There are four types of primer and film thickness primer: epoxy resin, polyester resin, acrylic resin and polyurethane resin. The primer is generally selected according to the bottom use of the product, the occasion of use, the degree of processing, and the matching of the top paint. The film thickness of the primer is usually 5um.

1. epoxy primer

It has good adhesion to the substrate, good water resistance, alkali resistance and chemical corrosion resistance, and is the earliest coil primer, and its flexibility is not as good as other primers.

2. polyester bottom

Good adhesion with the substrate, excellent flexibility, more sensitive to wet environment, chemical resistance is not as good as epoxy primer.

3. water-soluble acrylic primer

Good adhesion to the substrate, excellent flexibility, organic solvent content bottom, low temperature curing, not suitable for storage in a humid environment, high requirements for pretreatment.

4. polyurethane primer

It has chemical resistance, friction resistance, durability and good flexibility.

Type of finish and film thickness

The most commonly used topcoats are polyester, silicon modified polyester, polyvinyl chloride plastisol and polyvinylidene fluoride.

1) Polyester

Good adhesion, wide range of formability and outdoor durability, moderate chemical resistance.

2) silicon modified polyester

The hardness, wear resistance and heat resistance of the coating film are good, as well as good outdoor durability and non-powdering, gloss retention and flexibility are limited, and the cost is medium to high.

3) polyvinylidene chloride

With good formability and color retention, excellent outdoor durability and resistance to powder, solvent resistance, limited color, expensive.

4) polyvinyl chloride plastic sol

Excellent external durability and chemical resistance, damage resistance, beautiful, need special primer matching. The surface can have a smooth type for compression or automatic shrinkage type to form a pattern. The coating thickness is generally greater than 100um, in addition to plastisol, under normal circumstances, the coating thickness of the primer and top paint > =20um, the performance of its products can achieve the predetermined purpose.

Can be hot galvanized or cold galvanized

Galvanized pipe can be hot galvanized or cold galvanized.

Hot-dip galvanized pipe is the steel pipe immersed in high temperature molten zinc liquid to form a layer of solid zinc-iron alloy coating, which has high adhesion and can provide excellent corrosion resistance, while cold galvanized pipe is coated with a thin layer of zinc on the surface of the steel pipe by electrochemical method, the coating thickness is thin, and the corrosion resistance is relatively poor.

The coating of hot-dip galvanized pipe is thicker, generally reaching 50 to 120 microns, which can effectively block the erosion of external oxygen and water and provide a longer protective effect, while the coating of cold galvanized pipe is relatively thin, generally between 5 and 30 microns.

Galvanized pipe as a widely used material, its production and use in the process will indeed encounter some technical problems. Fortunately, as technology advances, there are solutions to these problems. At the same time, due to fluctuations in market demand, the price of galvanized pipes will also be affected to a certain extent, which is a common phenomenon in the market economy.

In the production process, steel leakage defect is a common problem. In order to reduce production costs and improve the strength of steel, manufacturers often add a higher proportion of silicon to steel-based materials. However, if the amount of silicon is too much, it will lead to an increase in the surface tension of the steel, which reduces the wetting ability of the steel plate to the zinc liquid and affects the galvanizing effect. In addition, silicon is easy to react with oxygen to produce silica at high temperatures, and if these acidic substances cannot be effectively removed, steel leakage defects will be formed during the galvanizing process.

In order to solve this problem, continuous hot-dip galvanizing process of hot-rolled steel strip without pickling can be adopted. This process is characterized by feeding the steel strip directly into the reduction furnace without going through the pickling step, and increasing the volume fraction of hydrogen to more than 20% to reduce the possibility of oxidation. At the same time, in the process of hot dip galvanizing, the adhesion of the coating can be significantly improved by forming Fe-Al-Zn alloy layer on the surface of the steel strip, so as to effectively eliminate steel leakage defects. These countermeasures are very worthy of reference for galvanized pipe manufacturers.

Another problem is the loss of the zinc layer, which is usually caused by the low heating value of the gas in the pentoxide furnace or the oxidation atmosphere caused by pressure fluctuations. In order to solve this problem, several countermeasures can be taken:

a. Choose a gas burner with better combustion performance to ensure that the pressure of air and gas is stable in an appropriate range;

b. Control the fluctuation range of gas heating value to ensure that its fluctuation does not exceed ±5%;

c. In the open flame heating, the temperature of the forge should be maintained above 1000℃;

d. If the forging furnace without burner preheating is used, its temperature should be maintained above 800℃;

e. The temperature of the strip steel when leaving the pentoxide furnace should be controlled below 650℃.

Through these measures, the zinc layer can be effectively prevented from falling off and the quality of galvanized pipe can be guaranteed. In short, although galvanized pipes may encounter some problems in the production and use of the process, but through scientific methods and technological innovation, these problems can be solved. At the same time, producers also need to pay close attention to market dynamics in order to better cope with the challenges posed by price fluctuations.

First, the difference between galvanized pipe and steel pipe

Galvanized pipe is a kind of pipe that covers the surface of ordinary steel pipe with zinc layer, which is characterized by good corrosion resistance and smooth surface. The steel pipe is not galvanized, and its surface anti-corrosion ability is weak and easy to be corroded.

Second, the durability of galvanized pipe and steel pipe comparison

1. Corrosion resistance

Because the galvanized pipe has been galvanized, it has good corrosion resistance and long service life; The untreated steel pipe is easy to be corroded and has a short service life.

2. Carrying capacity

The bearing capacity of the steel pipe is stronger than that of the galvanized pipe, because the surface of the steel pipe has no galvanized layer, and the material is relatively stronger.

3. Use environment

In wet environments, galvanized pipes are more durable than steel pipes because the zinc layer prevents moisture from entering the pipe, thereby protecting the pipe from damage.

In a dry environment, the life of the steel pipe is longer, especially in the absence of acid and alkali corrosion, and the service life is longer.

Third, how to choose galvanized pipe and steel pipe

1. Select according to the use environment

In humid environment, it is recommended to choose galvanized pipe; In a dry environment, steel pipe is recommended.

2. Select based on load requirements

If you need to carry a larger weight of items, it is recommended to use steel pipe, because it has a stronger load capacity.

3. Select based on the actual situation

Galvanized steel is a specially treated steel that is not magnetic, so it will not be attracted to magnets. This article will introduce in detail the definition of galvanized steel, the working principle of magnets and why galvanized steel can not be attracted by magnets.

First, let's understand the concept of galvanized steel. Galvanizing is a widely used method for corrosion protection of steel, which involves coating the surface of steel with a zinc material. The purpose of this is to prevent the steel from being corroded in the environment and extend its service life. Because galvanized steel has anti-corrosion, beautiful and acid and alkali resistance characteristics, it has a wide range of applications in the construction industry, automobile manufacturing, furniture production and other fields.

Next, we'll explore how magnets work. Magnets are objects made of materials containing magnetic elements such as iron, nickel, cobalt, and they have specific magnetic properties. Magnets are able to generate magnetic force because of the magnetic moment inside them, which is formed by the arrangement and combination of microscopic electrons in an external magnetic field. When a magnet approaches other objects, it creates a magnetic field around those objects, which in turn affects the microscopic electron configuration inside the objects, causing them to generate corresponding magnetic fields. This interaction between magnetic fields causes attractive or repulsive forces between objects.

However, galvanized steel is an exception, it is not attracted to magnets. The reason is that during the galvanizing process, the surface of the originally magnetic steel is coated with a layer of zinc, and iron atoms are combined with zinc atoms to form an alloy, which changes the magnetic properties of the steel and makes it lose its original magnetism. In addition, the physical properties of galvanized steel have also undergone some changes, such as its resistivity will increase and its heat conductivity will decrease. Therefore, although galvanized steel has a wide range of applications in the manufacturing industry, because it is not magnetic, it is not suitable for use as a magnet material.

In summary, although magnets can attract many types of metal, for galvanized steel that has been galvanized, magnets can do nothing. This phenomenon reveals the importance of a material's physical and chemical properties for its interaction with magnets.

Cold rolled steel coil is a kind of steel treated by cold rolling process, which has many excellent properties and wide applications. After the cold rolling process, it not only has a smooth surface, but also has high strength and ductility, which is suitable for various mechanical manufacturing and construction fields. The following will introduce the use of cold rolled steel coil and processing technology.

First, the use of cold rolled steel coil

1. Construction industry: Cold-rolled steel coils are often used in the manufacture of building structures. Such as steel structure buildings, Bridges, highway guardrail and so on. The high strength and excellent ductility of the cold-rolled steel coil make it able to withstand greater pressure and deformation, thus ensuring the structural stability and safety of the building.

2. Automobile manufacturing: Cold-rolled steel coil plays an important role in automobile manufacturing. It is usually used for the production of body, door, roof and other parts. Cold-rolled steel coil has high strength and toughness, which can effectively resist collisions and external shocks, and protect the safety of vehicles and passengers.

3. Electrical industry: Cold-rolled steel coil is widely used in the electrical industry, such as the manufacture of refrigerators, washing machines, air conditioners and other household appliances. Cold rolled steel coil has excellent corrosion resistance and electrical conductivity, making it an ideal material for electrical appliance manufacturing.

4. Furniture manufacturing: Cold-rolled steel coils also have great uses in furniture manufacturing. It is often used to make the skeleton and support structure of furniture. The high strength and durability of the cold-rolled steel coil make it able to withstand large loads and ensure the structural stability and service life of the furniture.

5. Other industries: Cold-rolled steel coil is also widely used in shipbuilding, railway equipment, petrochemical and other fields. Its corrosion resistance, high temperature properties and good machinability make it an indispensable material in these industries.

Second, the processing technology of cold rolled steel coil

1. Cutting: cold-rolled steel coils are often cut as needed during processing. Shearing refers to cutting the edge of a cold-rolled steel coil to the desired size and shape. Cutting can be done by means of mechanical cutting or laser cutting.

2. Crimp: During the processing of cold rolled steel coils, it is often necessary to crimp them into the desired shape. Crimp refers to the cold-rolled steel coil crimp into a cylinder, arc and other shapes. Crimping can be done by rolling or hydraulic pressure.

3. Bending: Cold-rolled steel coils can also be processed by bending. Bending refers to the deformation of the cold-rolled steel coil according to the desired bending Angle and curve. Bending is usually done using a bending machine or roll bending machine.

4. Welding: Cold-rolled steel coil in the process of processing, often need to be welded. Welding refers to joining together two or more parts of a cold-rolled steel coil. Usually using arc welding, gas welding and other methods for welding.

5. Surface treatment: cold rolled steel coils usually need surface treatment after processing. The surface treatment is to improve the durability and aesthetics of cold rolled steel coils. Common surface treatment methods are galvanized, spray, electroplating and so on.

DC01 cold carbon steel coil is a popular choice for a wide range of applications. It is favored for its low cost and excellent molding properties, so it is often used in the automotive industry and consumer goods manufacturing.

The versatility of the DC01 cold-rolled coil makes it suitable for a variety of applications, including but not limited to the following:

First, in the automotive industry, DC01 cold-rolled coil is often used to make automotive body panels. Its good formability makes the manufacture of body panels more efficient and precise, while also providing the required strength and durability.

Secondly, DC01 cold-rolled coil is also widely used in the manufacture of home appliance components. Due to its low cost and easy processing characteristics, it has become one of the preferred materials for many home appliance manufacturers. Whether it is a refrigerator, washing machine or air conditioner and other home appliances, DC01 cold-rolled coil can meet their manufacturing needs.

In addition, furniture components are also one of the important application areas of DC01 cold-rolled coil. Its low carbon steel properties allow furniture components to have sufficient strength and stability, while also providing the desired appearance. Whether it is a furniture component such as a bed frame, chair or table, the DC01 cold-rolled coil provides the ideal solution for manufacturers.

Finally, the DC01 cold-rolled coil is also widely used in the field of consumer electronics. Due to its low cost and ease of processing, it has become one of the preferred materials for many consumer electronics manufacturers. Whether it is a mobile phone, a tablet or a consumer electronics product such as a TV, the DC01 cold-rolled coil can provide the desired structure and appearance.

Overall, the DC01 cold-rolled coil is an excellent choice for many different applications due to its low cost and good formability. Whether in the automotive industry, home appliance manufacturing or furniture and consumer electronics, the DC01 cold rolled coil provides the ideal solution for manufacturers.

The cold-rolled coil is a steel plate with a thickness of less than 4mm, which is rolled at room temperature and below the recrystallization temperature. Because of the rolling at normal temperature, no oxide sheet is produced, so the surface quality of cold-rolled sheet is good, the dimensional precision is high, coupled with annealing treatment, its mechanical properties and technological properties are better than hot-rolled sheet.

Cold-rolled sheet is mainly used in the following fields:

Automobile manufacturing: Used to manufacture automobile body panels, wheel hubs, etc.

Electrical products: Used to manufacture electrical equipment such as motors and transformers.

Rolling stock: used to manufacture structural parts of railway vehicles, car body shells, etc.

Aviation: Used to manufacture aircraft parts, aircraft engines, etc.

Precision instrument: used to manufacture precision instrument structural parts, components, etc.

Food cans: used to manufacture the bottom cover of food cans, side seals, etc.

Construction: Used for the roof, exterior wall, doors and Windows of the building.

In the process of welding, cracks, pores or softened structures are easy to appear inside the molten core. Especially in the spot welding process of galvanized steel plate, if the welding specification is not reasonable, it may lead to some problems. First, some zinc and zinc-iron alloys may remain in the joint. These residues may form fine cracks or pores in the process of crystallization. This is because the high temperature during the welding process will cause physical or chemical reactions between zinc and zinc-iron alloys, which changes the physical properties of the molten core, making it more prone to cracks or pores. Secondly, if the residual zinc is more, it may also form softened tissue. This is because zinc reacts with the steel matrix during the welding process to form a zinc-iron alloy, which is lower in hardness and strength than steel, so it can lead to the softening of the molten core.

Galvanized pipe is a material that is often used in daily life. So, is this material made of iron or steel?

First of all, we need to make it clear that galvanized pipes are actually made of steel. This pipe is also known as galvanized steel pipe, which can be divided into two types: hot dip galvanized and electric galvanized. If it is a hot-dip galvanized pipe, the galvanized layer will be thick and uniform, so its service life will be longer. However, if it is electrically galvanized galvanized pipe, although its cost is lower, its surface is not particularly smooth, and its corrosion resistance is not as good as the former. Therefore, we recommend to try to choose hot-dip galvanized galvanized pipe.

Secondly, there are many galvanized pipe manufacturers sold on the market, and we need to understand the quality of the products when buying, so as to ensure that the quality is more guaranteed.

Next, let's talk about the difference between galvanized pipes and stainless steel pipes.

First of all, the meanings of the two are completely different. Galvanized pipe is made by welding, there are mainly two types of hot dip galvanized and electric galvanized. The stainless steel pipe is actually a long round steel.

Secondly, the scope of application of the two materials is also different. Galvanized pipe can be widely used in construction, chemical, electric power, automobile, bridge and other industries. The stainless steel pipe is mainly suitable for chemical, food, petroleum and other industries, in addition, it can also be used for the manufacture of some parts.

Finally, we need to pay attention to the following points when using galvanized pipes:

In the process of use, do not use sharp objects to knock on the surface, otherwise it may cause cracks. At the same time, try to avoid letting the material come into contact with easily corroded products to prevent corrosion.

When dealing with the gap between the pipes, the sleeve can be installed, generally the thickness of the sleeve is greater than 10 mm, and the gap is filled with insulation material.

What is carbon steel? Is it strong

Carbon steel is a very strong material, its strength and hardness are very high. Carbon steel refers to the steel whose mechanical properties depend on the carbon content in the steel, and generally do not add a large amount of alloying elements, sometimes known as carbon steel or carbon steel. Carbon steel, also known as carbon steel, refers to iron-carbon alloys with carbon content of less than 2% WC. In addition to carbon, carbon steel generally contains a small amount of silicon, manganese, sulfur, phosphorus and other elements.

According to different uses, carbon steel can be divided into carbon structural steel, carbon tool steel and free cutting structural steel three categories. Among them, carbon structural steel is divided into building structural steel and machine manufacturing structural steel two kinds; According to the smelting method can be divided into open hearth steel, converter steel and electric furnace steel; According to the deoxidation method can be divided into boiling steel (F), killed steel (Z), semi-killed steel (b) and special killed steel (TZ); According to carbon content, carbon steel can be divided into low carbon steel (WC ≤ 0.25%), medium carbon steel (WC0.25%-0.6%) and high carbon steel (WC> 0.6%); According to the content of phosphorus and sulfur, 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 extra high quality steel.

In general, in carbon steel, the higher the carbon content, the greater the hardness, the higher the strength, but the lower the plasticity. Therefore, when using carbon steel, it is necessary to choose the appropriate type and specification according to the specific situation.

What is the chemical composition of Alloy 600?

The chemical composition of Alloy 600 is as follows:

Nickel (Ni) : Minimum value is 72%

Chromium (Cr) : The minimum value is 14%, the maximum is 17%

Iron (Fe) : Minimum value is 6.0%, maximum value is 10.0%

Carbon (C) : A maximum of 0.15%

Manganese (Mn) : Maximum value is 1.0%

Silicon (Si) : The maximum value is 0.5%

Copper (Cu) : The maximum value is 0.05%

Aluminum (Al) : A maximum of 0.3%

Titanium (Ti) : A maximum of 0.3%

Boron (B) : Maximum value is 0.006%

Phosphorus (P) : Maximum value is 0.015%

Sulfur (S) : Maximum value is 0.015%

Alloy is a common material, but it has a disadvantage, that is easy to rust. In the process of wearing alloy jewelry, due to constant contact with oxygen and moisture in the air, the alloy will undergo chemical reactions, resulting in rust. If you do not take anti-rust measures, the alloy is particularly easy to rust. Therefore, in daily life, we must pay attention to the maintenance of the alloy to prevent rust.

Here are some suggestions for alloy maintenance:

1. avoid bumping: when wearing alloy jewelry, you should try to avoid collision between alloy and items with higher hardness. At the same time, do not randomly match high hardness jewelry for beauty, because it is easy to lead to alloy wear. It is best to use a single wear.

2. avoid exposure: When not wearing alloy jewelry, do not place it in a high temperature environment or in the sun. This will lead to the dull luster of the alloy surface, and the fading of the color will occur over time, affecting the beauty and value of the alloy.

3. avoid chemicals: When wearing alloy jewelry, it is best to avoid contact with facial cleanser, cosmetics, shower gel and other chemical products. Otherwise, a long time, easy to affect the surface color. Also, avoid contact with oil. When not wearing alloy jewelry, it should be properly put away.

Steel is an alloy, which belongs to the category of metal materials. Unlike single alloys and mixtures, steel is a structure composed of multiple alloying elements. After overheating or cold processing smelting, according to the required material, the required alloying elements can be added to form steel.

The chemical composition of steel can vary greatly. Steel that contains only carbon is called carbon steel or ordinary steel. In actual production, steel often contains different alloying elements according to different uses, such as manganese, nickel, vanadium and so on.

Alloy is a concept, usually refers to two or more kinds of metal elements or metal as a matrix to add other non-metallic elements through alloying process (such as melting, mechanical alloying, sintering, vapor deposition, etc.) and formed with metal properties of metal materials.

However, alloys may contain only one metallic element, such as steel. Steel is a general term for iron alloys with carbon content between 0.02% and 2.00% by mass percentage.

Here, we need to note that alloys are not mixtures in the general concept, and can even be pure. For example, in single-phase metal intercompound alloys, the added alloying elements can form solid solutions, compounds, and produce endothermic or exothermic reactions, thereby changing the properties of the metal matrix.

What is the material inside the hammer? The inside of the broken hammer is made of high chromium alloy. High chromium alloy is a kind of wear-resistant material with excellent anti-wear properties, but its toughness is low and brittle fracture occurs. In order to make the high chromium alloy hammer work normally, the structure of the hammer is generally adopted.

The first is to use a large area hammer to support the high chromium hammer head, and the toughness of the hammer handle supports the huge impact force during the crushing process.

The second is a dual-hydrothermal composite material, The material uses different optimal combinations of chromium, molybdenum, copper, nickel, vanadium, titanium and other alloys and rigorous unique production process, set high chromium alloy casting excellent wear resistance, high temperature oxygen resistance, thermal fatigue resistance (or corrosion resistance) and cast steel good toughness and machinability and one, with a single metal material is difficult to achieve excellent wear resistance and impact resistance of the overall comprehensive performance.

The high chromium wear-resistant hammer is the raw material of the ordinary crusher hammer, which is loaded with heavy elements of chromium metal. The grain is refined after the metamorphic treatment during melting, and the next pouring molding is carried out in the negative pressure state. The high chromium cast iron material used in the head of the hammer has high density, can withstand the larger impact load, and has sufficient anti-wear performance. The hammer handle is made of low alloy steel with good toughness, good toughness and no fracture to ensure normal operation.

High chromium wear-resistant hammer is mainly used to break some stones with high hardness, such as basalt, granite, river pebbles and so on. With the strengthening of the infrastructure construction project, the development trend of mining machinery industry is becoming more and more prosperous, and the crusher equipment has been a relatively rapid comprehensive development, and the amount of the hammer head of the main parts of the crusher has increased.

It is said that in the first World War in 1914, Britain, France and Germany launched a fierce battle, it is not so advanced weapons, the quality of British soldiers rifles is not good, often used after particularly easy to wear, so at that time want to create a new gun, but the material is particularly expensive, the British government is very headache, decided to re-develop a new bore resistant to wear.

This task was given to Brearley, who was a famous metal expert in Britain at that time, when he received the task, he began to study, a long time passed, but Brearley's development work did not make substantial progress, in the corner of the laboratory, all kinds of discarded steel piled up into a hill. Brearley regained his confidence. He decided to clean up the lab for new experiments.

Suddenly, a researcher cried out, "Why is this alloy steel silver shiny, shiny, there is no rust?" "It does not rust, indicating that it is not easily corroded by air, so what is it easily corroded by?" It turned out to be chrome, which Brearley eliminated because it wasn't hard enough to wear out easily. So if you can't do guns, what can you do? It is also the function of waste utilization, and finally made into knives and forks, which is the source of stainless steel.

Brearley's invention of stainless steel in 1916 obtained a British patent and began mass production, so far, from the trash accidentally found stainless steel has become popular around the world, Brearley is also known as the "father of stainless steel."

Hot-dip galvanized channel steel, also known as hot-dip zinc channel steel and hot-dip galvanized channel steel, is an effective way to prevent metal corrosion. It is to immerse the channel steel after rust removal into the melting zinc liquid about 440~460℃, so that the surface of the channel steel is attached to the zinc layer, so as to play the purpose of anti-corrosion.

Zinc-steel balcony guardrail has the following characteristics:

1. welding free assembly design, quick and simple installation.

2. four layers of anti-corrosion treatment, more than 20 years of service life, to solve the traditional products in a short time of rust, powder, cracking and other problems, eliminating product maintenance and update costs.

3. good decorative, rich color, to meet the individual needs of different customers.

4. environmental protection, does not pollute the environment, to solve the problem of ordinary products polluting buildings.

5. good flexibility, the rigidity and flexibility of the substrate make the guardrail products have better impact resistance.

6. electrostatic spraying of the surface of the imitation pond porcelain process, so that the guardrail products have good self-cleaning performance, rain wash and water gun spray can be clean as new.

7. buried installation mode and foot plate installation, that is, save your building foundation costs, but also save land resources.

8. good weather resistance, salt spray resistance and moisture and heat resistance, suitable for use in different regions. Steel stamping accessories, stamping guardrail accessories 32t connector 35t connector 40t connector 45t connector U-card 30*40LN bracket 35LN bracket 40 several brackets ð

1. Classification by thickness: 

(1) thin plate 

(2) medium plate 

(3) thick plate

(4) extra thick plate

2. according to the production method classification:

(1) hot rolled steel plate 

(2) cold rolled steel plate

3. according to the surface characteristics of the classification: 

(1) galvanized sheet (hot galvanized sheet, galvanized sheet) 

(2) tinplate

(3) composite steel plate 

(4) color coated steel plate

4. classified by use: 

(1) bridge steel plate 

(2) boiler steel plate 

(3) shipbuilding steel plate 

(4) armor steel plate 

(5) automobile steel plate

(6) Roof steel plate

(7) Structural steel plate 

(8) electrical steel plate (silicon steel sheet) 

(9) spring steel plate 

(10) other

304 stainless steel plate and Q345 carbon steel plate can be welded. The welding of stainless steel and Q345 belongs to the welding between low carbon steel and austenitic stainless steel in this kind of dissimilar steel welded joint, due to its working conditions have intergranular corrosion and stress corrosion problems, usually choose E309 type welding material, but when the welding joint is in a higher temperature environment (design temperature ≥315℃), In order to prevent the migration of carbon during the working process, welding materials with a high nickel alloy content (such as InCONel 182 electrode, etc.) are usually used.

The difference between carbon steel pipe and seamless steel pipe:

1. Seamless steel pipe is a steel pipe without weld made by perforating hot rolling method.

Sometimes it is necessary to further cold work the pipe after hot working in order to get the corresponding shape and size.

The carbon steel pipe is generally made of round, square, flat and other shapes after multiple rolling.

2. Seamless steel pipe is the most used pipe in petrochemical production equipment today.

Carbon steel pipes are more widely used.

At the same time, carbon steel pipe is the main requirement of its chemical composition is the content of carbon, seamless steel pipe is a large type, referring to seamless steel pipe, a wide range.