Is stainless steel an alloy? Which is better, alloy or stainless steel

Stainless steel is not a metal. Stainless steel belongs to alloys, which belong to metal materials, not to metals, because metals belong to elemental substances, and stainless steel belongs to mixtures. Stainless steel refers to the steel that is resistant to weak corrosive media such as air, steam, water and chemical corrosive media such as acid, alkali and salt, also known as stainless acid-resistant steel.

In practical application, the steel that is resistant to corrosion by weak corrosive media is often called stainless steel, and the steel that is resistant to chemical media corrosion is called acid-resistant steel.

Due to the difference in chemical composition between the two, the former is not necessarily resistant to chemical media, while the latter is generally stainless steel. The corrosion resistance of stainless steel depends on the alloying elements contained in the steel.

Stainless steel belongs to high-alloy steels.

The alloy content of stainless steel is greater than 10%.

Alloy steels with less than 5% of the total alloying elements are called low-alloy steels. Low-alloy steel is relative to carbon steel, which is based on carbon steel, in order to improve one or more properties of steel, and intentionally add one or several alloying elements to the steel. When the amount of alloy added exceeds the general content of carbon steel in the normal production method, this steel is called alloy steel.

When the total amount of alloy is less than 5%, it is called low-alloy steel. Alloys with an alloy content between 5-10% are called medium alloy steels; More than 10% is called high-alloy steel.

Alloy is different from stainless steel.

1. Differences in composition.

The main elements made of aluminum alloy shell are aluminum, silicon, copper, magnesium and zinc, and according to the different content of each element, the molded aluminum alloy shell will have different properties.

The stainless steel shell is made of steel, and chromium, nickel, manganese, silicon, copper and other metals are added in the smelting process, of which chromium is the main alloying element, and the content of chromium in stainless steel is at least.

2. Differences in corrosion resistance.

Aluminium alloys are corrosion-resistant because of the corrosion-resistant oxide film on the surface, which prevents further corrosion of the metal inside.

Whereas, stainless steel mainly contains corrosion-resistant nickel-chromium alloys.

Therefore, when the field of product application has the requirement of anti-corrosion, the housing made of stainless steel is the first choice.

Hello dear. Your question is answered as follows. Generally, stainless steel is good.

The biggest difference between alloy and stainless steel is the difference in hardness, price, surface treatment, etc.; The hardness of the alloy is lower than that of stainless steel, the price of the alloy is cheaper than that of stainless steel, and the surface treatment of the alloy is richer than that of stainless steel. 1. The hardness of the alloy is lower than that of stainless steel: both take a representative for example, the hardness of 6061-T6 alloy is 47HRB, and the hardness of 304 stainless steel is 92HRB.

2. The price of alloy is cheaper than stainless steel: the material of the alloy is mainly aluminum, with a small amount of manganese and other metals, and the main material of stainless steel is iron; The **** of 6061 alloy is about 18rmb kg, and the **** of 304 stainless steel is about 28-30rmb kg; There is also the density of the alloy is about 2700kg mm 3, and the density of stainless steel is 7900kg mm 3, it is obvious that stainless steel is much more expensive than the alloy. 3. The surface treatment of alloy is richer than that of stainless steel

The surface treatment of alloy includes spraying, electrophoresis, anodizing, etc., while the surface treatment of stainless steel generally only has the surface color whitening treatment, so more often the alloy can play a more aesthetic role. 4. The surface treatment of the alloy is not done well, and there will be oxidation and stains after a period of use, and the surface treatment of stainless steel is relatively simple, so the stability is better, but the later maintenance will also cause rust. Summary:

The construction cost of stainless steel is higher than that of alloy, so there is no shortage of money or public works are basically made of stainless steel, and the owners of the home pay more attention to aesthetics to choose alloy.

Summary. Which alloy or stainless steel is good! Hello, I am glad to answer for you<> which is better, pro-alloy or stainless steel, stainless steel is better.

The tensile strength of ordinary aluminum alloy is more between 35-50MPa, but the strength of the most common 304 stainless steel is 520MPa, and the strength of 304 is not strong in stainless steel. There are many grades of stainless steel and aluminum alloy, and the strength difference between the grades is quite large, and in general, the strength of stainless steel is higher. Their main feature is the high specific strength of aluminum and the strong ability of stainless steel to withstand high temperatures.

Alloy is made of stainless steel with two or more substances (at least one is metal), which has a brightness close to a mirror, hard and cold to the touch, and is a relatively avant-garde decorative material, which is in line with the cool aesthetics of the metal age. Stainless steel materials are usually divided into 1. Ferritic stainless steel.

Chromium content 12% 30%. Its corrosion resistance, toughness and weldability improve with the increase of chromium content, and its chloride stress corrosion resistance is better than that of other types of stainless steel. 2. Austenitic stainless steel.

The chromium content is greater than 18%, and it also contains about 8% nickel and a small amount of molybdenum, titanium, nitrogen and other elements. It has good comprehensive performance and is resistant to corrosion of a variety of media. 3. Austenitic-ferritic duplex stainless steel.

It combines the advantages of austenitic and ferritic stainless steels with superplasticity. 4. Maraging stainless steel. High strength, but poor plasticity and weldability.

So alloy steel includes stainless steel. Hope mine can help you <>

Do you have any other questions?

Which is better, alloy or stainless steel

Which alloy or stainless steel is good! Hello, I am glad to answer for you<> which is better, pro-alloy or stainless steel, stainless steel is better. The tensile strength of ordinary aluminum alloy is more between 35-50MPa, but the strength of the most common 304 stainless steel is 520MPa, and the strength of 304 is not strong in stainless steel.

There are many grades of stainless steel and aluminum alloy, and the strength difference between the grades is quite large, and in general, the strength of stainless steel is higher. Their main feature is the high specific strength of aluminum and the strong ability of stainless steel to withstand high temperatures. Alloy is made of two or more materials (at least one is metal) stainless steel, with a brightness close to the mirror, hard and cold to the touch, and is a relatively avant-garde decorative material, in line with the cool aesthetics of the metal era.

Stainless steel materials are usually divided into 1. Ferritic stainless steel. Chromium content 12% 30%.

Its corrosion resistance, toughness and weldability improve with increasing chromium content, and its resistance to chlorbibi tape stress corrosion is better than that of other types of stainless steel. 2. Austenitic stainless steel. The chromium content is greater than 18%, and it also contains about 8% nickel and a small amount of molybdenum, titanium, nitrogen and other elements.

It has good comprehensive performance and is resistant to corrosion of a variety of media. 3. Austenitic-ferritic duplex stainless steel. It combines the advantages of austenitic and ferritic stainless steels with superplasticity.

4. Maraging stainless steel. High strength, but poor plasticity and weldability. So alloy steel includes stainless steel.

Hope mine can help you <>

Do you have any other questions?

Which is better, alloy steel or stainless steel?

Alloy steel is good.

Stainless steel and alloys, generally stainless steel is better.

The biggest difference between alloy and stainless steel chain is the difference in hardness, price, surface treatment, etc.; The hardness of the alloy is lower than that of stainless steel, the price of the alloy is cheaper than that of stainless steel, and the surface treatment of the alloy is richer than that of stainless steel.

Differences between alloy and stainless steel:

1. The hardness of the alloy is lower than that of stainless steel: both take a representative for example, the hardness of 6061-T6 alloy is 47HRB, and the hardness of 304 stainless steel is 92HRB.

2. The price of alloy is cheaper than stainless steel: the material of the alloy is mainly aluminum, with a small amount of manganese and other metals, and the main material of stainless steel is iron; The **** of 6061 alloy is about 18rmb kg, and the **** of 304 stainless steel is about 28-30rmb kg; In addition, the density of the alloy is about 2700kg mm

3, and the density of stainless steel is 7900kg mm 3, it is obvious that stainless steel is much more expensive than the alloy. 3. The surface treatment of the alloy is richer than that of stainless steel: the surface treatment of the alloy includes spraying, electrophoresis, anodizing, etc., while the surface treatment of stainless steel is generally only whitening of the surface color, so more often the alloy can play a more beautiful role.

2.In terms of hardness, the overall hardness and strength of stainless steel are better.

3.Zinc alloy material, its strength and anti-rust ability are inferior to stainless steel, but its advantage is that it is easy to make complex parts, especially pressure casting, and the locks with more complex patterns seen on the market are mostly made of zinc alloy.

Zinc alloy is an alloy composed of other elements based on zinc. Commonly added alloying elements include aluminum, copper, magnesium, cadmium, lead, titanium and other low-temperature zinc alloys. Zinc alloy has low melting point, good fluidity, fusible welding, brazing and plastic processing, corrosion resistance in the atmosphere, and the residual waste is easy to remelt; However, the creep strength is low, and it is easy to cause dimensional changes due to natural aging.

Prepared by melting, die-casting or pressure processing into timber.

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.

Titanium is a new type of metal, the performance of titanium is related to the content of carbon, nitrogen, hydrogen, oxygen and other impurities, the purest titanium iodide impurity content does not exceed, but its strength is low, high plasticity. The properties of industrial pure titanium are: density = cubic centimeter, melting point 1725, thermal conductivity =, tensile strength b=539MPa, elongation δ=25%, section shrinkage = 25%, elastic modulus e=, hardness HB195.

The density of titanium alloy is generally about cubic centimeters, only 60% of steel, and the density of pure titanium is close to the density of ordinary steel, and some high-strength titanium alloys exceed the strength of many alloy structural steels. Therefore, the specific strength (strength density) of titanium alloy is much greater than that of other metal structural materials, see Table 7-1, which can produce parts with high unit strength, good rigidity and light weight. Titanium alloys are used in the engine components, skeletons, skins, fasteners and landing gear of aircraft.

Stainless steel is steel that is not easy to rust, and in fact, some stainless steel has both stainless steel and acid resistance (corrosion resistance). The stainless steel and corrosion resistance of stainless steel is due to the formation of a chromium-rich oxide film (passivation film) on its surface. This rust and corrosion resistance are relative.

The test shows that the corrosion resistance of steel in weak media such as atmosphere and water and oxidizing media such as nitric acid increases with the increase of chromium content in steel, and when the chromium content reaches a certain percentage, the corrosion resistance of steel undergoes a sudden change, that is, from easy rust to not easy to rust, from non-corrosion resistance to corrosion resistance.

Aluminum alloy has the characteristics of high strength, good corrosion resistance and high heat resistance. And will be widely used in various fields, 304 is a transparent stainless steel, it is widely used in the production of equipment and parts that require good comprehensive performance. In order to maintain the corrosion resistance inherent in stainless steel, steel must contain more than 18% chromium and more than 8% nickel.

So the two are used in completely different places. Each one has its advantages.

The basic composition as well as the mechanical properties are different.

It mainly depends on where you use it, in general, if you use it, 1, it does not bear a lot of weight, and the environment is better. Just use aluminum alloy. 2. Bear a lot of weight, the environment is humid, etc., just use stainless steel.

For example, doors and windows, bicycles and the like, aluminum alloy is better.

Stainless steel, household utensils used in the kitchen are better, such as dining tables and the like, which need to support the weight. In terms of surface luster, the metallic texture emitted by stainless steel is cooler.

Among them, stainless steel is a branch of alloy steel, which is characterized by strong corrosion resistance. Therefore, stainless steel is originally a type of alloy steel. Alloy steels are generally divided into low-alloy steels and high-alloy steels.

Low-alloy steels such as 16Mn, 18MnMonb, etc. are mainly added with a small amount of alloying elements, such as MN, V, MO, NB, etc., to improve the strength, but the cost increase is relatively small.