The screws cast by stainless steel screw manufacturers are actually a very common material in our daily life, because their materials are very convenient for today's life, so they are suitable for many occasions and environments. Although the material of stainless steel screws is made of stainless steel, there are still many different materials added, and with the continuous progress of technology, there are also classifications in the entire stainless steel screw industry. So, let's take a look at which national standard materials and models are there?
Firstly, austenitic stainless steel has a relatively high level of corrosion and heat resistance for stainless steel screws. If encountering environments with corrosive gases and liquids, or environments with relatively high overall temperatures, choosing this type of stainless steel screw is very suitable.
Stainless steel screws usually refer to steel that has the ability to resist corrosion from air, water, acid, alkali salt, or other media. According to the different alloy compositions, emphasis is placed on rust resistance and acid resistance. Although some steels have rust resistance, they may not necessarily be acid resistant, while acid resistant steels typically have rust resistance. Austenitic stainless steel is mainly used for the production of fasteners, and in people's daily life, stainless steel is often referred to as austenitic stainless steel. The stainless steel fasteners we use, and the stainless steel screw manufacturers mainly use austenitic 302, 304, 316 and "low nickel" 201 as raw materials.
There is also a type of stainless steel screw called a martensitic stainless steel material nut, which is actually subdivided in martensite. Among them, the 420 type stainless steel screw contains sulfur material, with high mechanical properties and can be strengthened through heat treatment. Therefore, its hardness and strength level are relatively high, which can be suitable for many demanding occasions and environmental needs. And the other two types of martensitic stainless steel, namely 410 type and 416 type, have similar grip strength to ferritic stainless steel screws, but have relatively higher flexibility and are relatively easy to cut stainless steel. Therefore, if you want to further plastic or further process, you can choose stainless steel screws made of this material.
In fact, Lin Lin can calculate that there are more than ten types of materials for stainless steel screws, especially 11 types of austenitic stainless steel. Among austenitic stainless steel screws, 304 and 316 types are also suitable for Z, so Z is widely used. Overall, there is not much difference between 304 and 316 types. However, in terms of characteristics, 304 type is suitable for stainless steel products processed by hot heading technology. Therefore, in terms of model and size, it can be larger or longer than ordinary nuts, suitable for some special occasions and environmental needs, and can be more versatile in terms of model; The 316 type contains the alloying element Mo, which is also a major difference between the 316 type and other models. The presence of such Mo element makes the 316 stainless steel screws have stronger corrosion resistance.