Carbon steel is an iron-carbon alloy with a carbon content ranging from 0.0218 percent to 2.11 percent. Carbon steel, also called carbon steel, generally also contains a small amount of silicon, manganese, sulfur, and phosphorus. In addition, the higher the carbon content in carbon steel, the greater the hardness and the higher the strength, but the lower the plasticity. According to the carbon content, carbon steel can be divided into low carbon steel, medium carbon steel and high carbon steel.

High carbon steel, often called tool steel, contains from 0.60% to 1.70% carbon and can be hardened and tempered. Hammers, crowbars, etc. are made of steel with a carbon content of 0.75%; cutting tools such as drills, taps, reamers, etc. are made of steel with a carbon content of 0.90% to 1.00%. Generally, high carbon steel has high strength and is widely used in cutting, drilling, lathe, milling and other environments that require high hardness. Medium carbon steel Carbon steel with a carbon content of 0.25% to 0.60%. 

Generally speaking, the difference between stainless steel and aluminum alloy is as follows: 1. In terms of price, stainless steel is expensive, and aluminum alloy is cheap; 2. The hardness of stainless steel is higher than that of aluminum alloy; 5. In terms of surface treatment, aluminum alloy is more abundant, including electrophoresis, spraying, anodizing, etc. There are few stainless steels; 6. Aluminum alloys with poor surface treatment will oxidize after being used for a long time, and there will be spots; stainless steels are relatively better, but the ingredients are not up to the standard or the maintenance is careless and still rusted.