What AWS electrode specification number represents NR 232?

The AWS electrode specification number for NR 232 is represented by E71T-8. This designation is specifically designed for flux-cored electrodes suitable for welding high-strength steels. E71T-8 indicates a tubular electrode that utilizes a flux to protect the weld pool from contamination, resulting in high-quality welds that can handle various service conditions.

It's important to understand the notation: "E" stands for electrode, and the following numbers indicate the tensile strength of the weld metal (in kilopounds per square inch) and its position and type. In this case, the "71" denotes a minimum tensile strength of 70,000 psi, and the "T-8" classification signifies that it's an all-position welding electrode with additional requirements such as enhanced impact toughness.

Understanding the specifics of these classifications is essential for selecting the correct electrode for a given application, ensuring appropriate mechanical properties and compatibility with base materials.