The commonly used screws in daily life are carbon steel screws and stainless steel screws. So what are the differences between the two? Simply put, there are a few points:
① The materials of stainless steel screws and carbon steel screws are different.
② The usage environment of stainless steel screws and carbon steel screws is also different. Stainless steel screws have much higher corrosion resistance and other characteristics compared to carbon steel screws. So in some medical and food equipment, we often see stainless steel material.
③ The price of stainless steel screws is higher than that of carbon steel screws
In addition, each screw can be divided into multiple standard grades; In order to improve the cutting and machining performance of the 303 type, a small amount of sulfur is added to the 303 type stainless steel, which is used for using bar material machining nuts.
Type 304 is suitable for using hot heading process to add stainless steel screws, such as longer specification bolts and large diameter bolts, which may fall within the range of cold heading process.
316 and 317 types both contain the alloying element Mo, therefore their high temperature and corrosion resistance are higher than those of 18-8 type stainless steel.