Shenzhen Shi Shi Tong Metal Products Co., Ltd

  Undesirable businessman:10B21 can produce 12.9 grade stainless steel screws round head. What material can be used to produce high strength 12.9  stainless steel screws round   head ? Can material 10B21 be used? Mr. Gao from Guangzhou wants to order 3,000 pieces of high-strength 12.9-grade  stainless steel screws round head . He used the material of 10B21 before but found that the strength of the screws did not meet his requirements after use. This time, Mr. Gao would like to consult the reason for the screws’ customization of Shi Shi Tong. Manager Liu, who manages the production of the factory, told him that although 10B21 also belongs to alloy steel, the strength grade and performance grade of the screws produced with it cannot meet the 12.9 grade after hardening. Finally, the engineering department suggested Mr. Gao use SCM435 material to produce screws because its strength could fully meet his requirements after heat treatment and electroplating to remove hydrog...

  When M3 carbon steel countersunk head long screws become bent… When you want to use long screws urgently, the screws are bent. What should you do? After a pleasant communication with Miss Liang from the sales department of Shi Shi Tong, Mr. Wang from Hangzhou decided to give 200  M3 carbon steel countersunk head   long screws  with bent rods to Shi Shi Tong for straightening. According to Mr. Wang’s experience, Ms. Liang first told Mr. Wang the reason for bending  M3 carbon steel countersunk head long screws . Because Mr. Wang required to improve the hardness, strength, and corrosion resistance of the screws, the original last factory made heat treatment of the screws, that is, hard surface treatment. After measurement, the rods of the screws are bent from 0.2mm to 1.2mm. The reason for this is that carbon steel screws are usually heat treated as a bunch of screws, so there are always unevenly heated screws, which can cause them to bend. In addition, the rate ...