Galvanized screws have a mechanical performance rating […]
Galvanized screws have a mechanical performance rating of up to 8.8, while stainless steel screws can only be up to -70, such as A2-70, A4-70, which is equivalent to 7 and lower than galvanized screws.
Therefore, the use of galvanized screws is wider than that of stainless steel screws, and the amount is also higher than that of stainless steel screws.
However, it should be noted that the galvanized screw is not a complete replacement for the stainless steel screw, and the corrosion resistance is longer than the stainless steel screw. Therefore, it is still necessary to select the appropriate material according to the occasion of use.
For the difference between stainless steel screws, galvanized and nickel-plated screws, you may encounter the following problems.
Question: Why do screws generally require nickel plating of 3-5 microns, while galvanizing requires a film thickness of 5-8 microns? Will it affect the pass regulation? What is the contrast of salt spray? Can you answer the details in detail?
Answer 1: The thickness of the coating is not specified, and it is determined according to customer requirements or salt spray requirements. The thicker coating will of course affect the pass-stop, the key is to control the thread tolerance. In terms of salt spray, zinc plating is more resistant to corrosion than nickel plating.
Answer 2: The thickness of the plating and the type of plating depend on the conditions and environment used by the customer. The criteria for determining the thickness and corrosion resistance are determined by the buyer and the seller.