Determine the heat input:

If the arc voltage is equal to  20, the current is 300 amps and the welding speed is 2.5 mm/sec Determine the heat input for unit length.

Solution

By using equation

H = VI /S= (20 × 300) /2.5= 2,400 J/mm

The heat input per unit length of the weld shall be 2,400 joules per mm or 2.4 kilo joules (kJ) per mm.

The major arc welding procedure, which are used extensively by the industry, are as following :

• Shielded Metal Arc Welding,
• Gas Tungsten Arc Welding,
• Submerged Arc Welding,
• Gas Metal Arc Welding, and
• Plasma Arc Welding.