Hardness tests are performed on each batch of heat-treated martensitic stainless steel products to ensure that they can withstand normal loads during use and avoid safety issues such as breakage or failure during use.

Torque tests are performed on each batch of products to ensure their reliability and safety and avoid failures caused by abnormal torque.

Each batch of high-strength products is tested for attack speed to ensure product accuracy and stability, reduce customer costs and improve construction efficiency.