Elastic cylindrical pin

　　Strength: 500-560HV30

　　Material: carbon steel, alloy steel Material: 65Mn

　　Material Description: 65Mn Spring Steel Chemical Composition: Carbon C: 0.62~0.70 Silicon Si: 0.17~0.37 Manganese Mn: 0.90~1.20 Sulfur S: ≤ 0.035 Phosphorus P: ≤ 0.035 Chromium Cr: ≤ 0.25 Nickel Ni: ≤ 0.30 Copper Cu: ≤ 0.25 Fold and edit the hardness of this paragraph Hot rolled hardness: 240~270HB Cold rolled soft hardness: 190~220HB Cold rolled hard hardness: 300~340HB Heat treated hardness: 38~60HRC

　　Surface treatment: phosphating

　　Surface treatment content: It is a process of chemical and electrochemical reactions to form a phosphate chemical conversion film, and the resulting phosphate conversion film is called a phosphating film. Phosphating is a commonly used pre-treatment technology, which should belong to chemical conversion film treatment in principle. It is mainly used for surface phosphating of steel, and can also be applied to non-ferrous metal (such as aluminum and zinc) parts. Not environmentally friendly, neutral salt spray test for 24 hours without red rust