The power source in a particular welding setup generates 4000 W that can be transferred to the work surface with a heat transfer factor = 0.9. The metal to be welded is low carbon steel, whose melting temperature, is 1800 K. The melting factor in the operation is 0.6. A continuous fillet weld is to be made with a cross-sectional area = 20 mm2. Determine the travel speed at which the welding operation can be accomplished? (K = 3.33 *10-6)

• A. 59.5mm/sec
• B. 10.49mm/se
• C. 3.65mm/sec
• D. 4.56mm/sec