Price introduction of stainless steel screws
Stainless steel screws have different prices according to different specifications. For example, the price of M3 series stainless steel screws, whether crosshead or round head, is very low, about 4 cents. The price of a package of self-tapping screws (about 150) is generally around 6 yuan. Sheng Yuan and other domestic brands, the price of 304 expansion screws and bolts is around 3.2 yuan/10. Many socket head cap screws are not cheap, such as domestic 304 stainless steel socket head cap screws, the price is around 9.8 yuan/10.
Brief introduction of stainless steel screws
Stainless steel screw is a kind of screw made of various alloy components. According to the different components, it can be divided into stainless steel and acid resistance. Although some screws are stainless, they are not necessarily acid-resistant, but acid-resistant stainless steel screws are often stainless. The stainless steel screws we commonly use now are mainly austenitic 302, 304, 3 16 and "low nickel" 2065438. Now stainless steel screws are mainly used in environmental protection equipment, medical instruments, food machinery, open-air occasions and so on.
How to maintain stainless steel screws?
Although stainless steel screws are small in size, they are not "all-round fighters" and need our care in life! The first thing we need to know is that the characteristics of stainless steel screws are good, but if they are used in a very humid environment for too long, or if they encounter acid and alkali chemicals, various chemical reactions will occur. Therefore, when installing stainless steel screws, you should choose the corresponding screws. For example, stainless steel screw SUS20 1 is not suitable for use in seawater with high salinity, while stainless steel screw SUS3 16 should be used on the sea, because the corrosion resistance of stainless steel screw SUS 3 16 is much better.
What factors should be considered when purchasing stainless steel screws?
Stainless steel screws refer to screws made of steel with corrosion resistance to air, water, acid, alkali salt or other media. If you want to buy the stainless steel screws you need, you need to consider the factors.
1. Whether the corrosion resistance and heat resistance of the selected stainless steel screws are good;
2, whether the performance is high, whether it can be strengthened by heat treatment;
3. The requirements of production technology on the processability of materials;
4. What are the specifications and material standards of stainless steel screws?
Stainless steel screws are mainly used in environmental protection equipment, medical instruments, communication equipment, power facilities, electronic products, instruments and meters, food machinery, petrochemical industry, ship assembly, pumps and valve pipes, building curtain walls, open-air occasions, sports facilities, outdoor decoration and so on.
Installation method of stainless steel screws:
1. Select the alloy drill bit that matches the external diameter specification of the internal expansion bolt, then drill the hole according to the length of the internal expansion bolt until the hole is deep enough for you to install, and then clean the hole.
2. Install the flat pad, spring pad and nut, screw the nut to the bolt and the end to protect the thread, and then insert the internal expansion bolt into the hole.
3. Turn the wrench until the washer is flush with the fixture surface. If there is no special requirement, generally tighten it by hand, and then turn it with a wrench for three to five turns.
Precautions for stainless steel screws:
1, drilling depth: whether the depth is better in concrete construction or about 5 mm deeper than the length of expansion pipe. As long as it is greater than or equal to the length of the expansion pipe, the length of the internal expansion bolt left underground is equal to or less than the length of the expansion pipe.
2. Of course, the requirement of the internal expansion bolt on the ground is that the harder the better, which also depends on the stress of the object you need to fix. The mechanical strength of concrete (C 13- 15) is five times that of brick.
3. After M6/8/10/12 internal expansion bolt is correctly installed in concrete, its ideal maximum static stress is120/170/320/510 kg respectively.
How's it going? Do you know the price knowledge of stainless steel screws introduced by Bian Xiao? Pay attention to the quality when buying screws to avoid recent corrosion.