For example, low carbon steel (carbon content is less than 0.25%) has good plasticity and toughness, easy forging processing, suitable for the manufacture of more complex shapes but the strength requirements are not very high shaped forgings, such as some common mechanical connection parts.
Stainless steel: 304, 316, 321, 22053, stainless steel contains at least 10.5% chromium, chromium element can make the steel surface to form a dense chromium oxide protective film, so as to have good corrosion resistance. Stainless steel can also be divided into austenitic stainless steel, martensitic stainless steel and ferritic stainless steel and other different types, and the performance characteristics of each type are different. Austenitic stainless steel has good plasticity and corrosion resistance, martensitic stainless steel has high strength, and ferritic stainless steel has good oxidation resistance. Alloy steel 15CRMO, 1CR5MO, A182 F11, A182 F91, 09MNNID In addition to iron and carbon, but also contains one or more alloying elements, such as chromium, nickel, molybdenum, vanadium and so on.
The addition of these alloying elements can significantly improve the properties of steel. For example, chromium can improve the corrosion resistance of steel, and nickel can improve the toughness and fatigue resistance of steel. The strength, toughness, wear resistance and corrosion resistance of alloy steel are superior to carbon steel, and can meet the requirements of more complex and harsh working conditions.