Lincoln Electric's ER70S-2 TIG welding rod is recommended for TIG welding on all grades of steel and produces x-ray-quality welds over most surface conditions. Classified as ER70S-2, it has a 1/8-inch diameter and contains zirconium, titanium, and aluminum alongside silicon and manganese. Ink-jet identification runs along the full electrode length, and the rods are supplied in a 50 lb carton.