Carbon steel is an iron-carbon alloy with a carbon content of 0.0218% to 2.11%. Also called carbon steel. Generally also contain a small amount of silicon, manganese, sulfur, phosphorus. Generally, the higher the carbon content in carbon steel, the greater the hardness and the higher the strength, but the lower the plasticity.
Influencing factors:
1. Manganese: about 0.25%~0.80%. Solid solution strengthening; removal of FeO to reduce the brittleness of steel; synthesis of MnS with sulfide, which can reduce the harmful effect of sulfur. beneficial.
2. Silicon: about 0.10%~0.40%, solid solution strengthening; except for the adverse effects of FeO on steel quality, it is beneficial.
4. Phosphorus: Increases strength and hardness, but reduces plasticity and toughness, making it "cold and brittle". harmful.
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