1. Casting low-alloy steel: containing manganese, chromium, copper and other alloy elements of cast steel. The total amount of alloying elements is generally less than 5%, has a large impact toughness, and through the heat treatment to obtain better mechanical properties. Casting low alloy steel has better performance than carbon steel, can reduce the quality of parts and improve the service life.
2. Casting special steel: to meet the special needs of the refining of alloy cast steel, a wide variety, usually containing one or more of the high amount of alloying elements to obtain a special performance. For example, manganese containing 11% to 14% of high manganese steel to withstand impact wear, and more for mining machinery, engineering machinery wear parts; chromium or chromium nickel as the main alloy of various stainless steel, for corrosion or 650 ℃ above the high temperature conditions of the work of parts, such as chemical body, pump, container or large capacity power plant turbine casing.
3. Cast carbon steel: carbon as the main alloying elements and contains a small amount of other elements of cast steel. Carbon less than 0.2% for the casting of low carbon steel, carbon 0.2% to 0.5% of the cast carbon steel, carbon containing more than 0.5% for the casting of high carbon steel. With the increase of carbon content, the strength of cast carbon steel increases and the hardness increases. Casting carbon steel has a high strength, plasticity and toughness, low cost, heavy machinery used in the manufacture of heavy load parts, such as rolling mill rack, hydraulic machine base; in the railway vehicle for manufacturing force But also bear the impact of parts such as bolster, side frame, wheels and couplers and so on.
Carbon content and the amount of alloy determines the classification of cast steel and cast steel characteristics, the use of different types of cast steel are also different, so the right to buy steel castings are of great help. Buyers should carefully understand the characteristics of a reasonable choice of steel castings.