Product name: Automobile auxiliary scraper rotating shaft
1. Unspecified tolerances shall be implemented according to GB/T 1804-f
2. Straight grain and twill knurling: modulus m=0.4
3. The overall quenching and tempering of parts is 30-36HRC
4. Surface treatment: electroplating trivalent chromium (5+2) L m, the parts passed the 96-hour neutral salt spray test
5. The drawing size is the size after surface treatment.
The 20 of 20 gauge steel refers to a carbon content of 0.2%, which is low carbon steel. The steel can be divided into low-carbon steel, medium-carbon steel, and high-carbon steel. Carbon content: low carbon steel is generally less than 0.25%; medium carbon steel is generally between 0.25 to 0.60%; high carbon steel is generally greater than 0.60%. In addition to steel contains carbon (C) elements and for deoxidation and contains a certain amount of silicon (Si) (generally not more than 0.40%), manganese (Mn) (generally not more than 0.80%, higher to 1.20%) alloying elements, does not contain other alloying elements (except for residual elements). Usually, the carbon content of less than 0.02% is called cooked iron, more than 2.11% to 4.3% is called pig iron, and the middle is steel.
