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What are the common materials of screws

What are the common materials of screws

Common materials for screws include the following:

  1. Copper: In the screw industry, there are pure copper (T2, T3), oxygen-free copper (TU0, TU1, TU2) and phosphorized oxygen copper (TP1, TP2). In actual production, we usually use 59 copper, 59-1 copper, 62 copper, 65 copper, 68 copper and 70 copper. In addition, there are categories such as brass, red copper and bronze.
  2. Carbon steel: also known as iron screws, its classification includes low carbon steel, medium carbon steel and high carbon steel. Low carbon steel is mainly used for 4.8 class bolts and 4 class nuts, small screws and other products without hardness requirements; Medium carbon steel is mainly used for 35, 45 steel; High carbon steel is less used in the market due to its higher carbon content.
  3. Stainless steel: Stainless steel is also a common screw material, mainly divided into martensitic stainless steel, austenitic stainless steel, ferritic stainless steel and so on. Commonly used are SUS200 series, SUS302, SUS304, SUS316, SUS410 and so on.
  4. Pure aluminum and aluminum alloy: In recent years, the use rate of pure aluminum and aluminum alloy in high-end products has gradually increased. Medical devices, high-speed rail, aerospace and robotics projects are heavily used in both materials. In general, the material of the screw is diverse, according to the specific use scenario and requirements, you can choose the appropriate material.