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Hot galvanized sheet is hot rolled galvanized sheet, cold galvanized sheet is cold rolled galvanized sheet. From the material point of view, the composition of the two galvanized sheets are basically similar, the difference is that the cold galvanized sheet is thinner than the hot galvanized sheet, the surface quality is better, the process is more complex, and the price is higher. From the process point of view, the steel is rolled by hot rolling, rolled into a certain thickness of the plate, such as the thickness of 10mm or so, if the user has no higher requirements for the surface of the plate, thickness, mechanical strength, it can be processed as a finished product, such as galvanized, sold directly, is a hot plate. If there are higher requirements for the plate, then the hot-rolled plate is sent to the cold rolling line for re-processing, after pickling, annealing, re-rolling and other processes, to get a thinner, smooth surface and better mechanical properties of the cold-rolled plate.
1. Different references
1. cold binding plate: hot rolled coil as raw material, at room temperature under the recrystallization temperature to stop rolling products.
2. galvanized plate: refers to the appearance of a layer of zinc plated steel plate.
Second. different characteristics
1. cold binding plate: because it does not stop heating, there is no pitting and oxide sheet defects that are often presented in hot rolling, and the appearance is good and the brightness is high. Moreover, the dimensional accuracy of cold-rolled products is high, and the performance and organization of products can meet some special application requirements, such as electromagnetic properties and deep drawing properties.
2. galvanized sheet: Galvanized sheet due to the different treatment methods in the plating process, the appearance of the state is different, such as ordinary zinc flowers, fine zinc flowers, flat zinc flowers, zinc flowers and phosphating treatment appearance. The German code also rules for appearance levels.
Three. different uses
1. cold tie plate: mostly used in automobile manufacturing, electrical products and so on.
2. Galvanized sheet: mainly used in construction, light industry, automobile, agriculture, animal husbandry, fishery and commercial industries. The construction industry is mainly used for the manufacture of anti-corrosion industrial and civil building roof panels, roof grilles, etc. The light industry uses it to manufacture home appliance housings, civil chimneys, kitchen utensils and so on.
"Galvanized sheet 275g/㎡" means that the sum of the double-sided galvanized amount of the galvanized sheet per square meter area is 275 grams. The zinc flowers of hot dip galvanized steel plate are larger and more obvious, called "zinc flowers", and the zinc flowers are not fine enough, called "no zinc flowers".
What does having flowers and no flowers mean which is more expensive?
The zinc flowers of hot dip galvanized steel plate are larger and more obvious, called "zinc flowers", and the zinc flowers are finer and less obvious, called "no zinc flowers".
The hot plate substrate is generally made of zinc flowers, the cold plate substrate is generally made of no zinc flowers, and the cold plate is made of no zinc flowers, the surface is more smooth and smooth, the hardness is low, the elongation is high, the directional consistency is good, and the price is more expensive.
Galvanized sheet flowers and flowers are differentiated according to the surface state of galvanized sheet, generally weak eye will know, the surface has a pattern is flowers, there is no flowers. Flowers and no flowers have nothing to do with the material. The material depends on the substrate used for galvanizing, such as Q195, Q345, SPCC and so on. There is also no relationship between thickness and presence of zinc flowers.
There is a galvanized sheet, that is, the surface of the galvanized sheet is printed with a pattern, the appearance looks very bright, beautiful, and is generally used to make home appliance shells, buckets, and so on. There is no pattern on the surface of the flowerless galvanized sheet, which looks not as bright as the flowered galvanized sheet, dark color, and cold plate. There is no difference in performance, mainly in appearance.
There is a flower is the surface of the board has a pattern like a leaf, but also divided into small zinc flowers with large zinc flowers, no flowers is like aluminum plate, flat what pattern is not there
The main materials of Marine steel plates are carbon steel and alloy steel.
First, carbon steel ship plate
Carbon steel mainly refers to ordinary steel with carbon content between 0.05-2.0%. Carbon steel ship plate is widely used in various types of ships, which is characterized by high strength, good toughness, good weldability and low cost. In addition, the reliability of carbon steel materials is high and can withstand strong hot and cold deformation, which is necessary for Marine steel plates.
The main disadvantage of carbon steel ship plates is that they are susceptible to corrosion by seawater and air, so special anti-corrosion treatment is required, including painting and the use of anti-rust coatings. At the same time, the service life of the carbon steel ship plate is also relatively short, and it needs to be replaced frequently.
Second, alloy steel ship plate
Compared with carbon steel, alloy steel ship plate has lower carbon content and adds a certain proportion of alloying elements, such as manganese, silicon, chromium, tungsten, molybdenum, etc., to increase the strength and corrosion resistance of steel. Alloy steel ship plates are more resistant to corrosion and last longer than carbon steel ship plates.
Alloy steel ship plate has the following characteristics:
1. High strength: The addition of alloying elements can improve the strength of steel and enhance the carrying capacity.
2. Good corrosion resistance: the alloy elements such as chromium not only increase the strength of the steel, but also form a dense chromium oxide film, which can prevent further corrosion.
3. Good cold working performance: compared with ordinary steel, alloy steel can better withstand strong hot and cold deformation, and it is not easy to produce surface cracking, fracture and other phenomena.
The choice of Marine steel plate material depends on many factors such as the ship's use environment, transportation volume and economic cost. Factors such as physical and chemical properties, corrosion resistance, cost and processing difficulty need to be considered when selecting materials.
In the process of welding, cracks, pores or softened structures are easy to appear inside the molten core. Especially in the spot welding process of galvanized steel plate, if the welding specification is not reasonable, it may lead to some problems. First, some zinc and zinc-iron alloys may remain in the joint. These residues may form fine cracks or pores in the process of crystallization. This is because the high temperature during the welding process will cause physical or chemical reactions between zinc and zinc-iron alloys, which changes the physical properties of the molten core, making it more prone to cracks or pores. Secondly, if the residual zinc is more, it may also form softened tissue. This is because zinc reacts with the steel matrix during the welding process to form a zinc-iron alloy, which is lower in hardness and strength than steel, so it can lead to the softening of the molten core.
What is the chemical composition of Alloy 600?
The chemical composition of Alloy 600 is as follows:
Nickel (Ni) : Minimum value is 72%
Chromium (Cr) : The minimum value is 14%, the maximum is 17%
Iron (Fe) : Minimum value is 6.0%, maximum value is 10.0%
Carbon (C) : A maximum of 0.15%
Manganese (Mn) : Maximum value is 1.0%
Silicon (Si) : The maximum value is 0.5%
Copper (Cu) : The maximum value is 0.05%
Aluminum (Al) : A maximum of 0.3%
Titanium (Ti) : A maximum of 0.3%
Boron (B) : Maximum value is 0.006%
Phosphorus (P) : Maximum value is 0.015%
Sulfur (S) : Maximum value is 0.015%
Hot-dip galvanized channel steel, also known as hot-dip zinc channel steel and hot-dip galvanized channel steel, is an effective way to prevent metal corrosion. It is to immerse the channel steel after rust removal into the melting zinc liquid about 440~460℃, so that the surface of the channel steel is attached to the zinc layer, so as to play the purpose of anti-corrosion.
Zinc-steel balcony guardrail has the following characteristics:
1. welding free assembly design, quick and simple installation.
2. four layers of anti-corrosion treatment, more than 20 years of service life, to solve the traditional products in a short time of rust, powder, cracking and other problems, eliminating product maintenance and update costs.
3. good decorative, rich color, to meet the individual needs of different customers.
4. environmental protection, does not pollute the environment, to solve the problem of ordinary products polluting buildings.
5. good flexibility, the rigidity and flexibility of the substrate make the guardrail products have better impact resistance.
6. electrostatic spraying of the surface of the imitation pond porcelain process, so that the guardrail products have good self-cleaning performance, rain wash and water gun spray can be clean as new.
7. buried installation mode and foot plate installation, that is, save your building foundation costs, but also save land resources.
8. good weather resistance, salt spray resistance and moisture and heat resistance, suitable for use in different regions. Steel stamping accessories, stamping guardrail accessories 32t connector 35t connector 40t connector 45t connector U-card 30*40LN bracket 35LN bracket 40 several brackets ð
304 stainless steel plate and Q345 carbon steel plate can be welded. The welding of stainless steel and Q345 belongs to the welding between low carbon steel and austenitic stainless steel in this kind of dissimilar steel welded joint, due to its working conditions have intergranular corrosion and stress corrosion problems, usually choose E309 type welding material, but when the welding joint is in a higher temperature environment (design temperature ≥315℃), In order to prevent the migration of carbon during the working process, welding materials with a high nickel alloy content (such as InCONel 182 electrode, etc.) are usually used.
As a widely used material, stainless steel has many excellent performance characteristics. First of all, the corrosion resistance of stainless steel is very good. Due to its chromium element, the stainless steel surface forms a dense chromium oxide protective film, which effectively prevents the metal from contacting with corrosive media such as air and water, thus significantly extending the service life of the material.
Secondly, stainless steel has good high temperature resistance. Under high temperature environment, stainless steel can still maintain stable performance and is not easy to deform or melt. This makes stainless steel in the industrial field has a wide range of applications, such as the manufacture of stoves, boilers, heat exchangers and other equipment.
In addition, stainless steel also has good strength and hardness. Its high strength and high hardness make the stainless steel perform well when bearing heavy loads and shocks, and it is not easy to break or deformation. Therefore, stainless steel is often used in the production of building structures, auto parts, medical equipment and other fields.
In addition, stainless steel also has good machinability and weldability. It can be cut, stamped, bent and other operations through various processing processes, and is easy to weld with other metal materials, which facilitates the manufacture and maintenance of products.
Finally, stainless steel also has a beautiful and generous appearance. Its smooth surface and silver-white color make it an ideal decorative material, which is widely used in kitchen utensils, home appliances, architectural decoration and other fields.
In summary, stainless steel shows excellent performance characteristics in corrosion resistance, high temperature resistance, strength and hardness, machinability and weldability, as well as aesthetics, making it an indispensable and important material in many fields.
Color fingerprint-free stainless steel plate with easy to clean the surface stains, do not need metal cleaning agents, some chemical agents will make the stainless steel surface black; Moreover, it is not easy to stick handprints, dust, feel delicate, and has super fingerprint resistance and anti-fouling effect.
When the color fingerprint-free stainless steel plate is used, it should also be noted that the transparent film layer without fingerprints can directly protect the metal surface from being easily scratched, because the surface electroplated oil has good film property, high hardness, and is not easy to peel, powder, yellowing, etc.; If the color fingerprint-free stainless steel plate is processed by fingerprint-free technology, the texture of its appearance will be stronger, it will have an oily moistening, feel more soft, and it can better retain its good metal texture.
201L stainless steel is an austenitic chromium-nickel-manganese stainless steel known for its excellent corrosion resistance, high ductility and low carbon content. The composition of 201L stainless steel consists of approximately 17-19% chromium, 4-6% nickel and 1-2% manganese, and a small amount of nitrogen is added to enhance its mechanical properties. Compared to other stainless steel grades, the carbon content is reduced, ensuring improved solderability and resistance to intergranular corrosion. The combination of these elements produces stainless steel alloys that are not only highly resistant to various corrosive environments, including acidic and alkaline conditions, but also exhibit excellent formability, making them ideal for a variety of manufacturing processes. Its properties make 201L stainless steel ideal for applications in industries such as construction, automotive and kitchenware, where durability and oxidation resistance are critical.
202 stainless steel is a popular multifunctional alloy known for its excellent composition and performance characteristics. It is mainly composed of chromium, nickel, manganese and nitrogen, and has excellent corrosion resistance and oxidation resistance, making it ideal for a variety of industrial and household applications. This austenitic stainless steel also has excellent toughness, strength and formability, allowing it to be easily machined into different shapes and structures. In addition, the addition of nitrogen enhances its mechanical properties, making it more durable and stronger than other stainless steel grades. With so many features in combination, 202 stainless steel has excellent performance in different environments, making it a reliable choice for a variety of buildings, kitchenware, automotive parts, and many other uses.
Some of the main advantages of 316 stainless steel:
Heat and cold resistance: 316 stainless steel performs well at temperatures up to 800°C.
Rust and wear resistance: Compared with other stainless steel grades, 316 has excellent rust and wear resistance.
Corrosion resistance: Adding molybdenum to 316 stainless steel can improve its resistance to acid, alkali and chloride pitting.
Easy to form and weld: 316 stainless steel is easy to weld with TIG or MIG welding and does not require post-weld annealing. After annealing, it is non-magnetic. 316 stainless steel can also be easily formed by braking or rolling molding.
Durability: It has a tensile strength of 515 MPa and maintains its corrosion resistance with minimal maintenance.
Hygiene: This grade of stainless steel is ideal for hygienic applications as it is easy to clean and disinfect.
Sustainability: 316 stainless steel is 100% recyclable.
The main use of galvanizing is to prevent metal surface corrosion and oxidation.
Mainly used in the following fields:
Construction: Galvanized steel is widely used in the construction industry, such as building frames, roofs and walls. This is because galvanized steel has corrosion resistance and durability, which can extend the service life of the building.
Automotive industry: Galvanized steel is widely used in the automotive manufacturing industry, such as the manufacture of body and chassis. This is because galvanized steel can prevent the corrosion and oxidation of metal parts of the car, thereby extending the service life of the car.
Electrical industry: Cable tubes and cable jackets are usually made of galvanized steel pipes. This is because galvanized steel pipe has corrosion resistance and durability, and can be used in different environments for a long time.
Agriculture and aquaculture: Galvanized steel wire mesh and galvanized steel pipe are widely used in the agriculture and aquaculture industry, such as for fences, poultry houses and livestock houses. This is because galvanized steel wire mesh and galvanized steel pipe can prevent rust and corrosion, thereby extending the service life.
Machinery industry: Galvanized steel plates and galvanized steel pipes are widely used in the machinery manufacturing industry, such as the manufacture of mechanical parts and pipes. This is because galvanized steel plates and galvanized steel pipes have good anti-corrosion properties, which can extend the service life of mechanical equipment.
Zinc-iron alloy plate is also called alloyed galvanized plate. The alloying process heats the galvanized strip through the alloying furnace to 550~560 ° C in 5~10 seconds in order to convert the pure zinc layer into an iron-zinc alloy. Its weldability, coating performance, heat resistance, corrosion resistance are better than ordinary galvanized sheet.
Performance and characteristics
1. Suitable for alkaline low iron zinc iron alloy process, coating iron content 0.3 ~ 0.8%;
2. Fine crystal coating, brightness is white;
3. The alloy coating is easy to passivation, and the corrosion resistance of the alloy coating after passivation is more than three times that of the zinc layer passivation;
4. Stable plating solution, easy to maintain, can be hung plating or roll plating (including automatic line);
5. The cost is relatively low, and the original equipment can be used to turn the original zincate galvanizing liquid into a trough.
Use
By alloying, it can be made into superalloy or super alloy, corrosion resistant alloy, high resistance alloy, electric vacuum alloy and other materials with special properties. Widely used in aerospace, aviation, shipbuilding, electronics, electrical, machinery, chemical, electroplating and other industrial sectors.
In the early days, there were more zinc-iron alloys in automobiles, such as gasoline pumps, carburetors, and so on.
Because the surface galvanized liquid contains iron, so the welding performance is better than ordinary galvanized, also has rust resistance and corrosion resistance, the application is very wide.
Due to the different use of each product, its processing technology and raw material quality requirements are also different. Generally speaking, stainless steel products are different, its requirements for raw material thickness tolerances are also different, such as class II tableware and thermos cups, etc., thickness tolerances are generally higher, of -3~5%, and a class of tableware thickness tolerances generally require -5%, steel pipe requirements -10%, hotel freezer thickness tolerances are -8%. Dealers' requirements for thickness tolerances are generally between -4% and 6%. At the same time, the different sales of products at home and abroad will also lead to the different requirements of customers on the thickness tolerance of raw materials. Generally, customers of export products have higher thickness tolerance requirements, while domestic enterprises have relatively low thickness tolerance requirements (mostly due to cost considerations), and some customers even require -15%.
DDQ (deep drawing quality) material: refers to the material used for deep drawing (drawing), that is, the soft material that we say, the main characteristics of this material are high elongation (≧53%), low hardness (≦170%), the internal grain grade is between 7.0 and 8.0, and the deep drawing performance is excellent. Many enterprises that produce thermos bottles and POTS, the processing ratio of their products (BLANKING SIZE/ product diameter) is generally relatively high, and their processing ratios reach 3.0, 1.96, 2.13, and 1.98, respectively. SUS304DDQ materials are mainly used for these products that require a higher processing ratio, of course, products with a processing ratio of more than 2.0 generally need to be completed after several stretches. If the extension of raw materials can not be reached, the phenomenon of cracking and pulling through is easy to occur in the processing of deep-drawn products, which affects the qualified rate of finished products, and of course increases the cost of manufacturers;
② General materials: Mainly used for materials other than DDQ purposes, this material is characterized by relatively low elongation (≧45%), relatively high hardness (≦180HB), internal grain size grade between 8.0 and 9.0, compared with DDQ materials, its deep drawing performance is relatively poor, it is mainly used for products that can be obtained without stretching. Like a type of tableware spoon, spoon, fork, electrical appliances, steel pipe use. However, it has an advantage compared with DDQ materials, that is, the BQ property is relatively good, mainly due to its slightly higher hardness.
Stainless steel sheet is a low price material, but customers have very high requirements for its surface quality. Stainless sheet in the production process will inevitably appear a variety of defects, such as scratches, pitting, sand holes, dark lines, creases, pollution, etc., so that its surface quality, such as scratches, creases and other defects are not allowed to appear in advanced materials, and pitting, sand holes this defect in the spoon, spoon, fork, production is also never allowed, because it is difficult to throw it away when polishing. It is necessary to determine the surface quality level according to the degree and frequency of various defects on the surface, so as to determine the product grade.
First, will galvanized steel rust
1. Galvanized steel sheet will rust, according to the different environment of galvanized steel sheet, the reaction is not the same, if the galvanized steel sheet is placed outdoors for a long time, galvanized steel sheet will rust, if the galvanized sheet is placed indoors, and keep dry, do not let the galvanized steel sheet with water stains and corrosion liquid, then the galvanized sheet rust time will also be extended.
2. Galvanized steel plate corrosion and rust is a normal phenomenon, because the galvanized steel plate contains other impurities, such as iron and zinc and other metals, this is easy to produce corrosion effect, resulting in galvanized sheet rust.
3. Although the galvanized steel plate has a certain corrosion resistance and rust resistance, the ability of the galvanized steel plate is limited, if it is placed in a harsh environment for a long time, all the steel plates will rust.
4. Galvanized steel plate is also divided into cold galvanized steel plate and hot plated galvanized steel plate, usually cold galvanized steel plate is easier to rust, and hot galvanized steel plate is not easy to rust.
Second, why will galvanized steel rust
1. The uneven thickness of the galvanized steel sheet is likely to rust, and then drive the thick place, so that the entire galvanized steel sheet will rust.
2. Under normal circumstances, the galvanized steel plate at home is not suitable for being placed in a humid environment, and if the galvanized steel plate is placed in a humid environment for a long time, the galvanized steel plate will rust quickly.
Molded plate is a kind of steel plate with high strength and durability, which is mostly used for architectural decoration. Due to the use of high-strength steel plate, coupled with a reasonable size design, so that it is widely used in a variety of building roof, wall, easy installation, flexible, never limited by any factors in the building.
Main uses of color molded steel plate:
Used for all kinds of roof, wall decoration, all kinds of internal and external assembly materials, suitable for any building requirements.
Color molded steel plate material:
Color coated steel plate, hot dip galvanized steel plate, aluminum alloy steel plate, can be freely selected according to needs.
Color molded steel plate quality characteristics:
1.excellent waterproof performance
After the site assembly of the intersection treatment, in the case of roof slope > 4%, it can withstand any adverse weather conditions.
2. widely used
It can be combined with various insulation materials and various bottom layers to form thermal insulation or non-thermal insulation roofing. The length can be fixed according to the need to avoid longitudinal lap, thus eliminating the possibility of water leakage. Symmetrical appearance, no fastening screws exposed, neat and beautiful, excellent anti-corrosion performance. The hook type mechanical fixation is firm and reliable, and can withstand the change of thermal expansion. Beautiful appearance, easy installation, smooth drainage, economic building materials!
1. the reliability of galvanized steel plate is good, galvanized layer and steel is metallurgical combination, become a part of the surface, so the durability of the coating is more reliable.
2. galvanized steel plate has corrosion resistance. Galvanized steel plate is to prevent corrosion on the surface of the steel plate to extend its service life, coated with a layer of metal zinc on the surface of the steel plate, this zinc coated steel plate is called galvanized steel plate. Galvanizing is an economical and effective rust prevention method that is often used, and about half of the world's zinc production is used in this process. Galvanized steel plate is an important steel anti-corrosion plate, not only because zinc can form a dense protective layer on the surface of the steel, but also because zinc has a cathodic protection effect, when the galvanized layer is damaged, it can still prevent the corrosion of the iron base material through cathodic protection.
3. galvanized steel coating toughness, galvanized layer forms a special metallurgical structure, this structure can withstand mechanical damage during transport and use.