Stainless steel is a very tough and durable material. Stainless steel is less sensitive to brittleness at high and low temperatures. This not only means that the material will maintain its shape, but also means that at its melting point, it can be welded, cut, manufactured and so on more easily. It is a very hygienic material because it is very easy to clean and disinfect. Its smooth, glossy and non porous surface means that dirt, dirt and bacteria are difficult to stand on its outside.
Our products are usually made of 304 and 316 stainless steel. 304 stainless steel has good processing performance and high toughness, while 316 stainless steel has more molybdenum element. Its corrosion resistance, atmospheric corrosion resistance and high temperature strength are better, and its use effect is also better. It greatly enhances its corrosion resistance to industrial acid and alkaline solution, and makes it particularly elastic in high salt environment.
Stainless steel has oxidation resistance, even at high temperatures. This enables it to maintain its strength very effectively under harsh and extreme temperature conditions. Chromium plays an important role in this regard, making stainless steel an ideal choice for fire prevention and fire prevention. It is superior to galvanized steel and aluminum in this respect.
Stainless steel will not produce corrosion, pitting, rust or wear, and has corrosion resistance, high strength, hygiene, easy cleaning ability and environmental protection performance. It is applicable to various harsh environments. If the surface is painted, the adhesion strength will be higher, but the corrosion resistance will disappear after the zinc layer on the surface is damaged.
Aluminium is a silver-white light metal that is lightweight and resistant to corrosion. In moist air, it can form an oxide film that prevents metal corrosion. Aluminum is an active metal, and a dense oxide film with a thickness of about 50 angstroms is immediately formed on the surface of aluminum in dry air, so that aluminum will not be further oxidized and can be resistant to water.
The density of aluminum is very small, only 2.7g/cm³; although it is relatively soft, it can be made into various aluminum alloys, such as hard aluminum, super hard aluminum, rust-proof aluminum, cast aluminum, etc. Aluminum has good ductility, its ductility is second only to gold and silver, and it can be made into aluminum foil thinner than 0.01mm at 100℃~150℃.
The conductivity of aluminum is second only to silver, copper and gold. Although its conductivity is only 2/3 of that of copper, its density is only 1/3 of that of copper. Therefore, for the same amount of electricity, the quality of aluminum wire is only half of that of copper wire. . The oxide film on the surface of aluminum not only has the ability to resist corrosion, but also has a certain degree of insulation, so aluminum has a wide range of uses in the electrical manufacturing industry, the wire and cable industry and the radio industry.
Aluminum’s good appearance, light weight, machinability, physical and mechanical properties, and corrosion resistance make aluminum and its aluminum alloys considered the most economical and practical in many applications. Aluminum exhibits excellent corrosion resistance under most environmental conditions.
The surface of aluminum is highly reflective. Radiant energy, visible light, radiant heat, and electrical waves are all effectively reflected by aluminum, while anodized and dark anodized surfaces can be reflective or absorptive, polished aluminum over a wide range of wavelengths With excellent reflectivity, it has various decorative uses and uses with reflective functionality.
Copper is a chemical element with symbol Cu and atomic number 29. It is a soft, malleable metal with extremely high thermal and electrical conductivity. Copper is used as a conductor of heat and electricity, as a building material, and as a component of various metal alloys. Copper has good weldability and can be processed into various semi-finished products and finished products by cold and thermoplastic processing.
Copper is one of the few metals that exists in nature in a ready-to-use metallic form (natural metal). Pure copper has a density of 8.96 and a melting point of 1083°C. It has good electrical and thermal conductivity, excellent plasticity, and is easy to be processed by hot pressing and cold pressing.
The electrical conductivity and thermal conductivity of red copper are second only to silver, and are widely used in the production of electrical and thermal conductivity equipment. Copper has good corrosion resistance in the atmosphere, seawater and some non-oxidizing acids (hydrochloric acid, dilute sulfuric acid), alkali, salt solution and various organic acids (acetic acid, citric acid), and is used in the chemical industry.
Copper zinc binary alloy is common brass. Brass with more than three elements is called complex brass. Brass alloys containing less than 36% zinc are composed of solid solutions and have good cold working performance. For example, brass containing 30% zinc is often used to make cartridge cases, commonly known as cartridge case brass or 73 brass. Brass alloys with zinc content between 36% and 42% are composed of and solid solutions, of which the most commonly used is 64 brass with zinc content of 40%. In order to improve the performance of ordinary brass, other elements such as aluminum, nickel, manganese, tin, silicon, lead and so on are often added.
Brass with different mechanical properties can be obtained by changing the content of zinc in brass. The higher the content of zinc in brass, the higher the strength and slightly lower the plasticity. The zinc content of brass used in industry is not more than 45%. However high the zinc content will lead to brittleness and deterioration of alloy properties. Adding 1% tin to brass can significantly improve the corrosion resistance of brass to seawater and marine atmosphere, so it is called “Navy brass”. Most brass have good color, processability and ductility, and are easy to be plated or coated.
Brass is a copper alloy with zinc as the main additive element. It has a beautiful yellow color and is named after its yellow color. Brass has good mechanical properties and wear resistance, and can be used to manufacture precision instruments, ship parts, cartridge cases of guns and guns, etc. Brass sounds good, so gongs, cymbals, bells, horns and other musical instruments are made of brass. It can be used to make ship parts and balancers.
The alloy of copper and tin is called bronze. Bronze generally has good corrosion resistance, wear resistance, castability and excellent mechanical properties. It is used to manufacture precision bearings, high-pressure bearings, mechanical parts on ships that are resistant to seawater corrosion, and various plates, pipes, bars, etc. Another unusual feature of bronze is that it shrinks and expands when it heats up. It is used to cast statues, and it expands after cooling, making it clearer.
Lead bronze is a widely used bearing material for modern engines and grinders. Aluminum bronze has high strength, good wear resistance and corrosion resistance, and is used for casting high-load gears, bushings, marine propellers, etc. Beryllium bronze and phosphor bronze have high elastic limit and good electrical conductivity, and are suitable for the manufacture of precision springs and electrical contact elements. Beryllium bronze is also used to make non-sparking tools used in coal mines and oil depots.
Bronze has a wide crystallization temperature range and poor fluidity. It is not easy to form concentrated shrinkage cavities, but it is easy to form dendrite segregation and dispersed shrinkage cavities. The casting shrinkage rate is small, which is conducive to obtaining castings with a size that is very close to the casting mold, so it is suitable for casting with complex shapes. . The conditions of large wall thickness are not suitable for castings requiring high density and good sealing. Bronze has good anti-friction, anti-magnetic and low temperature toughness.
Nickel is a silver-white metal, magnetic and malleable, with moderate hardness. It is highly polished and corrosion resistant. Nickel is a ferrophilic element. It contains the highest nickel in the earth’s core and is a natural nickel-iron alloy. Mainly used for alloys and as catalysts. The chemical properties are more active, but more stable than iron. It is difficult to oxidize in the air at room temperature, and it is not easy to react with concentrated nitric acid. Can absorb a considerable amount of hydrogen. Nickel is insoluble in water, and forms a dense oxide film on the surface in humid air at room temperature, which can prevent the continued oxidation of the bulk metal.
Nickel comes in different material types such as N2, N4, N6 and N8 depending on the purity. Pure nickel wire mesh is made of nickel wire with a purity of not less than 99%. Nickel woven wire mesh has excellent corrosion resistance, acid and alkali resistance, high electrical conductivity, thermal conductivity and ductility, heat resistance, wear resistance. Nickel wire mesh or low alloy nickel woven wire mesh is useful in chemical processing due to its resistance to various chemicals including acids and bases. It is also useful in electronic devices due to its high conductivity. Nickel wire can also be used for heat exchange due to its thermal conductivity and ductility. It can also be used in military, aerospace, machinery and other fields.
Galvanized is steel, galvanized refers to the surface of metal, alloy or other materials coated with a layer of zinc to play a beautiful, rust prevention and other surface treatment technology. The main method used is hot dip galvanizing. Galvanizing is an economical and effective anticorrosion method that is often used. Zinc is soluble in acid and alkali, so it is called amphoteric metal. Zinc hardly changes in dry air.
Because zinc does not change easily in dry air, and in humid air, the surface can form a very dense film of zinc carbonate, which can effectively protect the interior from corrosion. And when the coating is damaged for some reason and the matrix is not too large, the zinc and steel matrix form a micro cell, so that the fastener matrix becomes the cathode and is protected. It is widely used in automobile transportation and other industries.
Galvanized coating is thick, fine crystallization, uniform and no pores, good corrosion resistance. The galvanized plating layer in acid, alkali corrosion slower, can effectively protect the fasteners matrix galvanized layer formed after chromate passivation, color white, army green, beautiful and easy, have certain adornment sex, because the galvanized layer has good ductility, and therefore can be rushed, rolling, cold bending and forming and not damage the coating.
Titanium is a very active metal, its equilibrium potential is very low, and its thermodynamic corrosion tendency in the medium is large. But in fact, titanium is very stable in many media, such as titanium is corrosion-resistant in oxidizing, neutral and weakly reducing media. This is because titanium and oxygen have a great affinity. In the air or in an oxygen-containing medium, a dense, strong adhesion, and inert oxide film is formed on the surface of titanium, which protects the titanium substrate from being corroded.
Titanium is a non-magnetic metal and will not be magnetized in a large magnetic field. It is non-toxic and has good compatibility with human tissue and blood, so it is used by the medical community. Although the thermal conductivity of titanium metal is lower than that of carbon steel and copper, due to the excellent corrosion resistance of titanium, the wall thickness can be greatly reduced, and the heat exchange between the surface and the steam is dropwise condensation, which reduces the heat group. No scaling can also reduce thermal resistance, so that the heat transfer performance of titanium is significantly improved.
Titanium is light in weight, high in strength, has metallic luster, is resistant to wet chlorine corrosion, and has good low temperature resistance. It has a wide range of applications in shipbuilding industry, chemical industry, manufacturing mechanical parts, telecommunication equipment, cemented carbide and so on.
Tungsten carbide has high hardness, wear resistance and refractory property. These alloys contain 85% – 95% tungsten carbide and 5% – 14% cobalt. Cobalt is used as a binder metal, which makes the alloys have the necessary strength. Some alloys mainly used for processing steel also contain carbides of titanium, tantalum and niobium. All these alloys are made by powder metallurgy.
After smelting, tungsten is a silver white and glossy metal with high melting point, high hardness, low vapor pressure, low evaporation rate and relatively stable chemical properties. It is mainly used for the surface coating of parts with strong wear resistance, such as the valve of aero-engine, the working parts of die hot cutting knife, turbine wheel, excavation equipment and plowshare.