How are the strength grades of stainless steel screws classified?

How are the strength grades of stainless steel screws classified?

The strength grade of stainless steel screws refers to the maximum tensile strength that the screw can withstand. In general, the strength grades of stainless steel screws are divided into the following grades: A2-50, A2-70, A4-70.

A2-50 A2-50 is a strength grade of stainless steel screws, where A2 indicates that the material is AISI 304 stainless steel, and 50 indicates that the minimum tensile strength of the screw is 500MPa. A2-50 stainless steel screws are mainly used in some applications that do not require high strength.

A2-70 A2-70 is a strength grade of stainless steel screws, where A2 indicates that the material is AISI 304 stainless steel, and 70 indicates that the minimum tensile strength of the screw is 700MPa. A2-70 stainless steel screws are mainly used in some applications requiring higher strength.

A4-70 A4-70 is a strength grade of stainless steel screws, where A4 indicates that the material is AISI 316 stainless steel, and 70 indicates that the minimum tensile strength of the screw is 700MPa. A4-70 stainless steel screws have better corrosion resistance and higher strength, and are suitable for some occasions that need to be used in corrosive environments.

In addition to the above grades, stainless steel screws have other strength grades, such as A2-80, A4-80 and so on. The strength grade of these stainless steel screws is selected according to its material and design application to ensure that the screws can withstand the required load and ensure safety when in use.

It should be noted that the price and material cost of stainless steel screws of different strength grades may be different, so the selection needs to be made according to the specific application scenario and the load to be borne

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