Overview of 201 J1 stainless steel tube

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Introduction

Since the birth of 201 stainless steel, there are many types of J series products. Among them,  201 J1 stainless steel tube is one of them.

Moreover, the J series has no clear mark. So, sellers can easily pretend to mix them with other categories.

In this way, consumers cannot recognize it easily.

And, this affects the acceptance and recognition of the entire product in 201.

Therefore, this article explains the differences in J series materials.

Moreover, this allows people to better understand the 201 J1 stainless steel tube.

201 J1 stainless steel tube

What is the 201 J1 stainless steel tube

200 series stainless steel was born during World War II. Moreover, it is a substitute for the 300 series.

In India, where manganese resources are abundant and nickel resources are lacking, 200 series stainless steel has been well developed.

And the 201 stainless steel tube is also one of the product types.(You can check 201 stianless steel here Overview of 201  stainless steel pipe.

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It has acid and alkali resistance.

Moreover, its density is very high.

Meanwhile, after people polished it, it has no bubbles or pinholes. Therefore, people often use it to produce all kinds of watch cases and strap backs.

Moreover, it is also a raw material for decorative tubes, industrial tubes and some shallow stretched products.

There is no national standard for 201 stainless steel. Due to the different compositions of 201 stainless steel used in different fields, it has five types: J1, J2, J3, J4, and J5.

Next, let’s look at these types one by one.

J1

  1. Composition: Its carbon content is slightly higher than the J4. Moreover, its copper content is slightly lower than the J4.
  2. Processing performance: Its processing performance is not as good as J4. Therefore, it is suitable for ordinary shallow drawing, deep drawing, and large angle products. For example, decorative panels, bathroom products, sinks, product pipes, etc.

J2、J5

When people use J2 and J5 to make decorative tubes, simple decorative tubes can be more beautiful.

However, it is easy to burst if J2 and J5 are used for square pipes or elbows.

Similarly, when people use J2 and J5 to make flat plates, its hardness is relatively high, so the surface is beautiful. Moreover, it can realize various surface treatments. For example, frosting, polishing, plating, etc.

However, its ductility is not very good. Moreover, when people bend them, it breaks easily.

J3

201 J3 is stainless steel with high carbon, low chromium, and low copper.

Similarly, because of its high carbon content and low copper content, it is harder stainless steel.

Therefore, it is not suitable for strong bending.

Compared with 201 J1 stainless steel, its ductility is not so good.

Moreover, in the same environment, it is more prone to rust

However, some narrow belts do not require high corrosion resistance and deform-ability. At this time, J3 stainless steel is very suitable.

Moreover, this can reduce the cost of raw materials for enterprises. Therefore, companies like to use J3 stainless steel.

Besides, J3 is suitable for decorative tubes that are not difficult to process.

Secondly, it is also suitable for 90-degree sink material.

J3

J4

J4 is the high-end variety in the J series.

It is suitable for sinks, kitchenware, bathroom products, and door hinges.

By far, we have already understood the product differences of the 201 J series.

So, what are stainless steel tubes?

What is a 201 stainless steel tube?

Stainless steel pipe is a hollow long round steel.

And It is widely used in industrial pipelines and mechanical structural parts such as petroleum, chemical, medical, food, light industry, mechanical instrumentation, etc.

However, there is still a difference between the stainless steel tube and the stainless steel pipe.

Stainless steel tubes are mostly thin tubes. Moreover, people mainly use it in pipeline transportation.

And people mostly use stainless steel pipe to make accessories. Or, people use pipes in engineering.

The function and utility of various main elements in stainless steel

Stainless steel is an alloy.

To understand its role and performance, we must first understand its ingredients.

Thus, let’s take a look at what ingredients are in stainless steel.

Nickel

It changes the crystal structure of steel.

Moreover, Nickel is a good corrosion-resistant material. Therefore, it can increase the strength of steel.

Meanwhile, it can keep the steel good plasticity and toughness.

nikel

Carbon

Carbon can increase the strength of stainless steel. Correspondingly, the higher the carbon content, the higher the strength of the stainless steel.

Although carbon can increase the strength of stainless steel, it harms corrosion resistance.

When the corrosion resistance is high, people will use stainless steel with lower carbon content.

However, when the corrosion resistance is high, people will use stainless steel with lower carbon content.

Generally speaking, the carbon content in this situation is below 0.03%.

Chromium

The combination of chromium and oxygen can produce a corrosion-resistant Cr203 blunt film.

Therefore, it is the basic component of stainless steel.

Generally speaking, the passive state of stainless steel requires more than 12% chromium.

Moreover, the increase in chromium content can also improve the corrosion resistance of stainless steel.

Phosphorus and Sulfur

Phosphorus and sulfur harm the corrosion resistance and stamping properties of stainless steel.

Therefore, they are harmful elements in stainless steel.

Copper

Copper can increase the corrosion resistance of stainless steel to non-oxidizing acids.

Moreover, it can reduce the sensitivity of stainless steel to pitting corrosion.

Therefore, it makes 201 J1 stainless steel tube better in plasticity and cold working performance.

The above is the main alloy composition of stainless steel.

Below, let’s take a look at the comparison of J series stainless steel.

copper

J series comparison

Regarding the comparison of J series stainless steel, first of all, in terms of appearance, they are not much different.

The main reason is that their chemical composition is different. Moreover, the key is the content of carbon, chromium, and copper.

Meanwhile, there is no big difference between the composition of nickel and chromium in the J series.

However, the difference between their carbon content and copper content is the most obvious:

Copper content: J4>J1>J3>J2>J5.

Carbon content: J5>J2>J3>J1>J4.

Therefore, their performance and price will be different:

Hardness: J5, J2>J3>J1>J4

The order of prices from high to low is J4>J1>J3>J2, J5.

Knowing this, let’s take a look at the 201 J1 stainless steel tube.

The production process of 201 J1 stainless steel tube

The production steps of stainless steel seamless pipe:

  1. Use high-quality 304, 316L stainless steel raw material pipes to be empty, headed, and annealed.
  2. Then, people will cold-roll it many times. The cold-rolling of the pipe is carried out on a multi-roll mill. After cold rolling, the yield coefficient of the stainless steel tube is relatively large, and it is not easy to expand or bend.
  3. Therefore, to reach the sanitary standard of 201 J1 stainless steel tube. People also need to demagnetize, pickle, and straighten stainless steel pipes.
  4. Meanwhile, when pickling passivating, people can remove oil stains, rust spots, welding spots, oxide layers, free iron, and other dirt on the surface of the workpiece.

Moreover, the treated surface is uniform silver-white.

Besides, it can also prevent metal corrosion, hydrogen embrittlement, and acid mist.

  1. Then, people will polish 201 J1 stainless steel.
  2. After people finish the above steps, they will carry out a quality inspection on stainless steel.

First, people perform internal flaw detection on polished stainless steel pipes with metal flaw detectors.

Then, the steel pipe quality inspector will manually select qualified stainless steel.

At this time, people can pack qualified products and leave the factory.

The above is the production process of 201 J1 stainless steel.

Then, after careful production, let’s see what performance it has.

high quality

Advantages of 201 J1 stainless steel tube

First of all, due to its high hardness, it is very suitable for heavy-duty applications.

Moreover, it has good corrosion resistance. Therefore, the maintenance it requires is minimal. Meanwhile, its service life is also very long.

Compared with the 304 stainless steel pipe, it has oxidation resistance. Therefore, people can use it in high-temperature conditions with a continuous temperature of 1200 degrees.

However, it also has some disadvantages.

Disadvantage

Because of the high chromium content and low nickel content cannot reach a balance, people will reduce its cadmium content to 15%-16%.

Therefore, its corrosion resistance is not as good as other similar stainless steel tubes.

Moreover, Manganese and copper reduce their passivate ability. Therefore, under acidic conditions, crevice corrosion often occurs.

Even so, its application is still very extensive.

Application of 201 J1 stainless steel tube

In the transportation of various liquids and fluids, people make good use of its pipeline advantages.

Moreover, it has strong corrosion resistance.

Therefore, the 201 J1 stainless steel tube is widely used in oil refineries, chemical processing, and food transportation.

Next, let’s see how to buy it.

application

How to buy 201 J1 stainless steel tube?

Many people with the right distance will go directly to the manufacturer to see the goods.

Next, let’s take a look at the specific situation.

Look at the manufacturer area about 201 J1 stainless steel tube

When visiting a manufacturer, people generally look at the construction management of an industrial zone.

The key is to look at the production workshop.

If the manufacturing place is messy, then the goods are not good either.

Besides, when people buy a 201 J1 stainless steel tube, they go back to the warehouse.

Generally, there is a lot of warehouse management, so there will have mixed pipe problems when delivery.

So, when people go to buy, they should look for factories with orderly production and convenient warehouse management.

See product quality

On the production line, you can easily see whether the 201 J1 stainless steel pipe is smooth, whether the welding is smooth, and how polished.

In this way, the buyer himself has a clear understanding of the quality of the product.

Things you need to pay attention to about 201 J1 stainless steel tube

  1. The anti-rust treatment of stainless steel should be Sa2.5 in GB/T8923. Moreover, the depth of its surface anchor pattern is 40μm to 100μm.
  2. The residual rust and dust on the surface of the 304 stainless steel pipe should be clean
attention

Conclusion

Since the birth of 201 stainless steel, there are many types of J series products, of which 201 J1 stainless steel tube is one of them.

Like other types of stainless steel, it is also an alloy composed of the following components:

  1. Nickel: Ni is a good corrosion-resistant material.
  2. Carbon: Carbon can increase the strength of stainless steel.
  3. Chromium: The combination of chromium and oxygen can produce a corrosion-resistant Cr203 passivate film.
  4. Phosphorus and sulfur: they are harmful elements in stainless steel.
  5. Copper: Copper can increase the corrosion resistance of stainless steel to non-oxidizing acids.

Moreover, its carbon content is slightly higher than the J4. Moreover, its copper content is slightly lower than the J4.

First of all, due to its high hardness, it is very suitable for heavy-duty applications.

Moreover, it has good corrosion resistance.

Therefore, the maintenance it requires is minimal.

Meanwhile, its service life is also very long.

As for its performance, its corrosion resistance is not as good as other similar stainless steel tubes.

Moreover, Menghe copper reduces its passivation ability. Therefore, under acidic conditions, crevice corrosion often occurs.

For its application, in the transportation of various liquids and fluids, people make good use of its pipeline advantages.

Above all is the specific introduction of the 201 J1 stainless steel tube.

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