201 stainless steel pipe is the most common type of 200 series stainless steel pipe.
Moreover, it has a wide range of applications.
However, its appearance does not look much different from other stainless steels.
So, how to identify 201 stainless steel pipes?
So, let’s start with what 201 stainless steel pipes are.
201 stainless steel is the material that people use to make 201 stainless steel pipes.
Then, what is 201 stainless steel?
201 stainless steel is an Austenitic Cr-Ni stainless steel developed to protect Ni.
Moreover, it is non-magnetic under the condition of the return. However, by cold processing, it can become magnetic and has high strength.
Because there is a lot of Cr in 201 stainless steel, it has high corrosion resistance.
Meanwhile, it has an acid and alkali resistance.
Moreover, it has no pinholes and high density.
Therefore, people often use it to produce various watch cases, straps, back covers, etc.
And its main purpose is to make some shallow stretched products such as decorative tubes and industrial tubes.
In many applications, 201 stainless steel can be used to replace 301 stainless steel.
201 stainless steel pipes are production process. People use machines to make stainless steel plates into stainless steel tubes.
Meanwhile, it is acid and alkali resistant.
This are 201 stainless steel pipes.
People heat round billets. Then, it passes through piercing-round tube blank → heating → piercing → three-roll cross rolling, continuous rolling or extrusion → tube stripping → sizing (or reducing diameter) → cooling → billet tube → straightening → hydraulic test (or flaw detection) ) → marked processing program.
In this way, people can put hot-rolled stainless steel pipes into storage.
China’s stainless steel pipe production has gone through more than 40 years of development. Therefore, the production technology of stainless steel has been improving.
As a result, their output and quality are constantly improving. Meanwhile, the quality of a few products has reached the international advanced level.
Next, let’s take a look at the performance of the 201 stainless steel pipes.
The performance of the stainless steel pipe is based on the performance of 201 stainless steel.
So, let’s take a brief look at the performance of 201 stainless steel.
Austenitic stainless steel contains elements such as nickel and molybdenum. They have a great strengthening effect on the steel matrix.
Therefore, the high-temperature strength and deformation resistance of 201 stainless steel is higher than all other steels, generally more than 50% higher.
However, its high-temperature plasticity is much lower.
At present, most of the stainless steel pipes must be cold-rolled or cold drawn to obtain products that meet the requirements of use.
Therefore, the cold deformation performance of stainless steel is particularly important.
Among all types of stainless steel, Austenitic stainless steel has the best cold deformation performance.
And 201 stainless steel is one of the Austenitic stainless steels.
But despite its deformation resistance and work hardening tendency, its plasticity of the cold process is quite good.
As long as the capacity of the cold processing equipment is sufficient, it can withstand a large amount of deformation. Generally, it can reach more than 60% of the relative deformation.
First, let’s take a look at its hardness.
Regarding the hardness of 201 stainless steel pipes, it isn’t the harder the better.
201 stainless steel pipe contains nickel, chromium, copper, carbon, sulfur, phosphorus, manganese, silicon, and other metal elements.
Among them, the hardness of the stainless steel tube is determined by carbon.
Because the main characteristic of carbon is to make the object hard, and the hardness of the stainless steel tube will increase with the increase of carbon content.
However, carbon is also an impurity in stainless steel.
So the more the content, the harder, the more likely the pipe will rust.
Meanwhile, it’s welding, cold bending, and corrosion resistance have also significantly decreased.
It refers to the ability of stainless steel pipes to resist plastic deformation and fracture under external force. Generally it’s 100,000 to 180,000 psi.
It refers to the large positive pressure on the broken section of the stainless steel pipe under the action of the concentrated load located between the two supports.
And it is generally 50,000 to 150,000 psi.
201 stainless steel pipe has good form-ability, corrosion resistance, and manufacture-ability.
Moreover, 201 stainless steel pipe has the characteristics of acid resistance, alkali resistance, high density, and no pinholes.
Usually, people use it to produce high-quality materials for various watch cases and watchband bottom covers.
Then, what are the types of stainless steel pipes?
There are many ways to connect stainless steel pipes.
Therefore, their types will also be different.
Moreover, their connection principles are different. Therefore, their scope of application is also different.
Besides, the density of different types of stainless steel pipes is also different. Therefore, the weight of stainless steel pipes of the same diameter will vary a lot.
Next, let’s take a look at the specific types of stainless steel pipes.
Stainless steel seamless pipe is a long strip of steel with a hollow section and no joints on the periphery.
Moreover, the thicker its wall thickness, the more economical and practical it is. Meanwhile, its processing cost will rise substantially.
Besides，201 stainless steel seamless pipe is resistant to weak corrosive media such as air, steam, water, and chemically corrosive media such as acid, alkali, and salt.
Therefore, people also call it a stainless and acid-resistant steel pipe.
Then, what are its pros and cons?
The seamless 201 stainless steel pipe embodies its superiority in terms of high pressure, high strength, and mechanical structure. Therefore, it is very durable.
Moreover, the seamless 201 stainless steel pipe is a ring-shaped part.
Therefore, it can increase the utilization rate of materials, simplify the manufacturing process, and save materials and processing time.
Compared with other steel pipes, seamless pipes of the same strength are lighter.
Moreover, compared to welded pipes, seamless steel pipes have no welds on the outer surface.
The above are its main advantages.
However, the production process of this product makes its performance somewhat limited.
General seamless stainless steel pipes have low precision, uneven wall thickness, low brightness on the inner and outer surfaces of the pipe, and high cost of sizing.
Moreover, there are some black spots and pits on its inner and outer surfaces. It is not easy for people to remove these black spots and pits. Therefore, its detection and shaping must be processed offline.
According to specific requirements, these shortcomings do not affect the use in many cases.
Nowadays, Chinese technology for making seamless pipes is very mature. Therefore, its use is very common.
Generally, people use seamless 201 stainless steel pipes in industries such as petroleum, chemical, medical, food, light industry, mechanical instrumentation, and other industrial pipelines.
In addition, in the case of the same degree of bending and torsion resistance, the weight of a seamless 201 stainless steel pipe is relatively light. Therefore, it is also widely used in the manufacture of mechanical parts and engineering structures.
For example, people often use it to produce various conventional weapons, barrels, and shells.
201 stainless steel welded pipe is a steel pipe made by welding the steel strip after crimping it with a unit and a mold.
And, its production process is cold forming.
With the development of high-quality steel coil production technology and welding inspection technology, the quality of welds continues to improve. Therefore, the varieties and specifications of welded steel pipes are increasing day by day.
Moreover, 201 stainless steel welded pipe has a simple production process, high production efficiency, many varieties and specifications, and a few types of equipment.
However, its general strength is lower than the seamless 201 stainless steel pipe.
Moreover, 201 stainless steel welded pipes have replaced seamless steel pipes in more and more areas. Such as pipes for heat exchange equipment, decorative pipes, medium and low-pressure fluid pipes, etc.
Next, let’s take a look at its performance.
The strength of the 201 stainless steel welded pipe is very high.
Moreover, it has a long service life.
Besides, its installation is also very simple.
201 stainless steel protection pipe is a stainless steel hose.
People usually use it as a protective tube for wires, cables, and wires of automatic instrument signals.
Moreover, its specifications are 3mm-25mm. Meanwhile, the inner diameter of the ultra-small diameter stainless steel hose is 3mm-25mm.
Besides, people mainly use this 201 stainless steel protection tube to protect the sensor line of the precision optical ruler and industrial sensor line.
As for its performance, it has good flexibility, corrosion resistance, high-temperature resistance, and abrasion resistance.
Moreover, customers can customize their size.
201 stainless steel high-temperature pipe can withstand a high temperature of 300 degrees.
Moreover, for stainless steel, their different contents of Ni and Cr lead to the different high-temperature resistance of stainless steel.
However, few places need stainless steel withstanding high temperatures in daily life. Even when boiling water, the highest temperature is 100 degrees. Therefore, people rarely use stainless steel high-temperature pipes.
201 stainless steel precision pipe is a high-precision steel pipe material made by cold drawing or hot rolling.
So, what is cold treatment and heat treatment?
Let’s take a look at these two production processes together.
The chemical heat treatment of precision cold drawn pipe manufacturers means that metal or alloy workpieces are kept in an active medium at a certain temperature.
This allows one or several elements to penetrate its surface.
So, this changed its chemical composition, organization, and performance.
Common chemical heat treatment processes are: carburizing, carbonitriding, aluminizing, boronizing, etc.
The purpose of chemical heat treatment: mainly to improve the hardness, wear-resistance, and corrosion resistance of the steel surface.
Cold drawn steel pipe is a whole steel pipe produced by drawing, extrusion, perforation, and other methods.
Therefore, there are no seams on its surface.
Choosing precision seamless pipes to manufacture mechanical structures or hydraulic equipment can greatly save machining man-hours, increase material utilization.
Meanwhile, it helps improve product quality.
Because there is no oxide layer on the inner and outer walls of the it, it can withstand high pressure.
Moreover, its finish and precision are very high.
Therefore, the cold bending process will not deform and flared.
Even if people squashed it, it has no cracks.
Therefore, people mainly use it to produce pneumatic or hydraulic components.
Moreover, the mechanical structure of hydraulic equipment made of precision its pipes can be used to save processing time and improve material utilization.
Meanwhile, it also helps to improve the quality of the products.
In general, its advantages make it very practical.
The 201 stainless steel capillary pipe is a stainless steel tube with a length of 1-6m and an inner diameter of 0.5-2mm.
So, what does the capillary do?
Because water is viscous, water molecules stick to each other on other objects. Therefore, these objects can be used as glass, cloth, or soil for organ tissues.
The thinner the capillary, the less susceptible it is to air pressure when it absorbs water.
Moreover, in the case of being perpendicular to the water surface, the thinner the capillary, the stronger the absorption.
Its length and pipe diameter can have many combinations. This can meet the requirements of different working conditions and different refrigerant devices.
However, once people have selected the its capillary combination, it cannot change with the load.
Generally, people will choose representative designs and combinations to make refrigeration devices operate efficiently most of the time.
Let’s take a look at how people use them.
201 stainless steel pipe is widely used in petroleum, chemical, natural gas, nuclear, paper, and national defense development industries.
Moreover, the surface of the its pipe is polished. And its polishing granularity is 600-1200. This is suitable for the construction industry. Moreover, it plays an important role in the aesthetics and performance of buildings.
Now, let’s review what we’ve said.
It is an Austenitic Cr-Ni stainless steel developed to protect Ni.
Moreover, it is non-magnetic under the condition of the return. However, by cold working, it can become magnetic and has high strength.
It is a production process.
People use machines to make stainless steel plates into a stainless steel pipe.
Meanwhile, it is acid and alkali resistant.
There are many ways to connect stainless steel pipes. Therefore, their types will also be different. Moreover, their scope of application is also different.
Generally, 201 stainless steel is divided into the following categories:
As for its usage, it is widely used in the petroleum, chemical, natural gas industry, nuclear industry, paper industry, construction industry, and defense development industry.
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