Oxford Alloy ER347 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

Oxford Alloys 347.045X33 Stainless Steel Welding Wire, Diameter: .045 Inch, Package: 33 lb Spool, AWS Class: AWS 5.9: ER347, Tensile Strength: 89900 psi, Yield Strength: 65250 psi, Elongation in 2" (%): 41% (As Welded), Welding Process: MIG (GMAW And SAW)/TIG/SUB-ARC Wire, Weld Metal Composition: 0.08% Carbon (C), 1-2.5% Manganese (Mn), 0.3-0.65% Silicon (Si), 19-21.5% Chromium (Cr), 9-11% Nickel (Ni), 0.75% Molybdenum (Mo), 0.03% Sulphur (S), 0.03% Phosphorus (P), 0.75% Copper (Cu), 10XC min/1.0% max Tantalum (Cb+Ta)