Classification method and main application of carbon steel!

 Classification method and main application of carbon steel!

What is carbon steel?

It mainly refers to the steel whose mass fraction of carbon is less than 1.3% and does not contain deliberately added alloying elements. Sometimes also known as plain carbon steel or carbon steel.

1. According to the C content contained in steel, it can be divided into low carbon steel, medium carbon steel and high carbon steel.

1. Low carbon steel

Also known as mild steel, low carbon steel with carbon content from 0.10% to 0.30% is easy to accept various processing such as forging, welding and cutting, and is often used to manufacture chains, rivets, bolts, shafts, etc. Low-carbon steel is generally rolled into angle steel, channel steel, I-beam, steel pipe, steel strip, and steel plate, and is used to make various building components, containers, boxes, furnaces, and agricultural machinery. High-quality low-carbon steel is rolled into thin plates to make deep-drawing products such as automobile cabs and engine covers; it is also rolled into bars to make mechanical parts that do not require high strength.

2. Medium carbon steel

Carbon content (C: 0.25% < C ≤ 0.6%) can also contain a small amount of manganese (0.70% ~ 1.20%) in addition to carbon. Its thermal processing and cutting performance are good, but its welding performance is poor. The strength and hardness are higher than low carbon steel, but the plasticity and toughness are lower than low carbon steel. Therefore, in various uses of medium strength level, medium carbon steel is the most widely used. In addition to being used as building materials, it is also widely used in the manufacture of various mechanical parts. Medium carbon steel is mainly used to manufacture high-strength moving parts, such as air compressors, pistons of pumps, impellers of steam turbines, shafts, worms, gears of heavy machinery, etc., parts with wear-resistant surfaces, crankshafts, machine tools Spindle, rollers, fitter tools, etc.

3. High carbon steel

Carbon content (C: 0.6%~1.3%) is often called tool steel. The carbon content is from more than 0.60% to 1.70%. It can be hardened and tempered. Hammers, crowbars, etc. are made of steel with a carbon content of 0.75%; cutting tools such as drills, taps, reamers, etc. are made of steel with a carbon content of 0.90% to 1.00%. The higher the carbon content, the greater the hardness and strength, but the lower the plasticity.

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