I. Aluminum alloy:

1. The density of aluminum alloy varies according to the alloying elements added during aluminum alloy forging, and is generally between 2.5 and 2.88.

2. Pure aluminum has a low density (ρ=2.7g/cm3), about 1/3 of that of iron, and a low melting point (660℃).

3. Aluminum has a face-centered cubic structure, so it has high plasticity (δ:32~40%, ψ:70~90%).

4. It is easy to process, can be made into various profiles and plates, and has good corrosion resistance; But the strength of pure aluminum is very low.

5. Aluminum alloy profile is the most widely used non-ferrous metal structural material in industry, and its quality depends on its density; (It also has great influence on die casting and surface treatment).

2. Zinc alloy: zinc-aluminum alloy 6.3g/cm3; cast zinc-aluminum alloy 6.75g/cm3.

1. Relative proportion is significant.

2. The casting performance is good, precision parts with complex shapes and thin walls can be die-cast, and the casting surface is smooth.

3. Surface treatment: electroplating, spraying, painting, polishing, grinding, etc.

4. When melting and die casting, it does not absorb iron, does not corrode molding and does not stick to the mold.

5. It has good mechanical properties and wear resistance at room temperature.

6. Low melting point, melting at 385℃, easy to die casting.

III. Stainless steel:

Stainless Steel is the abbreviation of stainless and acid-resistant steel, and the steel resistant to weak corrosive media such as air, steam and water or stainless steel is called stainless steel. The steel that is resistant to chemical medium corrosion (acid, alkali, salt and other chemical etching) is called acid-resistant steel. Because of their differences in chemical composition, their corrosion resistance is different. Ordinary stainless steel is generally not resistant to chemical medium corrosion, while acid-resistant steel is generally stainless. It has good formability and weldability, and can be used as an ultra-high strength material in nuclear industry, aviation and aerospace industry. It can be divided into Cr series (400 series), Cr-Ni series (300 series), Cr-Mn-Ni series (200 series), heat-resistant chromium alloy steel (500 series) and precipitation hardening series (600 series). Material: stainless steel wires such as SUS201, 202, 302, 304, 316, 304L, 316L and 321. 

There are many ways to identify the material:

1. Stainless steel reagent: Drop the liquid medicine on the stainless steel surface for two to three minutes, and judge it according to the diagram. After the test, rinse it with clear water.

2. Magnetic attraction identification: Touch it with a magnet to see if it attracts magnetism. Unless otherwise specified, it does not attract magnetism in general. If it does, it may be replaced by low-grade ferrite material (such as 430).

3. Identification of color.

4. Comparison of chemical composition of stainless steel.

Link-B2B is a professional supplier listing service platform which will provide high quality and trustworthy supplier list to international buyers. If you are looking for aluminum alloy suppliers, feel free to visit Link-B2B.com and send a request.