What are the differences between high quality carbon steel and ordinary carbon steel?

OrdinaryCarbon steelThe difference with high-quality carbon steel is the difference in carbon content.

Classified by quality:

1. Ordinary steel (p,s contains sulfur and phosphorus.

2. High-quality steel (P, S contain sulfur and phosphorus.

3. High-grade high-quality steel (p,s sulfur, phosphorus.

Manufacturing process. The smelting of carbon steel is usually carried out in converters and open-hearths. Converters generally smelt ordinary carbon steel, while open-hearth furnaces can smelt all kinds of high-quality steel. Oxygen top blowing converter steelmaking technology is developing rapidly, and there is a trend to replace open-hearth steelmaking.

The molten steel is injected into the ingot mold to obtain various ingots. After forging or rolling, the ingots are processed into steel plates, steel strips, steel bars and section steel of various cross-sectional shapes. Carbon steel is generally used directly in the hot-rolled state.

When used in the manufacture of tools and various machine parts, heat treatment is required according to the requirements of use, and as for steel castings, most of them are heat treated.

According to the phosphorus and sulfur content, carbon steel can be divided into ordinary carbon steel (higher phosphorus and sulfur), high-quality carbon steel (lower phosphorus and sulfur) and high-grade high-quality steel (lower phosphorus and sulfur) and super-grade high-quality steel.

High-quality carbon steel is divided into low-carbon steel (low carbon content between 0 and 25%) and high-carbon steel (carbon content greater than. According to the manganese content, it is divided into two categories: ordinary manganese content and high manganese content. According to the different contents of impurities in the steel, it is divided into high-quality steel, high-grade high-quality steel, and super-high-quality steel.

This type of steel must ensure the chemical composition and mechanical properties of the steel at the same time. The commonly used steel grades on pressure vessels are No. 20 and No. 35 steel, and the national standard for this type of steel is GB699 99

Steel is divided according to its chemical composition. There are two types of carbon steel and alloy steel.

According to the use, there are three types of steel: structural steel, tool steel, and special performance steel, among which structural steel includes carbon structural steel.

1. Classification by quality.

1) Ordinary steel (p,s.)

2) High-quality steel (P, S average

3) High-grade high-quality steel (p,s.)

1 Carbon Structural Steel.

Grade: e.g. Q235-A·F, indicating S 235MPa Features: Low cost, excellent process properties (such as weldability and cold formability).

Application: General engineering structure and general mechanical parts. For example, Q235 can make bolts, nuts, pins, hooks and less important mechanical parts, as well as rebar, section steel, steel bars, etc. in building structures.

2 High-quality carbon structural steel.

Grades: e.g. MN, 08F Application: Non-alloy steels used to manufacture important mechanical parts are generally used after heat treatment. Commonly used steel grades and uses:

08F, low mass fraction of carbon, good plasticity, low strength, used for stamping parts such as automobiles and instrument housings; 20. Good plasticity and weldability, used for parts and carburizing parts with low strength requirements, such as hoods, welding containers, small shafts, nuts, washers and carburizing gears, etc.;

45,40mn, after quenching and tempering, the comprehensive mechanical properties are good, and it is used for mechanical parts with large stress, such as gears, connecting rods, machine tool spindles, etc.;

MN steel has high strength; It is used in the manufacture of various springs, locomotive rims, and low-speed wheels.

3 Carbon tool steel.

Grade: For example, T12 steel means carbon tool steel with WC=. Features: It belongs to eutectic steel and hypereutectic steel, with high strength, hardness and good wear resistance, which is suitable for manufacturing various low-speed cutting tools.

Commonly used steel grades and uses:

T7, T8: Produce parts that require toughness to withstand a certain impact. Such as sledgehammers, punches, chisels, woodworking tools, scissors T9, T10, T11: Manufacture tools with low impact that require high hardness and high wear resistance. Such as taps, small drills, dies, and hand saw blades.

T12, T13: Make tools that are not subject to impact. Such as files, scrapers, razors, measuring tools.

4 Cast steel. Grade: e.g. ZG200-400, which means S 200MPa, B 400MPa cast steel.

Performance: The casting performance is worse than that of cast iron, but the mechanical properties are better than that of cast iron;

Carbon steel is also called carbon steel. Commonly welded mild steel (including C 0.).25%) and medium carbon steel (with c = 0.).

25%--0. 60%）；High-quality carbon structural steel).

Hello, carbon steel is steel that contains carbon and manganese, and does not contain other alloy components.

Commonly used are 45 steel, Q345B, 35 steel, 16MN and so on.

According to the different carbon content, carbon steel is divided into low carbon steel, medium carbon steel and high carbon steel, with the increase of carbon content, the hardness of carbon steel increases, and the toughness decreases.

1) Mild steel - carbon content. 2) Medium carbon steel - carbon content.

3) High carbon steel - carbon content

1) Alloy structural steel: used as engineering components (pipes and supports, etc.); Various mechanical parts (shafts, gears, springs, impellers, etc.).

2) Alloy tool steel: used as measuring tools, molds, cutters, etc.

3) Special performance steel: such as stainless steel, heat-resistant steel, etc., with special physical properties or chemical properties.

Carbon steel can generally be divided into: ordinary carbon steel, of which ordinary carbon steel can be divided into class A steel, class B steel and special class steel, high-quality carbon structural steel and carbon tool steel.

Carbon steel is actually a very hard carry, and he adds carbon in it, so the common ones are the rebar we see.

What are the types of steel Carbon steel can generally be divided into: ordinary carbon steel, of which ordinary carbon steel can be divided into class A steel, class B steel and special steel, high-quality carbon structural steel and carbon tool steel. The code and meaning of carbon steel.

Carbon steel is ordinary steel, which can be divided into low-carbon steel, medium-carbon steel, and high-carbon steel, and in general, low-carbon steel is better than other types of steel, and the properties of high-carbon steel are close to pig iron, because just is to reduce the carbon content in pig iron."

Steels that contain small amounts of manganese, phosphorus, silicon, sulfur and other elements and have a lower carbon content include high-carbon steel, medium-carbon steel and low-carbon steel.

The main difference between steel and iron is the carbon content, carbon steel has very strict requirements for the content of carbon elements in steel, which is a special material.

What is Carbon Steel? What are the commonly used ones? I think you should still learn about the manufacturers of carbon steel, and they will tell you the synthetic materials of carbon steel in detail.

Carbon steel, also known as carbon steel and carbon steel, is a carbon-containing iron-carbon alloy, whose hardness, strength and plasticity are related to carbon content, generally the higher the carbon content, the greater the hardness, the greater the strength, and the lower the plasticity. If you want to know more about "what is the nature of carbon steel", you can continue to read.

1. Carbon steel leakage cover Wang refers to an iron-carbon alloy with a mass fraction less than that, which generally contains a small amount of silicon, manganese, sulfur, phosphorus and other elements.

2. According to the use, carbon steel can be divided into carbon structural steel, carbon tool steel and free-cutting structural steel, according to the carbon content, carbon steel can be divided into low carbon steel, medium carbon steel and high carbon steel.

3. According to the smelting method, carbon steel can be divided into open-hearth steel, converter steel, and according to the quality of steel, carbon steel can be divided into ordinary carbon steel, high-quality carbon steel, high-grade high-quality steel and super-high-quality steel.

4. Different carbon steels have different uses, such as carbon structural steel is generally used for engineering structures and ordinary mechanical parts, and carbon tool steel is generally used to make sledgehammers, chisels, taps, razors, etc.

The above is "what is the nature of carbon steel", through we know that carbon steel refers to the carbon content of iron-carbon alloy, which generally contains a small amount of silicon, manganese, sulfur, phosphorus and other elements.

Alloying properties of the material. Carbon steel generally refers to carbon steel, and carbon steel is an iron-carbon alloy with a carbon content. It is also called carbon steel. Generally, it also contains small amounts of silicon, manganese, sulfur and phosphorus. Generally, the higher the carbon content in carbon steel, the greater the hardness and the higher the strength, but the lower the plasticity.

Classification of carbon steel: (1) According to the use, carbon steel can be divided into three categories: carbon structural steel, carbon tool steel and free-cutting structural steel, and carbon structural steel is divided into two types: engineering construction steel and machine manufacturing structural steel;

2) According to the smelting method, it can be divided into open-hearth steel and converter steel;

3) According to the deoxidation method, it can be divided into boiling steel (F), calm steel (Z), semi-calm steel (B) and special calm steel (TZ);

4) According to the carbon content, carbon steel can be divided into low carbon steel (WC), medium carbon steel (and high carbon steel (WC>;

5) According to the quality of steel, carbon steel can be divided into ordinary carbon steel (higher phosphorus and sulfur content), high-quality carbon steel (lower phosphorus and sulfur content) and high-grade high-quality steel (lower phosphorus and sulfur content) and special high-quality steel.

Dear, hello, the difference between ordinary carbon steel and high-quality carbon steel in the process 1, the cost difference is a lot 2, the smelter method and processing technology are different, the raw materials of the smelter are the same, the difficulty coefficient of the impurity removal and purification process is very different, the process cost difference is also large, the machinery and equipment may be different 3, high-quality carbon steel to the pure steel direction. Pure steel - construction steel to the best limit! General carbon steel (many projects do not do requirements) High-quality carbon steel (there are certain regulations for the imitation of the age of things):

Manipulation of harmful impurities is not the same, harmful impurities include O, S, P, hard and simple harmonic movement, etc., the highest quality steel - pure steel Plum, the content of oxygen, sulfur and phosphorus is at the level of 5ppm, slightly worse at 10-15ppm, and the high-quality steel required by China's GB, the content of oxygen, sulfur and phosphorus is at the level of 20ppm, in fact, the fiber method without a cover is reached. 4. Other shortcomings of high-quality carbon steel are also less - the total number of defects on the surface of the channel steel, the size and length of microcracks, the uniformity of impurity distribution, the size and distribution of impurity particles, the hard and simple harmonic movement and distribution... 5. The composition, granularity, and distribution uniformity of other beneficial impurities are also different!

6. The size of the grains, the morphology of the crystals may also be different, and the uniformity of the mechanism is different.

Summary. Steel is a solid solution of iron-carbon alloy, or carbon in crystalline iron. The so-called carbon steel, that is, in addition to iron, generally only has five natural elements of carbon, silicon, manganese, phosphorus and sulfur in the material, and no other alloying elements are added.

Alloy steel is a steel in addition to iron and the five natural elements, but also artificially added other alloying elements to change or improve some characteristics of steel. Such as crnimnmowvb, etc. It can be understood that carbon steel does not contain other alloying elements; Steel that contains other alloying elements is alloy steel.

Steel is a solid solution of bent iron carbon alloy, or carbon element in crystalline iron. The so-called carbon steel, that is, in addition to iron, generally only has five natural elements of carbon, silicon, manganese, phosphorus and sulfur in the material, and no other alloying elements are added. Alloy steel is a steel in addition to iron and the five natural elements, but also artificially added other alloying elements to change or improve some of the bending characteristics of steel.

Such as crnimnmowvb, etc. It can be understood that carbon steel does not contain other alloying elements; Steel that contains other alloying elements is alloy steel.

According to its carbon content, excellent carbon steel is divided into low-carbon steel (referring to the low carbon resistance in Qingchun between 0 and 25%) and high-carbon steel (carbon content is greater than.

Carbon steel is an iron-carbon alloy with a carbon content. It is also called carbon steel. Generally, it also contains silicon, manganese, sulfur and phosphorus that are difficult to dismantle. Generally, the higher the carbon content in carbon steel, the greater the hardness, the higher the strength and the higher the degree of resistance, but the lower the plasticity.

1. Carbon steel is an iron-carbon alloy with carbon content.

It is also called carbon steel.

Generally, it also contains small amounts of silicon, manganese, sulfur and phosphorus. Generally, the higher the carbon content in carbon tartard-chain steel, the greater the hardness and the higher the strength, but the lower the plasticity.

2. Carbon steel can be divided into carbon structural steel according to its use.

There are three types of carbon tool steel and free-cutting structural steel, and carbon knot Yunchang structural steel is divided into two kinds of engineering construction steel and machine manufacturing structural steel.