Yes, you can use a welding torch to weld steel coils together. However, it's important to choose the right type of welding process suitable for the specific steel grade and the desired strength of the joint. Common methods include gas metal arc welding (GMAW), shielded metal arc welding (SMAW), and flux-cored arc welding (FCAW). Ensure you follow safety protocols, use appropriate protective gear, and have a good understanding of the welding process to achieve strong, reliable welds.