basic material knowledge for Mechanical engineer : Carbon Steel

Carbon steel Callister and Rethwisch (2010) classified iron alloys based on carbon composition into 3 groups: iron with carbon content <0.008%, steel with a carbon content of 0.008% C to 2.14% C and cast iron with carbon content> 2.14%. The steels were subdivided into 3 groups: low carbon steel, medium carbon steel, and high carbon steel. low carbon steel Low carbon steels generally contain less than about 0.25% C and are unresponsive to heat treatment intended to form martensite. Reinforcement can be achieved by cold work. The microstructure consists of ferrite and pearlite constituents so that the alloy is relatively soft and weak but has excellent ductility and toughness. Low carbon steels are easy to work with (machinable) machines, easily welded (weldable) and least expensive to produce. medium carbon steel Medium carbon steels have a carbon concentration between 0.25 to 0.60%. This alloy can be heated by austenitizing, quenching, and then tempering to improve its mechanical properties. This group is most often used in tempered conditions, so it has a tempered martensite microstructure. Medium carbon steel has a low hardness and can be successfully performed heat treatment only in very thin parts and with a very fast cooling. The addition[…]

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