Which rod is commonly referred to as a low hydrogen rod?

The designation E-7018 refers to a low hydrogen electrode used primarily for welding in various applications, especially in structural steel work. Low hydrogen rods are designed to reduce the risk of hydrogen-induced cracking in welds. This makes E-7018 an ideal choice for welding high strength steels and other materials that are susceptible to hydrogen embrittlement.

In welding contexts, the phrase "low hydrogen" indicates that the rod produces minimal hydrogen in the weld pool during the welding process. The low hydrogen content is essential in enhancing weld quality and durability.

Other electrodes, like E-6010 or E-7016, do not share the same low hydrogen properties; they are designed for different welding applications and typically involve greater hydrogen levels during the welding processes. E-308L is a stainless steel electrode, which also has its distinct characteristics and applications that do not fall under the category of low hydrogen electrodes. The unique suitability of E-7018 as a low hydrogen rod is crucial for ensuring strong, crack-resistant welds where the integrity of the structure is paramount.