Shenzhen Shi Shi Tong Metal Products Co., Ltd

  Stainless screw in the production process, is it necessary to passivate? We all know that stainless steel has abilities in oxidation resistance and corrosion resistance. In many environments, it can be directly exposed to the air, so why will there be customers requiring  stainless screw  to do passivation treatment? Is that really necessary? Although  stainless screw  has a strong rust resistance, in some particularly harsh environments, it still will rust. Therefore, in order to improve the rust resistance of screws, it is necessary to carry out a passivation treatment.   Under normal circumstances, passivation treatment is at room temperature with passivation solution to soak the screws cleaning for 15 minutes, and then heated to 60 degrees or so soak for 15 minutes, such as the liquid into red, the treatment is completed. Passivation treatment can increase the salt spray test time by 12 hours, and can effectively improve rust resistance. In addition t...

Recently, many provinces have experienced power outages, such as Guangdong, Jiangsu, Zhejiang, and Northeast China. Electricity curtailment has a great impact on the manufacturing industry. The production capacity of factories cannot be guaranteed. The original delivery date may be delayed. Will it also affect  stainless screw suppliers ? Electricity curtailment also has an impact on  stainless screw suppliers . Especially in the power-cut area, the scheduled production of the product is very affected. Even if it is always in production during the time without power-cutting, many orders cannot be delivered according to the original schedule. And areas that are not limited by electricity will also be affected, because raw materials, surface treatments, etc. are not necessarily produced in areas that are not limited by electricity. In the production link, as long as one is affected, it will affect the entire link. This is interlocking. Moreover, there is currently no guarantee t...

Many people think that  special stainless screw  are screws that will not rust, but in fact stainless steel non-standard screws do not necessarily rust, but relatively speaking, stainless steel non-standard screws are more resistant to corrosion and rust than iron screws. However, special stainless screw will still rust under certain conditions. So what is the reason for the stainless steel special screw rust? What conditions lead to rust? S pecial stainless screw  have good characteristics, high temperature resistance, strong corrosion resistance and certain rust resistance. However, in the harsh environment, it will still rust. Like in a very humid environment, the wind is blowing in the sun, and the rain is blowing. After a long time, it will definitely be a little rusty. Or contact with some acid-base chemicals to produce a chemical reaction that causes corrosion and rust. There are also special screw for stainless steel materials that are n...

After the production of  star stainless screw , the general treatment method is to first remove the oil with the degreasing agent, then use the polishing agent for the bright light treatment, and then package and ship after drying. For screws that only remove oil and shine, you can usually pass the salt spray test for 48-72 hours. However, in daily work, customers often ask us if there is any way to extend the salt spray test time of stainless steel screws. Because many foreign customers, because the product needs the environmental impact of shipping, in order to ensure the quality of the product delivery, the salt spray test must reach more than 150 hours. In order to achieve this, it is necessary to passivate the  star stainless screw . The principle of passivation treatment is that after the stainless steel surface is immersed in contact with the passivation solution, a microchemical reaction is generated on the surface of the stainless steel, and the original chemically...

Every company knows that new products are basically required to be customized with non standard screws.  Special stainless screw  will result in more accurate results when assembling new products, helping customers to develop better products. At present, most of the screw manufacturers are unable to produce difficult non-standard shaped screws due to limited technical capabilities, and there are few manufacturers of non-standard screws that can be difficult. Some time ago, Mr. Zhang from Dongguan found the Shi Shi Tong screw through online search. Miss Song contacted Mr. Zhang. The customer sent the drawings to Miss Song, and then Miss Song asked the customer about the product requirements, surface treatment and so on. The customer told Ms. Song that the surface of the special stainless screw was not required to be electroplated and shipped directly to the original color. Miss Song gave Mr. Zhang a price. The customer asked Miss Song about the right angle on the screw....

What is the strength of the  stainless steel a2 70 screw ? Many people don’t know the strength of stainless steel screws. In many people’s perceptions, high-strength screws are generally made of carbon steel, and the biggest feature of 304 stainless steel screws is its anti-rust ability. Few people will pay attention to the strength level of 304 stainless steel screws. Does it mean that 304 stainless steel screws have no strength grade? Today, Shishitong stainless steel screw manufacturers came to talk to you about the strength level of 304 stainless steel screws: 304 stainless steel 0Cr19Ni9 (0Cr18Ni9) HB139-187, is austenitic stainless steel material, carbon steel not more than 0.08%, manganese content 2%, yield point 205MP, tensile strength ≥ 515Mpa, good corrosion resistance, and other types of stainless steel Compared with other materials, the difference between 304 stainless steel and other materials is the difference in nickel content, and the corrosion resistance rat...