Steel is a mixture of iron with a small amount (typically less than 2%) of carbon. Increasing the amount of carbon makes high-carbon steel, which is harder and stronger, but more brittle.
High carbon steels are hard, strong and resistant to wear.
carbon
Anti-magnetic high manganese steels are just that.
Tool steels usually contain from 0.5% to 2.5% carbon. This level of carbon is necessary to combine with the carbide forming elements in the tool steels. These carbide-forming elements, when combined with the carbon, provide the necessary hardness and wear resistance. Check out the related link for more information on tool steels and their alloying element.
Spheroidization is an annealing process used for high carbon steels (Carbon > 0.6%) that will be machined or cold formed subsequently.
There are 4 they are Low Carbon steel, Medium Carbon Steel, High Carbon Steel and Eutectiod
state how low carbon steels can be given a hard case?
high thermal expansion
Carbon steels are designated by 4 number referring to the manganese and carbon content (e.g. 1018, 4140, 1095) High speed steel use a letter and number configuration for their designation. The high speed steels designations begin with one of two letters either an M for Molybdenum type or T for Tungsten type high speed steels. ( e.g. M-2, M-4, M-48 or T-1, T-15)
You can find high carbon steel in just about any everyday house tool. A few examples are knives, wheels, wrenches, drill bits, chisels, and saws.
medium and high carbon steels may also be called spring steel
High alloy steel contain: iron (base), carbon, nickel, vanadium, chromium, molybdenum, wolfram, silicon, etc.