The metal domes (snap domes) material is general use stainless steel. Stainless steel in various countries, in general, the Japanese SUS301 is used often, but sometimes also use SUS304 material. The difference between these two materials is the chemical composition,304 carbon ratio is higher, but the hardness is note better than 301, so it is generally to use SUS301 to make metal domes (snap dome). Of course, there are some other materials, such as phosphor bronze C5210, One side with silver SUS from Korea.
The proper selection of materials is very improtant for product quality of metal domes(snap domes),if improper selection hardness of the material, it will generally result in “Death KEY” phenomenon (pressing down, then metal dome disappear automatically pops up function).We can’t find out this issue in short-time used and with eyes,we need life test machine and force test machine to test the result.
Our company has a professional production experience, so the choice of materials and incoming detection testing standards will be strictly in accordance with the strict inspection of incoming inspection, so our metal domes(snap domes) have maintained excellent quality.