Frequently asked questions about Sandvik Santronic™ pre-coated strip
Below are the most frequently asked questions about Sandvik Santronic™ pre-coated strip steel.
- What type of applications is Sandvik Santronic™ pre-coated strip suited for?
- What strip dimensions can be supplied?
- What coating materials are available?
- What properties can be enhanced?
- What are the coating limitations of Sandvik Santronic™ pre-coated strip?
- What is the dog-bone effect?
Sandvik Santronic™ pre-coated strip is especially suited for electric-load carrying strip applications where the mechanical strength of steel and the beneficial properties of surface technology conductive coatings are combined and utilized in an optimal way. This is, for example, true for applications such as tactile domes, contact springs and various EMC shielding components (fingerstocks).
Strip thickness range is 0.05-0.8 mm (0.00197-0.0315 in.), depending somewhat on the steel grade. Width range can be supplied up to 800 mm (31.5 in.).
Standard coating materials are nickel (Ni) and tin (Sn).
With appropriate choice surface coating, properties such as corrosion resistance, surface conductivity, weldability and wear resistance can be enhanced.
Thicker coatings than 2 µm are difficult to achieve.
The dog-bone effect (edge build-up) refers to an electrochemical phenomenon that results in higher current densities on the edges of a substrate than in the middle. This creates a coating profile, which is thicker on the edges than in the middle (dog-bone shape).