Stainless steel screws advertising in our daily lives mortal mainly used to install some outdoor billboards, and many other factors profiles, structure, size, location of billboards is an important factor in the decision to use what kind of profiles installed stainless steel screws advertising, which Why stainless steel screws profiles have what type? Here let us take a look at it.
Its stainless steel screws advertising there are three main sections:
First, the austenitic stainless
The most basic element of austenitic stainless steel alloys of chromium and nickel, typically containing grade of about 18% chromium, nickel-chromium containing about 8% of a nickel austenitic stainless steel, commonly referred to as 18-8 stainless steel. The ratio of the elements chromium and nickel to ensure that the structure of the steel is substantially stable austenite.
Second, ferritic stainless steel
430 ordinary chrome steel, and its corrosion resistance and heat resistance than Type 410 is good, there are magnetic, but it can not be heat strengthened, while suitable for higher corrosion resistance and heat resistance, and strength requirements of the general stainless steel screws.
Third, martensitic stainless steel
410 and 416 can be heat strengthened, hardness 35 ~ 45HRC, good machining performance for general purpose corrosion resistant stainless steel screws.
Fourth, some of the principles of selection of stainless steel screws
Choose stainless steel mainly from the following five aspects to consider:
1, the material of the stainless steel screw mechanical properties, specifically strength requirements;
2, the workers do conditions on the material aspects of corrosion resistance requirements;
3, the working temperature of the material heat resistance (high temperature strength, oxidation resistance) requirements;
4, the production process of the material processing performance requirements;
5, other aspects, such as weight, price, purchase, and many other factors must be considered