What is the difference between 304D stainless steel and 304J stainless steel

1. The name is different, one is called 304D stainless steel, and the other is called 304J stainless steel.

2. The nickel content is different, 304J contains 6 percentage points of nickel, and 304D contains 8 percentage points of nickel.

The most important elements in 304 are Ni and CR, but they are not limited to these two elements. The specific requirements are specified by the product standard. The common judgment situation in the industry is that as long as the Ni content is greater than 8% and the CR content is greater than 18%, it can be regarded as 304 stainless steel.

304D and 304J are a name for stainless steel, the main difference between the two names is the difference in the content of the components, the national standard 304 is to specify the content of each component of the steel range. The main standard of 304 is mainly Ni (nickel) and Ci (chromium) content, Ni >> 18. However, some steel mills have made such standard steels in order to cater to the market and save costs.

304d is 2 ni and 304j is 6 ni

Austenitic stainless steel includes more, and 304 stainless steel is also among them (304 is the American grade), that is, China's 0Cr18Ni9 (China's new grade 00Cr19Ni10).

Ask the supervisor This should be the number of stainless steel products in storage Stainless steel 304 material is only divided into 2 types, one is 304 and the other is 304L

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Answer, the difference between 304 and 304D stainless steel is the difference in material content: first of all, there is a difference in material content: 304 is the most common general stainless steel material on the market.

Typically the chromium content is 18 chromium and the nickel content is 8 nickel. In terms of chemical composition, 304d (d) has only one nickel in nickel, but 7 manganese in manganese, so in a strict sense, 304d is not a 304 material, although its chromium content reaches 18. Secondly, there are differences:

The ** of 304D stainless steel is about 3000 yuan cheaper than the ** of 304 stainless steel. Finally, there is a difference in performance: due to the difference in the content of various elements in 304D and 304 stainless steel, the corrosion resistance of 304D is much worse than that of 304 stainless steel.

What is the difference between stainless steel of 304 and 304D.

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Answer, the difference between 304 and 304D stainless steel is the difference in material content: first of all, there is a difference in material content: 304 is the most common general stainless steel material on the market.

Typically the chromium content is 18 chromium and the nickel content is 8 nickel. In terms of chemical composition, 304d (d) has only one nickel in nickel, but 7 manganese in manganese, so in a strict sense, 304d is not a 304 material, although its chromium content reaches 18. Secondly, there are differences:

The ** of 304D stainless steel is about 3000 yuan cheaper than the ** of 304 stainless steel. Finally, there is a difference in performance: due to the difference in the content of various elements in 304D and 304 stainless steel, the corrosion resistance of 304D is much worse than that of 304 stainless steel.

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 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, and there is no big difference from the 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.

1. In fact, there is not much difference, 304 is 1cr18ni9. The mechanism of stainless steel rust prevention is that the alloying elements form a dense oxide film, which isolates oxygen contact and prevents further oxidation. It is true that 304A meets the requirements of 304, and is better than 304, as if it can automatically replace 304, but from the mechanical properties in Table 2, it can be seen that the strength of 304 is higher than that of 304A, when it is designed according to 304, it will be replaced by 304L, which will cause insufficient strength;

2. In addition, in China's GB150-1998 pressure vessel standard, it is stipulated that when the use temperature of austenitic stainless lead steel is higher than 525, the carbon content in the steel should not be less than. As can be seen from Table 1, 304 can be used in most departments, but 304A cannot be used for segmentation.