According to the current demand of the hardware market, the use of materials is also very important for standard parts, and the standard parts materials that may be used in different application areas are different, such as the performance standards of different materials, etc., according to the current According to market research, the standard parts mainly include carbon steel, stainless steel and copper.
Carbon steel: We distinguish low carbon steel, medium carbon steel and high carbon steel and alloy steel with carbon content in carbon steel.
1.low carbon steel C% ≤ 0.25% domestically known as A3 steel. Foreign countries are basically called 1008, 1015, 1018, 1022 and so on. Mainly used for 4.8-class bolts, 4-level nuts, small screws and other products without hardness requirements. (Note: The drill tail nail is mainly made of 1022 material.)
2.medium carbon steel 0.25% <C% ≤ 0.45% domestically known as 35, 45 steel, foreign countries are basically called 1035, CH38F, 1039, 40ACR and so on. Mainly used for 8-grade nuts, 8.8-class bolts and 8.8-class hexagonal products.
3.High carbon steel C%>0.45%. Currently basically not used on the market
4.Alloy steel: Adding alloying elements to ordinary carbon steel to increase some special properties of steel: such as 35, 40 chromium molybdenum, SCM435, 10B38. The Panwo screw mainly uses SCM435 chromium-molybdenum alloy steel, and its main components are C, Si, Mn, P, S, Cr, Mo.
Stainless steel: Performance rating: 45, 50, 60, 70, 80
Mainly divided into austenite (18%Cr, 8%Ni), good heat resistance, good corrosion resistance and good weldability. A1, A2, A4 martensite, 13% Cr have poor corrosion resistance, high strength and good wear resistance. C1, C2, C4 ferritic stainless steel. 18%Cr is better forging and corrosion resistance is stronger than martensite. Currently, the imported materials on the market are mainly Japanese products. According to the level, it is mainly divided into SUS302, SUS304, and SUS316.
Copper: Commonly used materials are brass...zinc-copper alloy. The market mainly uses H62, H65 and H68 copper as standard parts.
