How much carbon steel generally contains and what is the carbon content of steel?

The properties of carbon steel are mainly determined by the carbon content. As the carbon content increases, the strength and hardness of the steel increases, and the plasticity, toughness and weldability decrease. Compared with other types of steel, carbon steel is the earliest used, with low cost, wide performance range and the largest amount.

It is usually divided into low carbon steel (carbon content is medium carbon steel (carbon content is high carbon steel (carbon content is divided into ordinary carbon steel by quality, and its harmful impurities phosphorus and sulfur content are less than, including Class A steel (Class A steel, to ensure mechanical properties), Class B steel (Class B steel, to ensure chemical composition) and special steel (Class C steel, to ensure mechanical properties and chemical composition); High-quality carbon steel, the content of harmful impurities phosphorus and sulfur is less; High-grade high-quality carbon steel, with less harmful impurities phosphorus and sulfur content. According to the use, it is divided into carbon structural steel and carbon tool steel, the former is mainly used to manufacture various structural parts and machine parts, generally low carbon steel and medium carbon steel; The latter is used to make knives, measuring tools, molds, etc., and is generally high-carbon steel.

It should be that A3 is mild steel.

Mild steel c% domestically is commonly referred to as A3 steel.

Steel is a general term for iron-carbon alloys with a carbon content and mass percentage between to. The chemical composition of steel can vary greatly, and steels that contain only the carbon element are called carbon steel (carbon steel) or ordinary steel. Generally, the higher the carbon content in carbon steel, the greater the hardness and the higher the strength, but the lower the plasticity.

Classified by high and low carbon content.

Low carbon steel: the carbon content is generally lower than the mass fraction);

Medium carbon steel: carbon content is generally mass fraction);

High carbon steel: the carbon content is generally higher than the mass fraction).

Steel properties and uses

1) Carbon structural steel.

Carbon steel, which is used in buildings, bridges, ships, vehicles and other structures, must have a certain strength, and require impact performance and welding performance if necessary.

2) Low-alloy high-strength structural steel.

Used in buildings, bridges, ships, vehicles, pressure vessels and other structures, the carbon content (smelting analysis) is generally not greater, the sum of alloying elements is generally not greater than that, the yield strength is not less than 295MPa, and it is a low-alloy steel with good impact toughness and welding performance.

3) Tool steel.

A general term for steel used in the manufacture of various cutting tools, forming tools, and measuring tools. It is usually divided into unalloyed tool steel, alloy tool steel and high-speed tool steel. The required properties are mainly strength, toughness, hardness, wear resistance and temper stability.

1 mild steel. Usually c%, called mild steel, has lower strength, better plasticity and weldability.

2.Medium carbon steel.

c% in, called medium carbon steel, has higher strength, but poor plasticity and weldability.

3.High-carbon steel.

c%, called high-carbon steel. Plasticity and weldability are very poor, but they will have high strength and hardness after heat treatment.

The carbon content of high-carbon steel is between years and years, and more than 2% is cast iron.

Carbon is the most important factor determining the mechanical properties of steel, with the increase of carbon content, the hardness increases, and the plasticity and toughness decrease. When the carbon content is ", the intensity increases with the increase of carbon content, and when the carbon content increases, the intensity decreases.

Carbon steel can be divided into three types according to its different carbon content, namely: low carbon steel - carbon content WC, medium carbon steel - carbon content, high carbon steel - carbon content WC >.

The production of steel is a costly and inefficient job. Today, steel is one of the most used materials in the world due to its inexpensive, reliable properties, and is an indispensable ingredient in the construction, manufacturing and daily lives of people. It can be said that steel is the material basis of modern society.

The percentages are between to.

The most commonly used medium carbon quenched and tempered steel, with good comprehensive mechanical properties, low hardenability, and easy cracks when water quenched. Small parts should be quenched and tempered, and large parts should be normalized.

After quenching and tempering, it is used to manufacture medium-speed, medium-load parts, such as machine tool gears, shafts, worms, spline shafts, thimble sleeves, etc., and is used to manufacture high-hardness and wear-resistant parts with high surface hardness after quenching and high-frequency surface quenching, such as gears, shafts, spindles, crankshafts, mandrels, sleeves, pins, connecting rods, screws and nuts, intake valves, etc.

The main difference between pig iron, wrought iron and steel is the carbon content, iron with a carbon content of more than 2 is called pig iron; Iron with a carbon content lower than that is called wrought iron; Iron with a carbon content of 0 05 2 is called steel.

(1) Carbon steel: AMild steel (c; b.Medium carbon steel (c; c.High-carbon steel (c.

Generally, the carbon content is less than wrought iron or pure iron, the content is called steel, and the content above is called pig iron.

The carbon content of low carbon steel (AISI1005 1026) is, the manganese content is, the phosphorus content does not exceed, and the sulfur content does not exceed.

The carbon content of medium carbon steel (AISI1029 1053) is, the manganese content is, the phosphorus content does not exceed, and the sulfur content does not exceed.

The carbon content of high-carbon steel (AISI1055 1095) is, the manganese content is, the phosphorus content does not exceed, and the sulfur content does not exceed.