201 STAINLESS STEEL in different grade J1 J2 J3 J4 J5

      201 stainless steel is a type of austenitic stainless steel that belongs to the 200 series. It is a low-nickel, high-manganese stainless steel alloy. We often called it stainless steel  decorative pipe . And 201 stainless steel in China contains 5 types J1, J2, J3, J4 and J5 with different composition and application. In order to make the customer well known the difference, we will make a simple introduction here and hope it is helpful for more friends who want to know more about this material.

Origin of 201:

Composition: 201 stainless steel typically contains around 16-18% chromium, 3.5-5.5% nickel, and around 5-7.5% manganese. The absence of molybdenum and a lower nickel content compared to other stainless steel grades contribute to its lower cost.

Properties: 201 stainless steel exhibits good corrosion resistance in mildly corrosive environments, making it suitable for use in indoor applications. However, it may be less resistant to corrosion and oxidation compared to higher-grade 304 stainless steels or 316.

Birth: Series 200 stainless steel was born during World War II as a replacement for Series 300 stainless steel which was first developed successfully in the United States.

Development: The indians who original participated in the United States to develop 200 series of stainless steel made 200 series further developed, they study from India's own resources---rich in manganese resources, and lack of nickel.

Different grade of 201 stainless steel in China. 

201 series of stainless steel in China mainly include: J4, J1, J3, J2, J5......

In the early years, we named high copper (J4), semi-copper (J1) to distinguish 201 steel, but with the downward development of copper content, there is a replacement of J1 and J3, and then the birth of J2 and J5 to replace J3.

We make the composition testing and we know that the nickel and chromium composition of J series is actually not very different, but it is obvious different between Carbon and Copper. So we make below message:

Copper: J4 > J1 > J3> J2>J5

Carbon: J5 > J2 >J3> J1>J4

Hardness: J5 > J2 > J3>J1>J4

Based on his different composition and properties, 201 stainless steel application as flowing:

J4:  

It is the higher-end of the J series, suitable for deep drawing products with small Angle type, deep drawing and salt spray test products will mostly choose it.For example, sink, kitchenware, bathroom products, kettle, vacuum cup, door hinge, pot, etc.

J1:

 the carbon is slightly higher than J4 and the copper is lower than J4. The processing performance is not as good as J4, suitable for light drawing, deep drawing products of large Angle type, such as decorative board, bathroom products, sink, product pipes, etc.

J3:

Suitable for decorative pipes.Simple processing in decorative board can be ok, add a little more difficult is not good. Feedback indicates that the shear plate is bent, and there is an inner seam after it is broken (do a good job of black titanium, color plate series, sand plate, it is broken, and there is an inner seam after it is broken).The sink material has tried bending, 90° is OK, but it will not ok if it continues.

J2, J5:

About decorative pipe: simple decorative pipe is still good, because the hardness is high (above 96°) polished more beautiful, but square pipe or in the bend (90°) is prone to burst.

About plate: due to high hardness, the surface is more beautiful, surface treatment such as grinding, polishing, plating color is OK. But the biggest problem is the bending problem, bending is easy to break, gouging groove easy to burst. But ductility no good.

We are factory and mainly produce the stainless steel pipe and related pipe fittings.

304 316L industrial pipe, sanitary pipe, decorative pipe, seamless pipes in AP,MP,BA,EP grade etc.

stainless steel fittings : elbow 45 90,tee,cross,coupling,consentric etc.

Welcome to inquiry and thank you.