Stainless steel bolts are made of stainless steel, including stainless steel SUS201 bolts, stainless steel SUS304 bolts, stainless steel SUS316 bolts, stainless steel SUS316L bolts.The performance grades of stainless steel bolts, studs, studs are divided into 10 grades: from 3.6 to 12.9.

The number in front of the decimal point represents 1/100 of the ultimate tensile strength of the material, and the number behind the decimal point represents 10 times the ratio of the yield limit to the ultimate tensile strength of the material.

Common problems and precautions of stainless steel bolts

A stainless steel bolt will rust because the protective film of stainless steel received damage?The stainless steel bolt encountered water that condensed in the air.

Contamination means they contain large amounts of sulfides or carbon monoxide.When they come into contact with water, they form sulfuric acid and hydroxides, which chemically corrode the stainless steel bolts.

Two. How to better choose the stainless steel bolt material?

1. Stainless steel is usually a steel that is resistant to corrosion by air, water, acid, alkali metal salts or other media.Depending on the composition of the alloy, the emphasis is on corrosion resistance and acid resistance.

Although some steels are rust resistant, they are not necessarily acid resistant, and acid resistant steels are usually rust resistant.

2. Mechanical properties of stainless steel screw material, especially strength requirements;2. Corrosion resistance requirements of materials according to working conditions; 

3. Heat resistance (high temperature resistance, oxidation resistance) requirements of the material

4. According to the requirements of production technology for material processing performance

Other aspects such as weight, price, purchase and many other factors must be taken into consideration.

III. Precautions for storage of stainless steel bolts:

1. When storing stainless steel bolts, product protection should be strengthened. In a dry environment, do not put galvanized iron bolts in a wet place.

2. The hardness of stainless steel bolts indicates that the material can withstand hard objects pressed into its surface.It is one of the important performance indexes of metal materials.

3. When testing the hardness of stainless steel nuts, the bolts without heat treatment should only make the surface hardness within the qualified range.