Standard pieces of rivet nuts Nuts Screws Bolts are essential in everyday life and in industrial manufacturing. Pressure riveting screws Stud nuts Nuts Bolts are also known as industrial rice. Standard parts have an important task in the industry. As long as there is industry on the earth, the function of fasteners is always important.
Standard pieces of rivet nuts Nut bolts Bolts commonly used materials are based on the strength of nut bolt nut bolts using different materials, the current standard on the market mainly carbon steel, stainless steel, copper three materials. The following small screw will give you a brief introduction to the raw material carbon steel raw materials, and hope to be helpful to everyone.
Carbon steel is an iron-carbon alloy with a carbon content Wc of less than 2.11%. Also called carbon steel. It usually contains a small amount of silicon, manganese, sulfur and phosphorus. In general carbon steel, the higher the carbon content, the greater the hardness and the higher the strength, but the lower the plasticity.
(1) Carbon steel can be divided into three categories according to purpose: carbon structural steel, carbon tool steel and free-cutting structural steel. Carbon structural steel is divided into two types: engineering steel and machine-made structural steel.
(2) According to the smelting method, it can be divided into open hearth steel and converter steel;
(3) Deoxidation methods can be divided into boiling steel (F), killed steel (Z), semi-static steel (b) and special killed steel (TZ);
(4) Carbon steel can be classified into low carbon steel (WC ≤ 0.25%), medium carbon steel (WC 0.25%-0.6%) and high carbon steel (WC> 0.6%) in terms of carbon content;
(5) According to the quality of steel, carbon steel can be divided into common carbon steel (higher phosphorus and sulfur content), high-quality carbon steel (lower phosphorus and sulfur content) and high-grade steel (lower phosphorus and sulfur content). ) and premium grade steel.
Carbon steel: We distinguish between low carbon steel, medium carbon steel and high carbon steel, and alloy steel by carbon content in carbon steel.
1. Low carbon steel C% ≤ 0.25% Domestically known as A3 steel. Basically known abroad as 1008,1015,1018,1022 and so on. It is mainly used for products with no hardness requirements such as 4.8 bolts, 4 nuts, and small screws. (Note: The drilling screw is mainly made of 1022 material)
Nut Column Screws Bolts mainly use 1008 1006 raw materials, SAE1008 is the American Society of Automotive Engineers standard, 10 represents Mn less than 1%, and 08 represents carbon content; the main difference between 1008 and 1006 is the difference in carbon content. SAE is the United States Steel Numbering.
According to the results of the existing data query, the main differences between the chemical compositions of 1006 and 1008 are:
a. Inconsistent carbon-carbon content: 1006 with C less than 0.08 and 1008 less than 0.10
b. Inconsistent manganese (Mn) content: 1006 with Mn less than 0.45 and 1008 less than 0.50
2. Medium carbon steel 0.25% <C% ≤ 0.45% Domestically known as No. 35, No. 45 steel, foreign generally known as 1035, CH38F, 1039, 40ACR and so on. Mainly used for 8 grade nuts, 8.8 bolts, and 8.8 grades of hexagonal products.
3, high carbon steel C%> 0.45%. The market is basically not used.
4, alloy steel: In the ordinary carbon steel alloy elements added to increase some of the special properties of steel: 35,40 chromium molybdenum, SCM435, 10B38.