUP, INC. LESSON
IX 5.
Electrode Cost - $.80/lb (from supplier).
6. Deposition
Efficiency - 86% (.86) From Table in Figure 10. 7.
Gas Flow Rate - 45 cubic feet per hour.
From Figure 7. 8.
Gas Cost - $.03/cubic foot (from supplier).
9. Cost
of Power - $.045/kWh. 10.
Wt/Ft of Weld - From Figure 15B = .846
lbs/ft. These
values are shown inserted into the formulas on the Weld Metal Cost Worksheet in
Figure 16. 9.6 COMPARING
WELD METAL COSTS It
is interesting to note that the amount of weld metal deposited in Example 1 and
Example 2 is almost
the same, while the total cost of depositing the weld metal is three times higher
in Example 1 as
shown below. This is because the flux cored process has a higher deposition
rate, efficiency and operating factor
and also allows a tighter joint due to the deep penetrating
characteristics of the process.
Example 1 - 1,280 ft x .814 lbs/ft
= 1,041.9 lbs at $13,939 Example
2 - 1,280 ft x .846 lbs/ft = 1,082.9 lbs at $ 4,352
9.6.0.1 When
comparing welding processes, all efforts should be made to assure that you
use the proper welding current for
the electrode or wire in the position in which the weld must
be made. As an example, consider
depositing a given size fillet weld in the vertical-up posi-
45° 22.5°
22.5° 1/
16" 7/8"
5/8" 1/2"
1/8" A
B C
B B
C C
1" 1/2"
1/2" 1/16"
lbs./ft.
A = .265
B = .425
C = .124
TOTAL WEIGHT/FT.
.814 lbs lbs./ft.
B = .176 x 4 =
.704 C
= .071 x 2 = .142
TOTAL WEIGHT/FT.
.846 lbs ESTIMATING
WELD METAL WEIGHT FIGURE
15 A
B
