Which is better, stainless steel or stainless steel case, and is better stainless steel or tungsten

And stainless steel and stainless steel are made of steel, but stainless steel is just ordinary steel, and stainless steel is better with more corrosion-resistant materials. The term "stainless steel" refers not only to one type of stainless steel, but also to more than a hundred types of stainless steel for industrial use. Each developed stainless steel has good properties in its specific application area.

The key to success is to figure out the purpose and then determine the correct steel grade. There are usually only 6 types of steel that are relevant to the application of building structures. They all contain 17-22% chromium, and the better steels also contain nickel.

The addition of molybdenum can further improve atmospheric corrosion, especially resistance to chlorine-containing atmosphere. Stainless steels are generally divided into martensitic steels, ferritic steels, austenitic steels, austenitic-ferritic (duplex) stainless steels, and precipitation-hardened stainless steels. In addition, it can also be divided into chromium stainless steel, chromium-nickel stainless steel and chromium-manganese-nitrogen stainless steel.

Ferritic stainless steel contains 15% 30% chromium. Its corrosion resistance, toughness, and weldability increase with increasing chromium content, and its resistance to chloride stress corrosion is superior to other kinds of stainless steel, such as CRL7, CR17MO2TI, CR25, CR25MO3TI, and CR28. Due to its high chromium content, ferrite has good corrosion resistance and oxidation resistance, but its mechanical properties and process properties are poor, so it is mostly used in acid-resistant structures with less stress and as oxidation-resistant steel.

This steel can resist the corrosion of atmosphere, nitric acid and salt solutions, and has the characteristics of good oxidation resistance at high temperature and low coefficient of thermal expansion. It is used in nitric acid and food plant equipment, and can also be used to manufacture parts that work at high temperatures, such as gas turbine parts. Austenitic stainless steel contains more than 18% chromium, about 8% nickel and a small amount of molybdenum, titanium, nitrogen and other elements.

It has good comprehensive performance and can resist the corrosion of various media. Common grades of austenitic stainless steel are 1Cr18Ni, Cr19Ni9 and so on. 0Cr19Ni9 steel tungsten carbide.

The term "steel" is a colloquial term for specially smelted high-precision steel, and there is no such term in academia or engineering.

The "stainless steel" used in the watch case, bracelet and crown generally refers to 316L steel, which belongs to ordinary austenitic stainless steel, which has very strong corrosion resistance and very good texture, and will not have a bad impact on the human body.

The 904L steel is an ultra-heat-resistant stainless steel alloy, containing chromium, nickel, etc., its corrosion resistance is almost comparable to the best materials, and the manufacturing cost is much higher than that of 316L steel, at present, only Rolex widely and systematically applies this material to the manufacture of cases, bracelets and crowns.

Tungsten. Also called tungsten carbide.

It is a kind of metal with high hardness, wear resistance and good strength, in addition to this, it has the characteristics of heat resistance and corrosion resistance. Coupled with the high gloss of tungsten steel, the watch made of tungsten steel is more noble and fashionable than ordinary watches, and is deeply loved by consumers in the market. But there are also some friends who don't understand the difference between tungsten steel watches and all-steel watches.

Next, let the watch house introduce the difference between the two!

1. The appearance of tungsten steel watches is scratch-resistant and shiny. The appearance of pure steel watches is only white, and it generally does not have anti-scratch function, and it is easy to have a lot of scratches after a long time.

2. Semi-steel watches refer to cases made of copper alloy.

Generally brass.

Done, and then plated with a layer of chromium (commonly known as Chromie), when the new is very bright, it will wear out or even fall off after a long time, revealing the copper inside, it becomes ugly, and the hands will sweat and produce patina.

3. Tungsten steel watches are generally heavier, which is also a characteristic of tungsten steel, while pure steel watches are relatively lighter, but suitable for friends who have just bought a watch.

Fourth, according to the material, tungsten steel is more expensive, polished during production, the scrap rate of the product is also high, pure steel is cheaper, but it seems to be not much worse when used on watches.

Of course, tungsten steel is better and more wear-resistant. Stainless steel is particularly susceptible to scratches, while tungsten steel is not. Let's do it!

Summary. The hardness of tungsten steel table is good, and the stainless steel table is lightweight;

Tungsten steel is a heavy metal that is not easy to wear, the color is black and bright, but because it is hard and brittle, it is not falling, stainless steel is a light metal, the surface is soft and easy to scratch, and the color is gray;

The appearance of tungsten steel watches has anti-scratch function, which is shiny, and the appearance of pure steel watches is white, which does not have anti-scratch function, and is easy to have many scratch marks after a long time;

Material, the material of tungsten carbide quartz table, is tungsten steel, which is a rare metal, but some people's **tungsten steel is easy.

Is it better to watch stainless steel or tungsten steel?

Each has its own advantages and disadvantages.

1.The hardness of tungsten steel table is good, and the stainless steel table is lightweight; 2.Tungsten steel is a heavy metal that is not easy to wear, the color is black and bright, but because it is hard and brittle, it is not falling, stainless steel is a light metal, the surface is soft and easy to scratch, and the color is gray; 3.

The appearance of tungsten steel watches has anti-scratch function, which is shiny, and the appearance of pure steel watches is white, which does not have anti-scratch function, and is easy to have many scratch marks after a long time; 4.Material, the material of tungsten carbide quartz table, is tungsten steel, which is a rare metal, but some people's **tungsten steel is easy.

**Licensed watches are divided into all-steel and half-steel.

The case and back cover of an all-steel watch are made of stainless steel.

The case of the semi-steel watch is brass with a chrome polished surface; The back cover is stainless steel.

It's not clear what "steel" is.

In the eighties appeared "carbide" cases, called "never wear" cases. Tungsten carbide is a tool alloy used in machining, which has extremely high hardness and is extremely wear-resistant.

As the saying goes: "The meat of the bun is not on the folds" The quality of a watch lies in the movement, not in the case. The high-quality watches of the sixties and seventies of the last century "Roma", "Inag", "Bailangdo", almost half of them were semi-steel, and Omega also had semi-steel.

The old domestic Shanghai watches also have semi-steel ones with excellent quality.

1. Stainless steel is more corrosion-resistant than aluminum alloy.

2. The corrosion resistance of rusty steel is much higher than that of aluminum alloy;

3. The finish and decoration of stainless steel are better than those of aluminum alloy.

4. Chemical properties: chemical corrosion resistance and electrochemical corrosion resistance are the best in steel, second only to titanium and gold.

5. Physical properties: heat resistance, high temperature resistance, low temperature resistance and even ultra-low temperature resistance.

Austenitic stainless steel is non-magnetic and has high toughness and plasticity, but the strength is low, it is impossible to strengthen it by phase change, and can only be strengthened by cold working, such as adding S, CA, SE, TE and other elements, it has good machinability.

1. The hardness of stainless steel is much higher than that of aluminum alloy and it is not easy to be damaged; 2. The corrosion resistance of stainless steel is much higher than that of aluminum alloy; 3. The finish and decoration of stainless steel are better than those of aluminum alloy.

Stainless steel is more susceptible to scratching, especially mirrored ones.

Stainless steel is more corrosion-resistant than aluminum alloys.