Chalco aluminum’s structure transition joints aluminum steel bimetal are commonly used to make a welded and maintance free connection between alloyed aluminum components and steel structures in the shipbuilding, railway and automotive industry.
The major shortcomings of rivets and bolts are that they require holes to be drilled, need special insulators and require regular assembly inspection. Any removal of material, such as drilling holes, also weakens the metal.

Aluminum clad steel bimetal--Structure transtion joints are an indisputably better option because they eliminate crevices and have shown to limit crevice corrosion. aluminum clad steel bimetal - Transition joints require no extra hardware, which allows engineers to stream-lin, their designs and shave off extra weight..

Types	Temper	Features
CA100	No transition layer	higher cost performance
CA101	Thin transition layer	High bonding strength
CA200	Thick transition layer	Ultra-high bond strength