What is the required baking temperature for electrodes lower than E100XX prior to welding ASTM A514 or A517 steels?

The appropriate baking temperature for electrodes lower than E100XX prior to welding ASTM A514 or A517 steels is indeed in the range of 700 degrees F to 800 degrees F. This temperature range is specifically set to ensure that the electrodes are preheated adequately before use, which is crucial in preventing moisture absorption that can lead to hydrogen-induced cracking.

Baking electrodes in this temperature range helps drive off any moisture and volatile compounds present, thereby improving the quality of the weld and enhancing the mechanical properties of the welded joint. It is important to adhere to these baking guidelines to maintain the integrity of the welded structure, especially when working with high-strength steels like ASTM A514 or A517, which are susceptible to cracking if not properly handled.

The other options either do not meet the required temperature range or incorrectly state that no baking is needed, which does not follow best practices for welding high-strength materials.