WR Cord 309 is primarily intended for welding heat resistant austenitic Cr-Ni steels of similar types such as AISI309 or 309S.
WR-Cord 309 is suitable for joining stainless steel to lower alloy steel , carbon steel, welding the clad side of 18/8 clad steel. It gives 25/12 deposit which has very good corrosion and oxidation resistance in continuous service up to 1100°C / 2012°F.