In the situation of the price of Nickel increasing continuously, the stainless steel lines containing low nickel content, low and stable price bring real attraction. And the Inox 201 is a suitable choice, the Inox grade is gradually gaining more market share, where Inox 304 and 301 are the main choice.
Price:
In the situation of the price of Nickel increasing continuously, the stainless steel lines containing low nickel content, low and stable price bring real attraction. And the Inox 201 is a suitable choice, the Inox grade is gradually gaining more market share, where Inox 304 and 301 are the main choice. The stainless steel in grade 201 has a low and stable price due to the use of Magan instead of Nickel. This makes the Inox 201 has many properties similar to the Inox 304 and has the same appearance as the Inox 304.
As is known, Inox is a steel containing more than 11% Chromium, because this has created a layer of Inox to protect against corrosion. Nickel is also known as the main factor that brings stability to the Austenitic phase and excellent machinability for Inox.
304 stainless steel has a minimum nickel content of 8%. Among the elements that make up Austenitic, there are many substitutes of nickel to provide resistance to corrosion. For example: Chrom (this is the main element that creates corrosion resistance for Inox), Manganese (also contributes to stabilizing the Austenitic phase), Nitrogen also contributes to the hardness, Copper (Cu) also contributes to stable Austenitic phase.
In Inox 201, people use Magan as the main element to replace Nickel in a 2: 1 ratio. We can see according to the chemical composition as follows:
+ Inox 201: 4.5% Nickel and 7.1% Manganese
+ Inox 304: 8.1% Nickel and 1% Manganese
With ingredients like this has contributed to the cost of raw materials of Inox 201 down very low. This is the first advantage of 201.
Durability and machinability
The density of Inox 201 is lower, but the durability of Inox 201 is 10% higher than that of Inox 304
Due to the same elongation ability compared to 304 Inox, Inox shows properties similar to 304 in the process of bending, shaping and laminating. But to a certain extent, the Inox 304 is still easier to laminate and when laminated, it saves more energy than Inox 201 (this is due to the influence of the element Manganese on Inox 201, making Inox 201 harder than Inox 201 304)
Resistance to corrosion
When comparing the chemical composition (TPHH) of the stainless steel in grade 201 and the stainless steel in grade 304, we see that the chromium content of Inox 201 is about 2% lower than that of Inox 304. Because of this, the Inox 201 has a lower corrosion resistance than the Inox 304.
Resistance to pitting is determined mainly by two elements Chromium and Sulfur (S). Chromium enhances corrosion resistance, while sulfur reduces resistance to corrosion. In TPHH, these 2 stainless steels have the same ingredient Luu Huynh. So the surface pitting resistance of Inox 201 is lower than that of Inox 304.
304: Stainless steel 304
4Ni: Inox 201 (Inox 201 only contains about 4% Nickel)
The results are as shown above after being experimented with spraying salt water for 575 hours. Because of this, we see that the Inox 201 is not suitable for the maritime industry.
Inox 201 applications
+ Kitchen equipment such as pans, pots => Matching
+ Washer, dishwasher => Not suitable, due to the existence of crevice corrosion)
+ Food Processing Equipment => Not suitable for places with pH <3.
+ Chemical, oil and gas, nuclear energy => Impossible
+ Interior decoration => suitable
+ In the exterior location => Not suitable, if used, must be maintained regularly.