In-Shop Fabrication OR On-Site Installation with our fleet of Mobile Welding Trucks, we are available 24/7. Give Jay a call today at 1-905-750-0003 ALLOY FUSION INC. (formerly: Mobile Custom Welding (MCW) LTD Serving the Greater Toronto Area (GTA) and surrounding areas. We are keen to earn your business for another 16 years. We have two Company divisions: One which is focused on Structural Steel Installations for tenders up to $450,000. One for Mobile & Custom Welding of most other Alloy?s. -Hardened Steel resurfacing & Heavy Equipment Welding -Factory Production Machinery Repair & Maintenance -Stainless Steel Welding -Aluminum Welding -Mild Steel Welding "Willing to go above & beyond to offer you a "turn-key" Service/Project, as your 100% satisfaction is our ultimate goal!"