The difference between 304J1, 304D, 304-2B stainless steel
The difference between 304J1, 304D, 304-2B stainless steel
Due to market demand, 304 stainless steel continues to evolve and change, resulting in several different specifications 304J1, 304D, 304-2B models. How to distinguish between these types of steel.
304 is the American stainless steel number, which is equivalent to 06Cr19Ni10 in the national standard GB / T 20878-2007 (0Cr18Ni9 in the old national standard). The industry is also called 18/8, also known as 304-2B steel grade, because its Cr is not less than 18, Ni is not less than 8, 304 is widely used, but chlorine will corrode it, so it contains salt and has a strong acidity and alkalinity. Avoid using it on dirty occasions.
As we all know, 304J1 is a copper-containing material of 304-2B, which is mainly used for deep processing and belongs to the nickel-saving series. The 304J1 retrofit that Zhangjiagang Pu put into production in 2007 has more nickel-saving advantages than the traditional 304 and 304J1. Nowadays, with excellent performance and price advantages, it has been heavily used by merchants in the market and is also posing as 2B Steel type.
Next, let's take a detailed look at the parameters of 304J1, 304D, 304-2B
1: Features and usage;
304J1 is a new type of stainless steel. On the basis of 304, the nickel content is reduced and the copper content is increased. It has good forming performance, excellent forming performance and better surface quality. , Its use is generally used in need of tableware, kitchen supplies, insulation cups, sinks, pots, decorative purposes, etc.
304D is a new product brand, independently developed by Qingshan. It is an economical corrosion-resistant stainless steel (note: economical), intended to replace 304. Product design starting point: on the basis of ensuring the corrosion resistance of SUS304-2B, improve the strength and hardness of the material, while reducing the production cost of the material.
304-2B is 18/8 stainless steel.
Products such as: corrosion-resistant containers, tableware, furniture, railings, medical equipment. The standard composition is 18% chromium plus 8% nickel. It is a non-magnetic stainless steel that cannot be changed by heat treatment. GB grade is 0Cr18Ni9.
2: Chemical composition;
304J1, 304J1 contains about 6.0% nickel, which is lower than 304-2B stainless steel.
304D, high chromium (18%), medium nickel (2.8), high copper (1.5%). Through the thermo-calc thermodynamic phase diagram calculation software of the digital research and development platform, the alloy elements of each phase component are adjusted, which not only improves the corrosion resistance of the material. The nickel content of 304D is only 2.8 nickel, but the manganese content is 7 manganese, so in a strict sense, 304D is not a 304 material, although its chromium content reaches 18.
304-2B stainless steel, its material composition is OCr18Ni9.
Due to market demand, 304 stainless steel continues to evolve and change, resulting in several different specifications 304J1, 304D, 304-2B models. How to distinguish between these types of steel.
304 is the American stainless steel number, which is equivalent to 06Cr19Ni10 in the national standard GB / T 20878-2007 (0Cr18Ni9 in the old national standard). The industry is also called 18/8, also known as 304-2B steel grade, because its Cr is not less than 18, Ni is not less than 8, 304 is widely used, but chlorine will corrode it, so it contains salt and has a strong acidity and alkalinity. Avoid using it on dirty occasions.
As we all know, 304J1 is a copper-containing material of 304-2B, which is mainly used for deep processing and belongs to the nickel-saving series. The 304J1 retrofit that Zhangjiagang Pu put into production in 2007 has more nickel-saving advantages than the traditional 304 and 304J1. Nowadays, with excellent performance and price advantages, it has been heavily used by merchants in the market and is also posing as 2B Steel type.
Next, let's take a detailed look at the parameters of 304J1, 304D, 304-2B
1: Features and usage;
304J1 is a new type of stainless steel. On the basis of 304, the nickel content is reduced and the copper content is increased. It has good forming performance, excellent forming performance and better surface quality. , Its use is generally used in need of tableware, kitchen supplies, insulation cups, sinks, pots, decorative purposes, etc.
304D is a new product brand, independently developed by Qingshan. It is an economical corrosion-resistant stainless steel (note: economical), intended to replace 304. Product design starting point: on the basis of ensuring the corrosion resistance of SUS304-2B, improve the strength and hardness of the material, while reducing the production cost of the material.
304-2B is 18/8 stainless steel.
Products such as: corrosion-resistant containers, tableware, furniture, railings, medical equipment. The standard composition is 18% chromium plus 8% nickel. It is a non-magnetic stainless steel that cannot be changed by heat treatment. GB grade is 0Cr18Ni9.
2: Chemical composition;
304J1, 304J1 contains about 6.0% nickel, which is lower than 304-2B stainless steel.
304D, high chromium (18%), medium nickel (2.8), high copper (1.5%). Through the thermo-calc thermodynamic phase diagram calculation software of the digital research and development platform, the alloy elements of each phase component are adjusted, which not only improves the corrosion resistance of the material. The nickel content of 304D is only 2.8 nickel, but the manganese content is 7 manganese, so in a strict sense, 304D is not a 304 material, although its chromium content reaches 18.
304-2B stainless steel, its material composition is OCr18Ni9.
304 Stainless Steel Chemical composition
| Grade | Chemical composition | ||||||
| C | Ni | Cr | Mn | Si | S | P | |
| 304 | ≤0.08 | 8.00 ～ 10.00 | 18.00 ～ 20.00 | ≤2.0 | ≤1.0 | ≤0.030 | ≤0.035 |
3: Features;
The appearance surface of 304J1 is also no different from that of 304-2B. With the reduction of Mi content, the deep processing performance can not be compared with the original 304J1.
There are two other 304 steel types, 304 L and 304 N. 304 L: It has the same characteristics as 304, but with low carbon, it is more corrosion-resistant and easy to heat-treat, but has poor mechanical properties. It is suitable for welding and products that are not easy to heat-treat. 304 N: The same characteristics as 304, it is a kind of nitrogen-containing stainless steel. Nitrogen is added to improve the strength of the steel.
304D and 304J1 steels were successfully developed and put into the market shortly. Various performances, especially corrosion performance, are worse than 304-2B. If the user purchases materials for deep processing, it is more unsuitable to choose 304D and 304J1.
The above three materials 304J1, 304D, 304-2B, if it is used on the stainless steel thermal insulation water tank, 304-2B is the better choice. Because the nickel content of 304-2B reaches more than 8%, his corrosion resistance is stronger, and sometimes the customer may use water for domestic purposes.
There is a conceptual thing, such as drinking water and bath water. I think bath water does not need to have such a good plate, as long as it can be used for more than seven or eight years and more than ten years. This is actually a misunderstanding. Water is essentially the same in nature. Bath water and drinking water are actually the same using 304 high ratio plates.
