What type of stainless steel is J1 or J4 stainless steel and how did J1 and J4 come from?

200 series austenitic stainless steel.

It belongs to the Indian standard, there is no Indian standard in the material manual, so you can't find it, 201, 202, j1, j3, j4 because ** is cheaper than 304, so it is very popular in China, I hope this is useful to you.

J stands for Japan, and the mark is Japanese and is a grade lower than 304 stainless steel.

Quote from Encyclopedia --- 201 stainless steel.

There are mainly the following 200 series steel grades in China: J1, J3, J4, 201, 202. Later, there were 200 steel grades with lower nickel content control, as for 201C, it was the extension of 201 steel grades developed by individual steel mills in China in this later period, and the national standard grade of 201 was:

1Cr17Mn6Ni5N,201C continues to reduce the nickel content and increase the manganese content on the basis of 201.

The 200 series stainless steel was first developed in the United States during World War II as a substitute for the 300 series stainless steel. At that time, due to the war, nickel as a strategic material was strictly controlled by the relevant countries, and the amount of nickel in the United States was seriously insufficient. In order to solve the problem of stainless steel production and production in the case of serious shortage of nickel, the United States has developed this new series of austenitic stainless steel grades with manganese instead of nickel.

After the end of World War II, the first situation of nickel in the United States gradually improved, therefore, the production of 300 series stainless steel is no longer restricted by the shortage of raw materials, so the 200 series has not been greatly developed. After returning to India, several Indians who participated in the development of 200 series stainless steel brought back to India the stainless steel varieties of 200 series steel developed in the United States, starting from the fact that India is relatively rich in manganese resources and lacking nickel resources.

The success of 200 series stainless steel in India is due to the potential to replace 304 stainless steel in some specific applications, and most of the 200 series stainless steel sold in the Chinese market has almost no control of sulfur and carbon content in accordance with the national standard, and some or all nickel is replaced by manganese (and nitrogen) to produce austenitic stainless steel with lower nickel content.

The disadvantage of this series of materials is: 18% chromium content and low nickel content are not balanced and ferrite is formed, for this reason, the chromium content in 200 series stainless steel is reduced to 15% 16%, and in some cases to 13% 14%, its corrosion resistance is not comparable to 304 and other similar steels In addition, under the acidic conditions common to the corrosion sites of the deposition zone and crevices, manganese and in some cases copper reduce the effect of repassivation. 200 series steels are destroyed about 10-100 times faster than 304 stainless steel under these conditions.

In addition, the residual sulfur content and carbon content of these steels are often not controlled in production, and the materials cannot be traced back to the source, even in the use of materials. If CR-MN steels are not accounted for, they can become a dangerous scrap blend, resulting in castings containing unexpectedly high manganese contents.

It is food grade stainless steel.

Basically, all the stainless steel we can see on the market is food grade.

J4 steel stainless steel is a nickel-saving type of chromium-manganese stainless steel, which is equivalent to the American AISI200 series stainless steel, with a large application volume and a wide range of applications.

The corrosion resistance of stainless steel decreases with the increase of carbon content, therefore, the carbon content of most stainless steels is low, and the maximum is not exceeded, and some steels even have a C (carbon content) lower than e.g. 00Cr12).

The main alloying element in stainless steel is CR (chromium), and only when the CR content reaches a certain value, the steel is corrosion-resistant. Therefore, stainless steel generally has a cr (chromium) content of at least. Stainless steel also contains elements such as Ni, Ti, Mn, N, Nb, Mo, Si, and Cu.

J4 stainless steel welding method.

First of all, it is necessary to clean the weld seam of the weld and remove the oil and water left behind. The shielding gas argon should be pure, so that the welding effect is free of color difference. Try to minimize the gap between the weldments, and the tighter the better.

If you want to use welding wire filling, the welding wire must be thin. The current should be small, small enough to melt the welding wire, and the pulse current of the cold welding machine should be less than 20.

How to choose a welding cold welding machine is also particular, generally choose an energy storage pulse type thin plate cold welding machine like a raw cold welding machine, the current is relatively stable.

Although such a cold welding machine is a little more expensive, the welding effect is obvious to all. At the beginning, the welding technique is not skilled enough, and the effect cannot come out, but practice makes perfect, just practice more.

What type of stainless steel is J1 or J4 stainless steel and how did J1 and J4 come from?

Stainless steel J3 and J4 are different steel grades of stainless steel 200 series. There are also J in 200 series steel grades. There are mainly the following 200 series steel grades in China:

J1, no Serino J3, J4, 201, 202. Later, there was a lower control of nickel content of 200 and other steel grades, as for 201C, it is in this later period of China's individual steel mills to develop the extension of 201 steel grade, 201 national standard grade: 1Cr17Mn6Ni5N, 201C on the basis of 201 continue to reduce the content of nickel sparrow, increase the content of manganese.

200 series of austenitic stainless steel, belongs to the Indian standard, 201, 202, J1, J3, J4 because of the low price of 304, so it is very popular in China, 200 series stainless steel is in the World War II period, in order to solve the problem of serious shortage of nickel in the production and production of stainless steel, the United States has developed this new series of austenitic stainless steel with manganese instead of nickel. I think it's useful, give it a thumbs up.

304J1 is 304 copper-containing material, mainly used for deep processing purposes, also belongs to the nickel-saving series, in the first half of 2008 Zhangjiagang POSCO was successfully developed and put into the production of 304J1 modification, compared with the traditional 304 and 304J1 has more nickel-saving advantages, now, with excellent performance and advantages, in the market has been praised by a large number of merchants. However, some businesses are inevitably worried about whether their nickel savings will affect their performance.

The performance difference between 304 stainless steel and 304J1 stainless steel.

1. There is no big difference between the appearance surface and the previous 304J1 of the mold, and there is no big difference between it and 304;

2. With the reduction of Ni content, the deep processing performance must not be comparable with the original 304J1.

Due to the fact that this material has just been successfully developed and put into the market for a short time, the market has not yet reacted much to the performance of various use properties, especially in terms of corrosion resistance.

To sum up, if the user is purchasing deep-drawing materials, then it is less suitable to choose the 304J1 modification. For other uses, customers can try it out.

Stainless steel J3 and J4 are different steel grades of stainless steel 200 series. There are also J in 200 series steel grades.

Stainless steel is divided into five categories according to its metal structure: austenitic stainless steel, ferritic stainless steel, austenitic ferritic (duplex) stainless steel, martensitic stainless steel and precipitation hardening stainless steel. A large number of stainless steel is circulated on the market, which is mainly austenitic stainless steel for the production of building components, decorative parts, vehicle structures, guardrails, household appliance components and shells, newspaper kiosks, kiosks, catering utensils, medical appliances, etc. Coupled with a large number of industrial uses, the production (or consumption) of austenitic stainless steel accounts for about 75% and 80% of the total production (or consumption) of stainless steel.

Chromium-manganese (200 series) austenitic stainless steel is based on chromium-nickel austenitic stainless steel, adding manganese and/or nitrogen to the steel instead of precious metal nickel elements and developing, its austenitic elements, in addition to manganese, there is also nitrogen, generally there is an appropriate amount of nickel (4% 6%). Manganese in steel plays a role in stabilizing austenite. Due to the strong formation and stabilization of austenite by nitrogen and the good solution strengthening effect, the strength of austenitic stainless steels is improved, so this series of stainless steels is suitable for use in equipment and components that bear heavy loads and do not require high corrosion resistance.

Advantages: The biggest advantage of 200 series stainless steel is that it is cheaper than 300 series stainless steel.

Under the premise of weak corrosion, ASTM202 stainless steel can almost completely replace 304 stainless steel;

The use is relatively widespread, and it is widely used in building decoration, dining and kitchen utensils, sanitary equipment and appliances, household appliances, transportation, and equipment and components in the industrial sector.

Disadvantages: Compared with 304, 200 series stainless steel, the corrosion resistance is worse;

The workability of 200 series stainless steel is far less than that of 304 stainless steel;

If it is not clarified that it is 200 series waste, they will become a high-risk scrap mixed (hùn) raw material, resulting in a far higher manganese content in the castings and an unstable composition of the incoming material in the steel mill;

Remuneration identity: 200 series stainless steel is non-magnetic, and the appearance is similar to 304, which leads to the "criminal police philistine" to rush to the second level, pretending to be "304" for sale, bringing a huge loss to users.

Material, two grades of the 300 series.

Chemical composition of J1, J4, etc.

Grade: ** C Si Mn S P Cr Ni N Other.

J1 Standard 7 8 15 17 4 5 CU

Physical analysis

J4 Standard 15 16

AISI 201 Standard 16 18

AISI 202 Standard 17 19 4 6

211 Standard 16 17 4 6

The chemical composition of J1 is very similar to that of the US 211. However, compared with 211, only the amount of nickel is 1% lower, the lower limit of chromium is 1% lower, and the amount of copper is low.

The biggest difference between J1 and AISI is the addition of copper, the nickel content is at the lower limit, while the chromium content is 1% 2% lower.

J4-2 is what you look at, J4 is the Indian name. The ingredients, which have been given upstairs, are right. The key is the copper content. 201 contains high copper, which is J4 material. The other ingredients are not much different from 201.

Stainless steel grade J1 represents a steel grade of Lianzhong, and people usually call him 201 (different from the national standard, so Shanshaojian manufacturers call him J1); The products produced by various steel mills, even if the composition is almost the same, are very different. Behind the various names, what is reflected is the embarrassment that the trouser industry is currently facing - all these general levels of 201 are non-international standard products. In the international standard 201, the nickel Ni content is above and the chromium CR is above.

The current J3 product has a chromium content of only about 13. As for the intermediate frequency charge, it is even more complicated, so I will not repeat it here.

01 (American Standard) 1Cr17Mn6NIN (National Standard) C Cr16%-18%.

J1 is the Indian name, the carbon is a little higher than 201, generally around, the main difference is that J1 contains copper. Reach left and right.