The apparent difference between stainless steel 202 and 201

First, the physical and chemical properties are different.

1. Stainless steel 202: contains.

About 8% nickel and a small amount of molybdenum, titanium, nitrogen and other elements. It has good comprehensive performance and can resist corrosion of a variety of media.

2. Stainless steel 201: it has certain acid and alkali resistance, high density, no bubbles in polishing, no pinholes and so on.

Second, the appearance is different.

1. Stainless steel 202: contains chromium and forms a thin chromium film on the surface, which isolates the oxygen invading from the steel to play a role in corrosion resistance.

2. Stainless steel 201: 8K mirror; brushed, titanium-plated, frosted; alabaster sand; Stainless steel fingerprintless plate.

Third, the role is different.

1. Stainless steel 202: widely used in architectural decoration, municipal engineering, highway guardrails, hotel facilities, shopping malls, glass handrails, public facilities and other places.

2. Stainless steel 201: It is a high-quality material for the production of various cases and strap case backs. It is mainly used for decorative pipes, industrial pipes, and some shallow drawing products.

Stainless steel 202 and 201 are two models with different materials. In fact, the biggest difference between the different components is the difference in corrosion resistance. 200 series stainless steel is a low-nickel and high-manganese stainless steel, with a nickel content of less than 4% and a manganese content of about 8%, which is a nickel-saving stainless steel.

202 stainless steel is widely used in building decoration, municipal engineering, highway guardrails, hotel facilities, shopping malls, glass handrails, public facilities and other places. It is made of high-precision automatic pipe-making equipment, through its own solution welding, rolling and forming, and welding with gas protection (inside and outside the pipe) without any metal filler.

201 stainless steel has certain acid and alkali resistance, high density, polishing without bubbles, no pinholes, etc., and is a high-quality material for the production of various cases and strap covers. It is mainly used for decorative pipes, industrial pipes, and some shallow drawing products.

In addition, manganese is commonly present in 201,202 materials, which will be harmful to human health when used as tableware materials, and the state has expressly prohibited it.

Summary. 202 stainless steel is better than 201 stainless steel.

202 stainless steel is an upgraded version of 201 stainless steel, 202 stainless steel manganese content, 201 stainless steel manganese content, it can be seen that the corrosion resistance of 202 stainless steel material is stronger than 201 stainless steel material.

Uses of 202 stainless steel and 201 stainless steel.

Stainless steel: 202 stainless steel is widely used in public facilities, municipal engineering, building decoration and other places due to its welding method of self-erosion welding and rolling forming.

Stainless steel: 201 stainless steel is widely used in some shallow drawing products, decorative pipes, etc. due to its high density, polishing, no bubbles, no pinholes, etc.

What is the difference between 201 and 202 stainless steel? Which is better?

202 stainless steel is better than 201 stainless steel. 202 stainless steel is an upgraded version of 201 stainless steel, 202 stainless steel manganese content, 201 stainless steel manganese content, it can be seen that the corrosion resistance of 202 stainless steel material is stronger than 201 stainless steel material. Uses of 202 Stainless Steel and 201 Stainless Steel Stainless Steel:

202 stainless steel is widely used in public facilities, municipal engineering, building decoration and other places due to its welding method of self-erosion welding and rolling forming Stainless steel: 201 stainless steel is widely used in some shallow stretch products, decorative pipes, etc. due to its high density, polishing, no bubbles and no pinholes.

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According to the composition, it can be divided into CR series (400 series), Cr Ni series (300 series), Cr Mn Ni (200 series) and precipitation hardening (600 series).

200 series - chromium-nickel-manganese austenitic stainless steel.

300 Series – Chromium-nickel austenitic stainless steel.

301—Good ductility, used for molding products. It can also be quickly hardened by machining. Good weldability. The wear resistance and fatigue strength of Yuanyun are better than those of 304 stainless steel.

302-The corrosion resistance is the same as 304, and the strength is better because the carbon content is relatively high.

303—By adding a small amount of sulfur and phosphorus, it is easier to cut than 304.

304 — i.e. 18-8 stainless steel. The GB grade is 0Cr18Ni9.

309—Better temperature resistance than 304.

316-After 304, the second most widely used steel grade, mainly used in the food industry, pharmaceutical industry and surgical equipment, the addition of molybdenum element to obtain a special corrosion-resistant structure. Because it has better resistance to chloride corrosion than 304, it is also used as "marine steel". SS316 is commonly used in nuclear fuel** installations.

18 grade 10 stainless steel is also generally suitable for this application class. [1] Stainless steel bucket model 321 – similar to 304 except for the addition of titanium to reduce the risk of corrosion in the welds of the material.

400 Series – Ferritic and martensitic stainless steels.

408—good heat resistance, weak corrosion resistance, 11% CR, 8% NI.

409—the cheapest model (Anglo-American), usually used as a car exhaust pipe, is ferritic stainless steel (chrome steel).

410-martensitic (high-strength chromium steel), good wear resistance, poor corrosion resistance.

416—Sulfur is added to improve the processability of the material.

420—"Cutting tool grade" martensitic steel, similar to Brinell high-chromium steel, the earliest stainless steel. It is also used for surgical knives and can be made very bright.

430 – Ferritic stainless steel, for decoration, e.g. for automotive accessories. Good formability, but poor temperature resistance and corrosion resistance.

440—High-strength cutting edge steel, slightly higher carbon content, after proper heat treatment, can obtain high yield strength, hardness can reach 58HRC, belongs to the hardest stainless steel. The most common example of application is the "Sakura Crack Kei razor blade". There are three commonly used models:

440A, 440B, 440C, and 440F (easy to process).

500 Series – Heat-resistant chromium alloy steel.

600 Series – Martensitic precipitation hardening stainless steel.

Stainless steel 630 - the most commonly used precipitation hardening stainless steel model, usually also called 17-4; 17%cr，4%ni。

First, the types of the two are different:

Types of stainless steel: There are mainly the following 200 series steel grades in China: J1, J3, J4, 201, 202.

Later, there were 200 and other steel grades with lower nickel content control, as for 201c, it was the extension of 201 steel grades developed by individual steel mills in China in this later period;

The national standard grades of 201 are: the old grade is 1Cr17Mn6Ni5N, and the new grade: 12Cr17Mn6Ni5N 201C continues to reduce the nickel content and increase the manganese content on the basis of 201.

Types of stainless steel: Stainless steel is often divided into martensitic steel, ferritic steel, austenitic steel, etc. according to the microstructure. In addition, it can be divided into chromium stainless steel, chromium-nickel stainless steel and chromium-manganese-nitrogen stainless steel according to the composition.

Second, the characteristics of the two are different:

Characteristics of stainless steel: 201 stainless steel has certain acid resistance, alkali resistance, dense size beam, high and cautious transportation, polishing without bubbles, no pinholes and other characteristics.

Features of stainless steel: The use of 304 stainless steel in a dry indoor environment works quite well. However, in the countryside and in the city, to maintain its appearance outdoors, it needs to be cleaned frequently.

In the highly polluted industrial areas of Hyosho and coastal areas, the surface can be very dirty and even rusty.

Third, the hardness of the two is different:

Hardness of stainless steel: HRB<183N(MPa).

Hardness of stainless steel: HB 187HRB 90HV 200.

First, the performance is different.

Stainless steel, with a certain acid resistance, alkali resistance, high density, polishing without bubbles, no pinholes and other characteristics, is a variety of cases, strap back high-quality materials, etc. It is mainly used for decorative pipes, industrial pipes, and some shallow drawing products.

It is the steel grade that is most susceptible to cold deformation and strengthening, and the strength and hardness of the steel can be improved through cold deformation processing, and sufficient plastic and toughness can be retained, and the steel has good rust resistance under atmospheric conditions, but the corrosion resistance in reducing media is not good, and the corrosion resistance in chemical media such as acid and alkali salts is poor, so it is not recommended for use in corrosive and harsh environments.

Second, the chemical composition is different.

The main difference is in the content of nickel and manganese, 301 nickel is 6%-8%, manganese is 2%. 201 nickel slag slag is, manganese is. Therefore, 301 is higher than 201 in terms of ** and corrosion resistance, and 301 contains more nickel.

So compare the performance of acid and alkali resistant stainless steel. Not easy to rust. The inside of 201 does not contain nickel, does not have the ability to look at acid and alkali, and is easy to rust.

Third, the use is different.

201 stainless steel is mainly used for decorative pipes, industrial pipes, and some shallow drawing products. The 301 is mainly used in a cold working state for equipment components that are subjected to higher loads and want to reduce the weight of the equipment and do not rust. In addition, this steel is prone to work hardening when hit by external forces, which can absorb more impact energy, and the performance of stainless steel will provide more reliable safety for equipment and personnel.

301 is prone to work hardening when deformed, and is used in places that require high strength.

Outokumpu LDX 2101 ASTM S32101 Duplex Stainless Steel.

Main Ingredients: 21 22%Cr, 4 6%Mn, Product Description: LDX2101 is a nitrogen-containing duplex stainless steel that can provide high strength and good resistance to chloride stress corrosion cracking. This duplex steel has 50% ferrite and 50% austenite.

Manganese ensures a corresponding balance between austenite and ferrite and reduces nickel content. The combination of the duplex structure and a certain N content allows the final tensile strength to reach 94 ksi (650 MPa) compared to 70 ksi (480 MPa) of 316 steel. Compared with the hardness of 316 steel, LDX2101 steel has a hardness of reaching, and its corrosion resistance is better than that of 304L steel, which is comparable to that of 316L steel.

The microstructure of LDX2101 steel allows it to have very good resistance to intergranular corrosion, and it has better uniform corrosion resistance in sulfuric acid than 304L steel, and in some cases it has good properties like 316L steel.

2205 duplex stainless steel is a duplex stainless steel composed of 21% chromium, molybdenum and nickel-nitrogen alloys. It has high strength, good impact toughness, and good overall and local resistance to stress corrosion. Duplex stainless steels have twice the yield strength of austenitic stainless steels, a feature that allows designers to reduce weight when designing products, giving this alloy an advantage over 316,317L.

This alloy is particularly suitable for temperatures ranging from -50°F to +600°F. This alloy can also be considered for applications beyond this temperature range, but there are some limitations, especially when applied to welded structures.

Duplex stainless steel has twice the compressive strength compared to austenitic stainless steel, and designers can reduce its weight compared to 316L and 317L. Alloy 2205 is particularly suitable for the -50°F +600°F temperature range and can also be used at lower temperatures in tightly restricted situations, especially for welded structures.

Chemical composition: C mn si p s cr ni austenite-ferrite type).

Duplex stainless steel applications :

Pressure vessels, high-pressure storage tanks, high-pressure pipes, heat exchangers (chemical processing industry).

Oil and gas pipelines, heat exchanger fittings.

Sewage treatment system.

Pulp and paper industry sorters, bleaching equipment, storage and handling systems.

Rotary shafts, press rolls, blades, impellers, etc. in high-strength and corrosion-resistant environments.

Cargo boxes for ships or trucks.

Food processing equipment.

Dear, I am glad to answer for you: 201 stainless steel, with a certain acid resistance, alkali resistance, high density, polishing without bubbles, no pinholes, etc., is the production of various cases, strap case back high-quality materials, etc. It is mainly used for decorative pipes, industrial pipes, and some shallow drawing products.

Stainless steel is the abbreviation of stainless acid resistant steel, and the steel grade that is resistant to weak corrosive media such as air, steam, and water or has stainless steel is called stainless steel; The steel that is resistant to corrosion by chemically corrosive media (acid, alkali, salt and other chemical corrosion) is called acid-resistant steel. Therefore, the difference between 201 and stainless steel: 201 stainless steel has certain acid and alkali resistance, high density, polishing without bubbles, no pinholes, etc., and is a high-quality material for the production of various cases and strap case backs.

It is mainly used for decorative pipes, industrial pipes, and some shallow drawing products. Stainless steel is the abbreviation of stainless acid resistant steel, and the steel grade that is resistant to weak corrosive media such as air, steam, and water or has stainless steel is called stainless steel; The steel that is resistant to corrosion by chemically corrosive media (acid, alkali, salt and other chemical corrosion) is called acid-resistant steel.