According to the Encyclopedia, 201 stainless steel should have certain acid and alkali resistance, high density, no bubbles after polishing, no pinholes, etc. It can produce various kinds of products with beautiful appearance. It’s mainly used for decorative tubes, industrial tubes, some little drawing products.
Because there is no national standard, the current 201 stainless steel in China has five types of J4, J1, J3, J2, and J5 due to differences in composition and application fields. In view of the time, and with the J2, J5’s popular, there is quite a lot confusion on different type of 201. According to the needs of customers, we make a brief analysis of 201 J series for your reference.
201 Past life:
Birth: 200 series stainless steel was born in World War II, and was first developed in the United States as an alternative to 300 series stainless steel.
Development: The Indians who participated in the development of 200 series stainless steel in the United States developed further 200 series material in India on the foundation of national conditions about abundant manganese resources and the shortage of nickel resources.
Chinese 201 this life
Chinese stainless steel 201 series mainly are J4, J1, J3, J2, J5...
In the early years, we often distinguished 201 steel grades with high copper (J4) and semi-copper (J1), but with the development of lower copper content, there was born J3 instead of J1; then, J2 and J5 instead of J3.
J series element composition comparison
We picked the J series sample element table of Tsingshan and Chengde, which has the largest output at present. The comparison as follows:
From the above figure, we can see that the nickel and chromium components of the J series haven’t had particularly different. However, from the perspective of carbon content and copper content, it’s the most obvious.
J series price comparison
According to the market prices of today's Tsingshan (J1-J4) and Chengde (J5) hot rolled, we list as follows:
As we can be seen from the table, the order of prices from high to low is: J4>J1>J3>J2, J5.
Practice is the sole criterion for testing truth. Which industries are suitable for the J series in the eyes of users respectively?
The main key feedback is as follows:
J4: It’s a higher-end J series, which is suitable for deep drawing products especially the requirement of salt spray test. For example, sinks, kitchen utensils, bathroom products, water bottles, vacuum flasks, door hinges, pots, etc.
J1: The carbon content is slightly higher than J4 and the copper content is lower than J4. Its processing performance is less than J4, and suitable for ordinary shallow drawing, such as decorative boards, sanitary products, sinks, product tubes, etc.
J3: Suitable for ornament tubes. Simple processing on the decorative panel, but it’s not possible with a little difficult processing. There is feedback that the material was found an inner seam after bending and breaking (black titanium, color plate series, sanding plate, broken, folded out with inner seam). The sink material has been tried to bend in 90 degrees, but it won’t be continued.
J2、J5：
Ornament tubes: Simple ornament tubes are still good, because the hardness is high and the polishing result is more beautiful, but for the square tube or the curved tube (90°) is prone to breaking open.
Flat plate: due to the high hardness, the surface is more beautiful, and the surface treatment such as No.4, polishing and plating is no problem, but the biggest problem is the bending, it’s very easy to break when bending, and the groove is easy to break open. Poor ductility.
Market review
“J2 is very hard, how can I press? Only can be re-rolled to the thickness 0.6; J3 can be directly pressed to the thickness 0.5, J1 can be 0.4. Now the J3 material suddenly stay in an awkward position, no one wants it. If you have slightly requirements, you will choose J1. If you are no requirements, you will use J2. The cost performance is there...”
Talking about the use of the J series, there is a feedback from the re-rolled mill.
“The above explanation demonstrates the better cost performance is J2 if customer do not have many requirement on material, but moving on next step, J2 got problem when bending and shearing. Why do we buy? There are quite a lot of customers complaints because of many disputes since March. Traders said that downstream customers chose to return the material bending and shearing. This situation is very unfavorable to traders. In addition to no profit, they also has to deal with various complaints.”
One comment of decorative board manufacturers.
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