What happened to the 316 stainless steel socket head screw that was not rusted for half a year?

We received a customer call today, saying that the 316 stainless steel socket head screw he produced in other places have been rusted for half a year.

What?? Does 316 stainless steel socket head screw not perform well in many stainless steel materials? How can it be rusted in less than half a year? The customer expressed serious doubts that he had been fooled by the previous manufacturer and replaced other stainless steel materials with 316.

Wait a minute, don’t worry, let Shi Shi Tong screw manufacturers first understand the situation, under normal circumstances, stainless steel screws will also rust, stainless steel screws are only less likely to rust than ordinary screws, in some specific use environments It will still rust, but the screws used in certain environments will also use other special screws, so stainless steel screws have a good surface for long-term rust resistance, and 316 stainless steel socket head screw are performance in stainless steel profiles. Ok, the rust resistance is naturally stronger.

Still 316 stainless steel socket head screw are not rusted for half a year, what is going on? original. The 316 stainless steel screws used by the customers are welded screws. The answer is obvious. In addition to the purchase of inferior 316 stainless steel and harsh environment, there are two reasons:

1.316 stainless steel screws after welding, there will be some chemical defects in the welding area, such as undercut, pores, cracks, fusion incomplete. Not welded and so on.

2.316 stainless steel screws after welding, there will be some chemical defects in the welding area, such as coarse grain, grain boundary chromium deficiency, segregation and so on. The potential difference formed with the corrosive substance produces electrochemical corrosion.

Therefore, for the above reasons, the 316 stainless steel welding screw area is more prone to rust, and as for other 316 stainless steel screw fasteners, you don’t have to worry about it. In addition, 304.316 sold by Shi Shi Tong screw fasteners. Stainless steel screws are used to ensure the use of authentic stainless steel wire, you can rest assured to buy.

If you want to customized 316 stainless steel socket head screw please send an email: annie.li@szsst88.com