Taseto GFW309 description: TASETO GFW309 is designed higher Ni, Cr and ferrite content than those of Type 308 weld metal. So, GFW309 is used for welding of dissimilar metals such as stainless steel to carbon steel or to low alloy steel, welding first layer of stainless steel side in joining clad steel, and welding first layer of overlay welding on carbon steel or low alloy steel.