Metal snap domes (metal dome) material is generally used from Japan stainless steel 301. Normally we have two plated: nickel and gold-plated.
Why do we do the plated on the snap domes? The main role is to reduce resistance and increase the conduction properties of the product . The contact resistance from small to large is: gold plated, Nickel plated, stainless steel. Although the plating can reduce the resistance, it is also a corresponding increase in the cost, especially the price of the gold-plated snap domes.
In general, the resistance of the stainless steel material is less than 100 ohms , nickel plated is less than 10 ohms. and gold-plated is less than 1 ohm.
What kind of the metal snap domes plated is your best choice is based on your end-product required. Whatever item of metal snap dome we also have, please contact our sales.