Stainless steel bolts usually refer to bolts that resist air, water, acid, alkaline salt or other media corrosion.Depending on the alloy ingredients, stainlessness and acid resistance are focused on.Although some stainless steel bolts are stainless, they are not necessarily acid -resistant, and acid resistance usually has stainlessness.For production fasteners, there are mainly Austeena stainless steel. In peoples daily life, the stainless steel bolt often referred to is also the Auspace stainless steel bolt.The stainless steel fasteners we use, raw materials mainly use the austenite 302, 304, 316 and "low nickel" 201.
Stainless steel bolt strength
The bolt is used to connect parts, so other performance requirements for strength and corrosion resistance are relatively high.In order to meet the requirements, bolts are generally made of stainless steel, and stainless steel itself has a certain level, which makes stainless steel bolts also have a certain level.The performance levels made of bolts made of different stainless steel are different. Generally, the performance level of stainless steel is high, and the performance level of bolts is also high.At present, the stainless steel bolts on the market are mostly made of Austeen stainless steel. The performance in the aspects of corrosion resistance and strength is more prominent.The performance level of stainless steel bolts is mainly assessed from three aspects: tensile strength, flexion ratio and yield strength. For example, the performance level is 4.6, the values ??of the above three aspects correspond to 400MPa, 0.6, and 240MPA.At present, the performance level of stainless steel bolts on the market is 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9 and other levels. Generally, we call the stainless steel bolts of 8.8 and above as high -strength stainless steel steel.bolt.
Stainless steel bolt material
The first, ordinary stainless steel bolts, stainless steels hardness is about 10 times higher than the hardness of copper. The processing difficulty is particularly difficult and the production process is more complicated.Its second feature is that it is not easy to rust in a humid environment. It has strong anti -maintenance ability and high corrosion resistance.304 stainless steel is environmentally friendly material. It has no harmful substances, does not pollute the environment, and is safe and reliable.This, 304 stainless steel bolts, the thread is more fine, the surface is smooth, the surface is uniform during production, it is not easy to produce slide phenomena. It is not easy to have a sliding head during installation, thereby reducing the installation time, reliable quality, wear -resistant resistanceEssenceThis 304 stainless steel bolt is different from 100 yuan to 16 yuan according to the different prices of the size.
The second type, Kim Kaious high -quality 304 stainless steel bolt has standard heads, round and smooth surfaces, large head bearing area, large bolts to withstand large tensile force, which is conducive to use.According to the specifications, this stainless steel bolt is about 1 yuan to 6 yuan.
Stainless steel bolt material
The material of the stainless steel bolt is Q215 and Q235, and the steel material composed of No. 25 and No. 45. The threads between the bolts sometimes need important connectors. At this time, you can choose 15CR and 20CR.Steel alloys, so as to improve the mechanical performance of the bolt.It contains 9 chemical components, including Ni, CU, C, S, Si, P, Mn, CR.
Stainless steel performance:
1. Chemical ingredients carbon, which enhances the hardness of stainless steel bolts. Of course, too high will affect the characteristics of stainless steel bolts.Decreased ductility and decreased corrosive.
2. Chemical composition chromium, increasing the corrosion resistance of the bolt, its antioxidant can also be enhanced, the bolt material containing chemical composition chromium is delicate, the intensity will be enhanced, the hardness will be enhanced, and abrasion resistance will also be enhanced.
3. Nickel of chemical ingredients: The high temperature intensity of its bolts will be enhanced, its anti -corruption characteristics will also be enhanced, and processing efficiency will be reduced.
4. Chemical ingredient molybdenum: The intensity of the bolt is enhanced, and the corrosive enhancement after contact with the air is enhanced.
5. Chemical ingredients Copper: Fixed molding, reducing the magneticity of the bolt.
Stainless steel bolt standard
Generally speaking, the countrys product attributes corresponding to stainless steel bolts have different standards, such as national standards, English standards, US standards, daily standards, etc.Its standards are specifically in accordance with international standards, such as GB/T6170-2000 and GB/T5782-2000.Moreover, stainless steel bolts can be divided into Austenitic, martensite, and iron.The markup system of stainless steel bolts is composed of two parts of short -term opening. The first part is the steel group, and the second part is the marking performance level.The rigid group is composed of a letter and a number. The letter refers to the category of steel, and the number refers to the scope of the chemical component of this class.Among them, A -Austrian Steel; C — Ma Shi Steel; F —Tramine steel.

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