Here is a performance comparison between stainless steel 304 and 316 screws:

Stainless Steel 304 Screws: They have good corrosion resistance and can resist general atmospheric corrosion, water corrosion, and the erosion of some weak acid - alkali environments. In daily life and conventional industrial environments, such as indoor decoration and general mechanical manufacturing, they can maintain good performance and are not easy to rust and corrode.
Stainless Steel 316 Screws: They have stronger corrosion resistance, especially higher resistance to chlorides. This is because molybdenum (Mo) is added to stainless steel 316, which makes it perform better in marine environments, chemical environments, and some humid environments with salt content than stainless steel 304. Therefore, it is more suitable for harsh corrosive environments.

Stainless Steel 304 Screws: Their strength can meet the requirements of most conventional applications, with certain tensile strength and yield strength. In general fastening and connection occasions, such as furniture manufacturing and electronic equipment assembly, the strength of stainless steel 304 screws can ensure the reliability of the connection.
Stainless Steel 316 Screws: Their strength is similar to that of stainless steel 304 screws. However, due to their composition and manufacturing process characteristics, in some special cases, such as high - temperature and high - pressure environments, stainless steel 316 screws may show better strength stability. However, in the conventional normal - temperature use environment, the strength difference between the two is not obvious.

Stainless Steel 304 Screws: They can work in a certain high - temperature environment, generally within the temperature range of - 196 ° C to 800 ° C. Within this temperature range, their mechanical properties and corrosion resistance remain relatively stable, but as the temperature rises, their performance will gradually decline.
Stainless Steel 316 Screws: They have better high - temperature resistance and can generally withstand the temperature range of - 196 ° C to 1200 ° C. In high - temperature environments, the oxidation resistance and creep resistance of stainless steel 316 screws are better than those of stainless steel 304 screws. Therefore, they are more suitable for high - temperature industrial fields, such as boilers and steam turbines.

Stainless Steel 304 Screws: They have good machinability and are easy to be processed by cold heading, hot heading, cutting, and other processes. They can be conveniently made into screws of various specifications and shapes. Moreover, during the processing process, problems such as cracking and deformation are not easy to occur, and the production efficiency is high.
Stainless Steel 316 Screws: Their processing difficulty is slightly higher than that of stainless steel 304 screws. Due to the presence of molybdenum, the material has a relatively high hardness, which causes greater wear on the cutting tools during the processing process. It is necessary to use more wear - resistant tools and appropriately adjust the processing parameters. However, with the continuous progress of processing technology, the processing of stainless steel 316 screws has gradually become more feasible and efficient.

Stainless Steel 304 Screws: Usually, stainless steel 304 screws are non - magnetic. However, after cold working, they may produce a certain degree of magnetism. However, this magnetism is relatively weak.
Stainless Steel 316 Screws: Generally, they are also non - magnetic, and their magnetic change is relatively smaller than that of stainless steel 304 screws under various processing conditions, being closer to completely non - magnetic. This characteristic is of great significance in some special application occasions with strict requirements on magnetism, such as electronic instruments and medical equipment.

Stainless Steel 304 Screws: Due to their relatively simple composition, mature production process, and sufficient market supply, their cost is relatively low. They are one of the most widely used stainless - steel screw materials at present.
Stainless Steel 316 Screws: Because they contain alloy components such as molybdenum and have a slightly more difficult production process, their cost is usually higher than that of stainless steel 304 screws. When the requirements for corrosion resistance and high - temperature resistance are not high, people tend to give priority to stainless steel 304 screws to reduce costs.