TIG Welding Rod AWS Classification ER90S-B9 Material Low-Alloy Steel Process TIG Welding (GTAW) Overall Diameter 0.0938 in Overall Length 36 in Tensile Strength (As Welded) 90 ksi Yield Strength (Minimum Required) 78 ksi Yield Strength (As Welded) 78 ksi Series ER90S-B9 Weight 10 lb For Material Type Low-Alloy Steel to Low-Alloy Steel For Material Grade ASTM A182 Grade F91 ASTM A213 Grade T91 ASTM A335 Grade P91 Welding Current Designation DCEN