ER80S-B8 is a solid wire for TIG welding requiring creep strength. This 9% chromium - 1% Molybdenum TIG rod is used to weld 9% chromium - 1% Molybdenum steels (ASTM Section IX, P No 5B, Group 1) such as ASTM A335 Grade P9 or ASTM A213 Grade T9. Tigrod products are embossed on opposite ends with the alloy identification.