304 stainless steel is a common material in stainless steel, with a density of 7.93 g/cm3, which is also called 18/8 stainless steel in the industry. High temperature resistance of 800 degrees, good corrosion resistance, and rust resistance. It has the characteristics of good processing performance and high toughness. The steel must contain more than 18% of chromium and more than 8% of nickel. 304 stainless steel is produced in accordance with the American ASTM standard A grade of stainless steel that comes out.

Grade 8.8 is made of 1035ACR, 1040ACR, CH38F, 1045ACR, 1039, 10B21, 10B33, 10B38 and above. Grade 8.8 bolts can be made, but it is easy to rust. It is low-carbon alloy steel or medium-carbon steel and has been heat treated (quenched + tempered). ), in order to achieve the strength of 8.8, that is, high-strength bolts. Suzhou Anzhikou Hardware Technology Co., Ltd. does the same. 8.8 carbon steel only requires strength and hardness, while stainless steel 304 only requires rust prevention and beautiful appearance.