Boilermakers work with a variety of materials in their profession. Some of the materials they commonly work with include: 1. Steel: Boilermakers often work with steel to fabricate and assemble boilers, pressure vessels, and other industrial equipment. They are skilled in welding, cutting, and shaping steel components. 2. Alloys: Boilermakers also work with various alloys, such as stainless steel, aluminum, and copper alloys. These materials are used in the construction of specialized equipment that requires corrosion resistance or specific mechanical properties. 3. Pipes and Tubes: Boilermakers frequently handle pipes and tubes made of different materials, including steel, stainless steel, and non-ferrous metals. They install and repair piping systems, ensuring proper alignment, welding, and sealing. 4. Sheet Metal: Boilermakers work with sheet metal to create components for boilers, tanks, and other structures. They use cutting, bending, and welding techniques to shape and assemble sheet metal parts. 5. Refractory Materials: Boilermakers deal with refractory materials, such as firebricks and insulation, which are used to line the inside of boilers and furnaces. They install and repair these materials to ensure proper insulation and heat resistance. 6. Gaskets and Seals: Boilermakers work with gaskets and seals made of various materials, including rubber, graphite, and metal. These components are used to create tight seals and prevent leakage in pressure vessels and piping systems. 7. Rivets and Fasteners: Boilermakers use rivets, bolts, and other fasteners to join metal components together. They are skilled in drilling, tapping, and riveting techniques to ensure structural integrity. 8. Insulation Materials: Boilermakers install insulation materials, such as fiberglass, mineral wool, and foam, to provide thermal insulation and energy efficiency in boilers and other equipment. 9. Composite Materials: In some cases, boilermakers may work with composite materials, such as carbon fiber reinforced polymers (CFRP), which offer high strength-to-weight ratios. These materials are used in specialized applications where weight reduction is critical. It's important to note that the specific materials used by boilermakers may vary depending on the industry and the type of equipment they are working on.