Low-hydrogen steel electrodes end in what number?

When it comes to low-hydrogen steel electrodes, it is important to recognize that they are specifically designed to minimize the risk of hydrogen-induced cracking in welds. The numbering system for these electrodes is indicative of their composition and intended usage.

Low-hydrogen electrodes typically end with the numbers 5, 6, or 8. Each of these numbers refers to the level of diffusible hydrogen content in the electrodes and relates to the specific alloying elements they contain. The number 5 indicates the lowest hydrogen content commonly found in the electrode, while 6 and 8 are associated with slightly higher levels in accordance with the welding processes they are used for.

Therefore, the option that includes the numbers 5, 6, and 8 accurately reflects the common designations for low-hydrogen electrodes used in welding applications, making it the correct choice for this question. Understanding this classification is crucial for welders to select the appropriate electrode for their projects to ensure high-quality welds and to avoid issues related to hydrogen embrittlement.