Er70S-2 Is Deoxidized Wire Which Is Recommended For Tig Welding On All Grades Of Steel Producing X-Ray Quality Welds. Er70S-2 Is Used Primarily For Single-Pass Welding Of Killed, Semi-Killed And Rimmed Steels, But May Also Be Used For Some Multi-Pass Applications And Ideal For Pipe Welding. Er70S-2 Can Be Used For Welding Steels That Have A Rusty Or Dirty Surface. Typical Specifications For These Steels Are Astm A36, A285-C, A515-55 And A516-70.