Development of Ferritic Stainless Steel Welding Wire for Automotive Exhaust Systems.

Influence of silicon and niobium on weldabilities of ferritic stainless steel welding wire have been investigated. The results are as follows. (1) At MIG and MAG welding, the weld cracking proof characteristic was improved by the addition of 1.0% silicon to weld wire and decreasing the niobium content of weld wire to 0.2%. (2) The developed weld wire with copper coating is excellent in the flatness of weld bead and the corrosion resistance.