The amount of alloying elements in a weld deposited from the filler metal. For example, the deposit from a bare rod containing 0.50% carbon generally will not contain over 0.05% carbon. In this case, the recovery is 10%.If the electrode is coated, the carbon recovery may rise to 50 or loo%, depending on the coating. Low recovery of an alloying element may be due to the low boiling point of the element, its tendency to join with the slag because of its affinity for oxygen, nitrogen or other gases, or may be due to incorrect welding procedure, such as overheating the base metal.