How to distinguish between stainless steel screws and steel screws?
1、Suction with a magnet
Those that can be sucked well are steel screws.
2、Use machine test
For example, salt spray test, hardness test to distinguish between stainless steel screws and steel screws.
3, Distinguish the performance
Stainless steel screws are resistant to corrosion and high temperatures, stainless steel screws are not as thermally conductive as steel screws.