Submerged Arc, a basic flux which features industry proven results in multiple pass applications. Recommended for welding with solid mild steel and low alloy electrodes, as well as Lincoln’s LAC series of low alloy flux-cored electrodes. Good deep groove slag removal. Excellent choice for single arc AC submerged arc welding. Applications are tandem arc applications for offshore fabrication, jobs requiring 480 MPa (70 ksi) tensile strength after stress relief when used with L-56, L-S3 or LA-71.