Bolts Factory introduces the reasons for the fracture of stainless steel screws:

1. The quality of the raw materials used in stainless steel screws is poor, and the quality of the stainless steel screw wire is not good. There are many impurities and impurities, resulting in the insufficient hardness of stainless steel screws.

 
2. The customer used too much force when using stainless steel screws. Generally, you do a torque test to see what the minimum breaking force is, and then adjust the torque. If the screw torque is required to be high, the screw must be heat treated. At present, the stainless steel 410 material can be heat treated. The heat-treated stainless steel 410 screw has a surface hardness of HV580-680 and a core hardness of HV350-450.

 
3. Process problems in the production of stainless steel screws. For example, stainless steel screws with eccentric heads, and the Q value is too deep and the R position is too small during the undershooting operation during manufacturing.

4. See if the pre-hole is suitable, the pre-hole will be broken when the small screw is tapped. Therefore, when we buy stainless steel screws, we must recognize and be optimistic, in case we buy inferior products, which will cause unnecessary trouble to ourselves during the use process.