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Alloy steel In addition to iron and carbon, a small amount of alloying elements such as chromium and vanadium are added. The effect of these additional elements is to significantly alter the properties of the steels and make them more suitable for specific applications than plain carbon steels. Two widely used alloy steels are:

  • Chrome vanadium steel – this steel has a lower tendency to solidify than ordinary carbon steel;
  • Silicon Manganese Steel – A less expensive and more readily available material than Chrome Vanadium Steel, although the physical properties of the two steels are nearly identical.

Alloy steel can be divided according to different uses: alloy structural steel, steel used to manufacture mechanical parts and engineering structures; alloy tool steel, steel used to manufacture various tools; special performance steel, steel with certain special physical and chemical properties

what is high alloy steel?

They contain more than 12% alloying elements. A 13–18% chromium content (stainless steel) gives good corrosion resistance; austenitic steels with more than 11% manganese give high wear resistance. Some types have good heat resistance and high strength.

what are low alloy steels?

These typically contain less than 1.8% nickel, less than 6% chromium and less than 0.65% molybdenum. The tensile strength ranges from 450–620 N mm -2 to 850–1000 N mm -2 .

Alloy steel contains more other elements than carbon steel

Alloy steel refers to steel that contains silicon and manganese as alloying elements or deoxidizing elements, but also contains other alloying elements, and some also contain some non-metallic elements. According to the content of alloy elements in steel, it can be divided into low alloy steel, medium alloy steel, and high alloy steel.

Carbon steel mainly refers to steel whose mechanical properties depend on the carbon content in the steel, generally does not add a large amount of alloying elements, and is sometimes called ordinary carbon steel or carbon steel.

Carbon steel is also called carbon steel, an iron-carbon alloy with a carbon content WC less than 2%. In addition to carbon, carbon steel generally contains a small amount of silicon, manganese, sulfur, and phosphorus. According to the application, carbon steel can be divided into three categories: carbon structural steel, carbon tool steel, and free-cutting structural steel. According to the carbon content, carbon steel can be divided into low carbon steel (WC ≤ 0.25%), medium carbon steel (WC0.25% – 0.6%), and high carbon steel (WC>0.6%) [11]
Generally, the higher the carbon content in carbon steel, the higher the hardness and the higher the strength, but the lower the plasticity.

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