Question

Two Plates, each of $6mm$ thickness, are to be butt-welded. Consider the following processes and select the correct sequence in increasing order of size of the heat attached zone

1. Arc welding
2. MIG welding
3. Laser beam welding
4. Submerged arc welding

• A. $3-2-4-1$
• B. $3-4-2-1$
• C. $1-4-2-3$
• D. $4-3-2-1$

Answer 1

The correct option is A $3-2-4-1$

Processes with low rate of heat input (slow heating tends to produce high total heat content with the metal, slow cooling rates, and large heat affected zones, fast cooling rates and small heat affected zones)