PRODUCT INFORMATION Category: Stainless Steel Wire Alloy: WW347SI Class: ER347SI Description: ER347SI is a columbium stabilized stainless steel welding wire used to weld Types 321 and 347. Addition of columbium reduces the possibility of chromium carbide precipitation and consequent intergranular corrosion. This grade is recommended if the weld metal is to be subjected to high temperatures above 750F. Chemical Composition C 0.08 max Cr 19.0-21.5 Ni 9.0-11.0 Mn 1.0-2.5 Si 0.65-1.0 P 0.03 max S 0.03 max Mo 0.75 max Cu 0.75 max Nb 10 x C min - 1.0 max