The industries that use DD12 and DX52 can vary depending on their specific physical and mechanical attributes. However, both materials are commonly used in the manufacturing and construction industries. DD12 is often used for manufacturing of structural parts, while DX52 is commonly used for construction and engineering applications. Additionally, both materials can be used in automotive manufacturing, as they have good formability and weldability properties. Other industries that may use DD12 and DX52 include shipbuilding, appliance manufacturing, and general fabrication.