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Autogeneous gas tungsten arc welding of a steel plate is carried out with welding current of 500 A. Voltage of 20 V and weld speed of 20 mm/ min. Consider the heat transfer efficiency from the arc to the weld pool as 90%. The heat input per unit length (in kJ/mm) is
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- 27
- 35
- 45
- 55
Correct Option: A
Current = 500 A
Voltage = 20 V
V = 20 mm/min
ηHT = 0.9
| Heat Input/length = ηHT | = | ||
| N | 20/60 |
= 27 kJ/mm
