Question

A 900mm long steel plate is welded by manual metal arc welding process using welding current of

150A arc voltage 20V and welding speed of 300m/min, if the process efficiency is 0.8 and surface

resistance is 36 µ , calculate heat input.​

Answer 1

= η

VI

=

0.8 × 20 × 150

= 480 J/mm.

V 300/60

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