steel bolts
Generally and usually, the term steel bolts and nuts is used when they want to express the degree of hardness of a product higher than ordinary iron and steel. We mentioned above that the dry screw or steel is made of a combination of carbon and steel and has high strength. It is necessary to know that steel and dry screws are the same and do not differ significantly from each other. The main difference between these screws is usually in the class or grades. This product is classified in different grades, which can include class 5.6, class 8.8, class 10.9, and class 12.9. He knew class 2 and class 5. Pay attention, the higher the number of classes, the stronger it is, and as a result, the amount of carbon used in this screw will be higher. The strength of these products is usually introduced as the degree of hardness caused by different temperatures.
Types of Steel Pin
Steel screws are available in the market in three grades and different qualities.
Grade 8.8 steel screw is the most widely used type of steel screw in the market.
Steel screws are made with different types of screws such as hexagon screws, Allen screws, etc.
The steel screw is classified in different categories according to its thread pitch.
The most common pitch of this gear screw is mm.
Millimeter rib steel hexagon screw starts from 6 mm thickness and depending on the type of application, it can be made with higher thickness.
Specifications of different steel screw classes
Class 4.1 steel screw
Steel screw with class 8.8 can be considered as the softest type of this product; Because the carbon used in its structure is very low. As a soft screw, it has a tensile strength of 800 megapascals and the bearing weight is close to 80 kg. This class is made of steel bolt from CK45 rebar. Keep in mind that the softest type of steel bolts and nuts can bear at least 30 kg more weight than normal and iron bolts and nuts, which shows the special nature of this product.
Class Steel Screw Specifications.
Class 10.9 steel screw has more strength than the previous model that was examined, and more carbon is used in its body construction and it is produced in accordance with international standards. The structure of this type of screw is made of MO40 rebar. Due to the greater strength of this product compared to the previous model; It can withstand a stress equal to 940 megapascals and a weight of about 100 kg. Its nominal diameter also varies from five to 42 mm.
Class 2.1
steel screw specifications
This type of steel screw has the maximum amount of carbon in its steel structure and since it undergoes the most intense heat treatment, which makes it look very strong. The strength of this screw is such that it can withstand pressure and tension equal to 1100 megapascals. Regarding the weight bearing of this screw, it can be said that it can bear a weight equal to 120 kg. It is necessary to know that the said bolt is made of VCN200 rebar.
Application of steel bolts in industries
The use of steel bolts and nuts is determined according to their grade and class, but in general, the automotive, oil, petrochemical industries, industries related to the production of military products, shipbuilding, and boatbuilding can be considered the most consuming industries. He mentioned this bolt and nut; Because we said that this type of screw has high strength and can have better efficiency for this type of industries. In fact, it can be said that bolts and nuts are used in all jobs these days. Also, another issue related to the steel screw is the presence of a galvanized coating on its body, which acts as a protective barrier against moisture. For this reason, it is considered a suitable choice for environments where there is a possibility of normal corrosion of bolts and nuts.
