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A Tig Book Inside - Chapter IX. Cost Considerations of the GTAW Process

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IX. Cost Considerations of
the GTAW Process
It is important to take into consideration all the facts that
relate to a welding situation when attempting to attach a cost
to a foot of weld. Not only do direct costs such as filler wire,
shielding gas, equipment, and labor have a bearing, but indirect
costs such as overhead and training of personnel have an
affect as well.
Training should be considered in the cost since GTAW is
generally considered a more advanced process and will
require time by the welder to familiarize with the technical and
manipulative aspects of the process.

A cost evaluation of a welding process should include:
1. Labor and overhead cost per foot of weld.
2. Filler wire cost per foot of weld.
3. Gas cost per foot of weld.
4. Power cost per foot of weld.
Computing these figures on a chart or proposal will show the
economics of a particular process.
Standard formulas for cost estimating as presented in this
book (Figure 9.1) are a reasonable measure for computing
data for cost comparison.
The formulas as presented have no “plug-in” numerical values.
The values will vary with each application and each company.

The cost of proper equipment to efficiently accomplish the
job at hand is of great importance. Manual GTAW equipment
in a production setup can run into thousands of dollars. If
there are many repetitive welds, automatic equipment should
be considered, and those costs can run into the tens of
thousands of dollars.

Formulas to Figure Total Welding Cost
Welder Rate in $ Per Hour
1. Labor = __________________________________________ = Cost per ft.
Weld Travel Speed (IPM) x Duty Cycle x 60 min./hr.
12"/ft.
Overhead Rate
2. Overhead = __________________________________________ = Cost per ft.
Weld Travel Speed (IPM) x Duty Cycle x 60 min./hr.
12"/ft.
3. Filler Metal Cost
Foot of Weld

Weight of Deposit x Filler Metal Cost
Deposition Efficiency

Cost of Gas/cu. ft. x Flow Rate (cfh)
4. Gas = ________________________________ = Cost per ft.
Weld Travel Speed (IPM) x 60 min./hr.
12"/ft.
Volts x amps x power cost/kw. hr.
5. Power = ______________________________________________________ = Cost per ft.
Weld Travel Speed (IPM) x Machine Efficiency x 60 min./hr. x 1000
12"/ft.
6. Total = Total of Above Applying Formulas x Total Length of Weld = Total Cost
*The factor 5 will appear in some of the formula examples: This was derived from the ratio of:

60 min./hr.
12"/ft.

Figure 9.1 Formulas for cost considerations.

68

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IX. Cost Considerations of
the GTAW Process
It is important to take into consideration all the facts that
relate to a welding situation when attempting to attach a cost
to a foot of weld. Not only do direct costs such as filler wire,
shielding gas, equipment, and labor have a bearing, but indirect
costs such as overhead and training of personnel have an
affect as well.
Training should be considered in the cost since GTAW is
generally considered a more advanced process and will
require time by the welder to familiarize with the technical and
manipulative aspects of the process.
The cost of proper equipment to efficiently accomplish the
job at hand is of great importance. Manual GTAW equipment
in a production setup can run into thousands of dollars. If
there are many repetitive welds, automatic equipment should
be considered, and those costs can run into the tens of
thousands of dollars.
A cost evaluation of a welding process should include:
1. Labor and overhead cost per foot of weld.
2. Filler wire cost per foot of weld.
3. Gas cost per foot of weld.
4. Power cost per foot of weld.
Computing these figures on a chart or proposal will show the
economics of a particular process.
Standard formulas for cost estimating as presented in this
book (Figure 9.1) are a reasonable measure for computing
data for cost comparison.
The formulas as presented have no “plug-in” numerical values.
The values will vary with each application and each company.
68
Formulas to Figure Total Welding Cost
12"/ft.
12"/ft.
2. Overhead = __________________________________________ = Cost per ft.
Overhead Rate
Weld Travel Speed (IPM) x Duty Cycle x 60 min./hr.
5. Power = ______________________________________________________ = Cost per ft.
Volts x amps x power cost/kw. hr.
Weld Travel Speed (IPM) x Machine Efficiency x 60 min./hr. x 1000
*The factor 5 will appear in some of the formula examples: This was derived from the ratio of:
60 min./hr.
12"/ft.
Welder Rate in $ Per Hour
Weld Travel Speed (IPM) x Duty Cycle x 60 min./hr.
1. Labor = __________________________________________ = Cost per ft.
12"/ft.
3. Filler Metal Cost
Foot of Weld
Weight of Deposit x Filler Metal Cost
Deposition Efficiency
12"/ft.
4. Gas = ________________________________ = Cost per ft.
Cost of Gas/cu. ft. x Flow Rate (cfh)
Weld Travel Speed (IPM) x 60 min./hr.
6. Total = Total of Above Applying Formulas x Total Length of Weld = Total Cost
Figure 9.1 Formulas for cost considerations.
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