Toxicity of stainless steel and aluminum, difference between aluminum and stainless steel

I think it's better if it's stainless steel! But if you want to buy it, you still have to buy the products of large manufacturers, which are stamped with food-grade stainless steel plates, and the general material is SUS304.

Kettle, that's fine. Aluminum containers should not contain acids or alkalis or salt. Stainless steel must be genuine, there are some markets** lower, containing some other elements. Quality comes first. Where there is quality, there will be safety.

The stainless steel that can be used as a kettle is definitely not toxic, unless it is a black-hearted manufacturer!

Stainless steel is generally non-toxic, unless you use it in some places with strong acidity and alkalinity, it will cause the harmful elements in it to come out and cause harm to the human body!

The aluminum kettle is very safe, and the family has always used the aluminum kettle, and so is the pot!

It is recommended to use stainless steel products produced by regular manufacturers, and the stainless steel products produced in the black factory may contain hexavalent chromium, cadmium and other harmful substances, and have carcinogenic ingredients. The activity of aluminum products is relatively high, and in the early years, due to the lightness and cheapness of aluminum products, the flood of aluminum products in daily life led to the intake of too much aluminum in the human body, which may cause Alzheimer's disease. Therefore, it is recommended to use stainless steel products, which itself is much less active than aluminum and is less likely to be ingested into the body.

weight ratio. Aluminum is generally not as strong as steel, but it is almost one-third the weight of steel. This is the main reason why airplanes are made of aluminum.

Corrosive properties. Stainless steel is made up of iron, chromium, nickel, manganese, and copper. Chromium is added as a reagent to provide corrosion resistance.

In addition, because it is non-porous, it has increased corrosion resistance. Aluminum has high resistance to oxidation and corrosion, mainly because of its passivation layer. When aluminum is oxidized, its surface turns white and sometimes deteriorates.

In some extreme acidic or alkaline environments, aluminum can corrode quickly, with catastrophic consequences.

Thermal conductivity. Aluminum products have better thermal conductivity (thermal conductivity) than stainless steel products. One of the main reasons for use in automotive radiators and air conditioning units.

Cost. Aluminum is generally less expensive than stainless steel.

1. **Different.

Stainless steel is more expensive than aluminum alloy.

2. The hardness is different.

Stainless steel has low density, high strength and good plasticity. Aluminum alloy has a lower hardness than stainless steel.

3. Different high temperature resistance.

Stainless steel is resistant to high temperatures, with a melting point of 1200 to 1500 degrees, and aluminum alloys have a melting point of 500 to 800 degrees.

4. Welding is different.

Stainless steel is relatively easy to weld, while aluminum alloy is difficult.

5. Different industrial applications.

Stainless steel has heat resistance, oxidation resistance, good weldability, and can be applied in the nuclear industry, aviation and aerospace industry, and aluminum alloy does not require high-strength parts and components, such as chemical products, food industry equipment, etc.

Aluminum & Stainless Steel Information:

Aluminum is a silvery-white light metal that is malleable. 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.

Aluminum is a reactive metal, which can form an oxide film to prevent metal corrosion in humid air, and aluminum powder can burn violently when heated in the air, and emit a dazzling white flame. Stainless steel refers to the steel that is resistant to corrosion by weak corrosive media such as air, steam, water and chemical corrosive media such as acid, alkali and salt, and the corrosion resistance of rust steel depends on the alloying elements contained in the steel.

Aluminium alloys are corrosion-resistant because of the corrosion-resistant oxide film on the surface, which prevents further corrosion of the metal inside. Stainless steel mainly contains corrosion-resistant nickel-chromium alloy, so when the field of product application has anti-corrosion requirements, stainless steel is the first choice to make the shell.

Of course, when Zhigao Industry produces aluminum alloy shells, it will enhance the corrosion resistance of aluminum alloy shells with the help of baking paint, electroplating, anodizing and other processes, and the processed aluminum alloy shells can meet the corrosion resistance requirements of most occasions in practical applications.

People often ask what is the difference between stainless steel and aluminum alloy, thinking that there seems to be only a difference between light and heavy, but in fact, although the difference between the two is not so different, but the two in their respective fields have their own duties, even in the same field, the products made are very different. For example, if you want to make a high-strength railing, you have to consider making a stainless steel railing; If you want something cheaper, aluminum alloy railings will be a good choice.

In general, the difference between stainless steel and aluminum alloy is as follows:

1.**Stainless steel is expensive, aluminum alloy is cheap;

2.Stainless steel has a higher hardness than aluminum alloy;

5.In terms of surface treatment, aluminum alloys are more abundant, including electrophoresis, spraying, anodizing, etc., and stainless steel is less;

6.Aluminum alloy with poor surface treatment will oxidize after a long time and will have marks; Stainless steel is relatively better, but the composition is not up to standard or the maintenance is careless, and it still rusts;

4.There are many bad manufacturers of stainless steel, mainly cutting corners in terms of material thickness and composition;

The unspoken rules of the domestic stainless steel industry:

1.At present, the thickness of domestic 304 stainless steel is not up to standard, and it is marked as 1mm, which is at least poor;

2.It is marked as 304, but in fact, many are 201;

3.What is marked as imported is actually a lot of domestic production, especially in Guangdong, but only some raw materials are imported.

What exactly is the difference between stainless steel 304 and 316? I finally understand today, don't be cheated again! When buying cutlery, choose stainless steel 304 or 316?

The master said that he missed his mouth, don't buy the difference between stainless steel 304 and 316 in the future, which stainless steel 304 and 316 should be chosen.

The former is light, the latter is heavy and corrosion-resistant.

Aluminum alloy has low density, but relatively high strength, close to or more than high-quality steel, good plasticity, can be processed into various profiles, has excellent electrical conductivity, thermal conductivity and corrosion resistance, is widely used in industry, and the amount of use is second only to steel.

Some aluminum alloys can be heat treated to obtain good mechanical, physical and corrosion resistance. It can be strengthened by heat treatment It is characterized by high hardness, but poor plasticity. However, it has poor corrosion resistance, fast softening at high temperature, excellent thermoplasticity, and is suitable for forging, so it is also called forged aluminum alloy.

Stainless steel is mainly nickel-chromium alloy, which is corrosion-resistant. When there is a requirement for corrosion resistance to what is being produced, stainless steel will definitely be used. Secondly, the surface of stainless steel can be processed as needed, and the appearance is more beautiful and smooth than aluminum alloy.

But the cost of stainless steel is higher than aluminum alloy, and now there is no shortage of money or stainless steel is basically used in public works, in short, it is beautiful, not easy to rust, and not easy to destroy.

1.The density is different, the density of aluminum alloy is: gram cm, and the density of stainless steel is gram cm.

2.The composition is different, the main components of aluminum alloy are: aluminum, and the main components of stainless steel are:

Chromium-nickel steel, etc. 3.Corrosion resistance is different, and stainless steel is more resistant to corrosion.

1. Characteristics:

Aluminum alloy: low density, but relatively high strength, close to or more than high-quality steel.

Stainless steel: good weldability and strong corrosion resistance. The vast majority of stainless steel products require good corrosion resistance.

2. Hardness: stainless steel has low density, but high strength, close to steel, and good plasticity. Stainless steel is a nickel-chromium alloy that has a higher hardness than aluminum alloy.

3. High temperature resistance: stainless steel can withstand high temperature, with a melting point of 1200-1500 degrees, while aluminum alloy cannot withstand too high a temperature, with a melting point of 500-800 degrees.

4. Surface treatment:

The surface treatment of stainless steel includes surface brightening treatment, surface whitening treatment, and surface coloring treatment. Aluminum alloy treatment includes electrophoresis, spraying, anodizing, etc.

5. Industrial applications:

Stainless steel has heat resistance, oxidation resistance, good formability and good weldability, and can be used as an ultra-high-strength material in the nuclear industry, aviation and aerospace industry; Aluminium alloys are used to process parts that require good formability but do not require high strength, such as chemical products, food industry equipment and storage containers, printing plates, nameplates, reflectors, etc.

Aluminum alloys are not toxic.

Aluminum alloy for tableware is also non-toxic. Although aluminum alloy tableware is non-toxic, light and durable, long-term use of aluminum alloy tableware will lead to excessive accumulation of aluminum in the human body, which will accelerate aging and have a negative impact on people's memory. Excessive accumulation of aluminum in the body can damage human brain cells, which can affect brain cell function, leading to memory loss and sluggish thinking ability.

The World Health Organization stipulates that the daily intake of aluminium by the human body should be controlled below grams, and under normal circumstances, a person's daily intake of aluminium should never exceed this amount. However, if you regularly eat the fried meals made of aluminum cooking utensils, it will increase the amount of aluminum intake. Do not use aluminum tableware to contact acidic and alkaline substances, because acidity and alkalinity will have a chemical reaction with aluminum, aluminum basins should not be used to store meals for a long time and hold salty food for a long time, and should not be scraped with aluminum shovels.

Do not use with iron cutlery. Aluminum alloy tableware cannot be cleaned with steel wool balls.

The difference between aluminum alloy and stainless steel is: different strength, hardness, different load-bearing capacity, and different high temperature resistance.

1. The strength, hardness and bearing capacity are different.

The density of aluminum alloy is low, the weight under the same volume is smaller than that of stainless steel, the strength of aluminum bending gold is similar to that of stainless steel, the hardness of aluminum alloy is lower than that of stainless steel, and the plasticity is better than that of stainless steel.

2. The high temperature resistance is different.

The melting point of stainless steel is 1200 to 1500 degrees Celsius, and the melting point of aluminum alloy is 500 to 800 degrees Celsius.

Uses of aluminum alloys and stainless steel:

Aluminum alloy is the main material used in the manufacture of aircraft. Compared with the mild steel used in the manufacture of automobiles, aluminum alloy is expensive and small, and the relative density is, compared with the relative density of mild steel, about one-third lighter, although the strength is almost the same, but for the aircraft, the material is lighter and more important, and the corrosion resistance is strong, and the processing is also convenient, so aluminum alloy is an ideal material for the manufacture of aircraft.

Duralumin can be used to manufacture rivets, propellers of flying rough machines and high-strength parts on aircraft according to their different alloying element content; Superduralumin is a duralumin containing zinc, its hardness and strength are higher than duralumin, different varieties of duralumin are used to manufacture various structural parts, high-load parts, is one of the important materials in the aviation industry.

Stainless steel is widely used in tableware, household appliances, machinery manufacturing, building decoration, coal, petrochemical and other fields due to its good corrosion resistance, heat resistance, low temperature resistance and other properties. <>