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.

Decarbonization is not only related to temperature, but also depends on the type of metal or alloy, and depends on the heating medium. For example, silicon steel is easy to decarbonize, stainless steel is not easy to decarbonize, heat-resistant steel is not easy to decarbonize, if it is a reducing medium, you heat to the melting state will not decarbonize, if it is an oxidizing medium, it mainly depends on the level of oxidation, if it is heated in the air, the decarbonization situation is more difficult to say, only specific problem specific analysis, general carbon steel about 570 Degree produces strong oxidation decarburization.

Decarbonization or not has a lot to do with chemical composition, heating temperature, holding time, the existence form of carbon in the metallographic organization, and environmental atmosphere. Chemical composition alone cannot determine the heating temperature required to decarbonize the surface of the material.

The surface decarburization of steel materials is related to the carbon content or carbon equivalent. Taking 60Si2Mn as an example, the decarburization sensitive zone is about 1150-1250 degrees.

Decarbonization is also related to the heating atmosphere and heating time.

Another thing to consider is that oxidation and decarbonization generally exist at the same time, if the oxidation rate is greater than decarbonization, then even in the high temperature zone will not cause material decarbonization, but the surface oxide thickness increases. 35CrMo is generally used for the production of high-strength fasteners, which generally requires the spinning temperature not to exceed 880 degrees, the cooling speed in the range of 0.8-0.85 degrees /s, and the decarburization layer can be controlled between (0.2-0.4)D%. This decarbonized layer is tolerable and subsequent cold heading and mechanical properties can be guaranteed.

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.

The use of cast iron fence has been fully recognized by everyone, when we need to install, we have to communicate with the construction person in charge, and put forward your opinions to help them improve the construction plan and meet your requirements.

1. when the construction party will give you the copy, you have to sketch in your mind what kind of fence structure it will be, you can ask the construction party to do a simple modeling for you, for your own requirements to adjust.

2. when the construction plan is determined, you can ask the construction personnel to purchase the raw materials needed to build the guardrail, because often the selectivity of this guardrail is very much, different production processes, the quality of the products produced is different, and the choice of cast iron guardrail pattern depends on your own, according to different occasions to choose atmospheric or elegant.

3. When the material is purchased, the sample size should be made according to the actual situation and minor modifications should be made. The next installation process can be handed over to the construction side, until the installation is completed, you can go over to check. For example, whether the Angle of assembly is accurate, whether the welding parts are integrated into one, whether the overall installation is neat, coordinated, and so on. According to your requirements, the product should be treated with rust, paint or other security measures.

The pedestrian barrier is commonly made of steel, such as stainless steel, round steel pipe, square steel pipe or pressed steel plate, iron wire. Surface treatment process: automatic electrostatic powder spraying (i.e. spraying) or spray painting. In recent years, it is also more popular to plug in aluminum alloy materials and assemble fences.

USE

The posts of the pedestrian fence are secured to the ground by expansion bolts. Usually installed on both sides of the logistics channel, around the production equipment, building corners, both sides of the door and the edge of the cargo platform, etc.

Effectively reduce the damage of equipment and facilities caused by accidental impact when transporting equipment shuttles back and forth.

Pedestrian fence materials are: aluminum alloy, malleable steel (ductile iron), carbon steel (sprayed or galvanized), stainless steel, plastic steel, zinc steel, PVC and other metal fences.

In addition, the logistics handling equipment itself also plays a protective role.

1. according to the material classification of iron art, aluminum art, stainless steel.

2. divided into protective Windows and anti-theft nets according to use.

3. according to the installation method can be divided into assembly fence and plug-in fence, which assembly fence is divided into welding and screw connection type; The plug-in type can be divided into two forms of pvc lining and external coating;

4. According to the appearance, there are two kinds of galvanized spray plastic and hot-dip galvanized;

5. from the use of function, including the railing with small grid spacing, for the isolation of the edge of the flower bed and the isolation of the lawn border.

6. from the safety performance points, the fence can be divided into a and s (anti-climbing).

7. according to the regulations: "outside window sill from the floor, the ground of the net height of less than 0.9m should have protective facilities." Therefore, for high-rise buildings, protective facilities should be installed in order to ensure the safety of occupants.

8. the railing used in public places is generally beautiful, but sometimes it will play a certain security role.

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.

1. The advantages of galvanized steel plate as a flower bed:

Galvanized steel plate as a flower bed has corrosion resistance, reliability, and galvanized steel plate as a flower bed can be good oxidation resistance, durable use, is a very good plate type. The surface oxidation resistance is strong, and the corrosion resistance inside the flower bed can be strengthened.

Galvanized steel plate as a flower bed has the advantages of integrity and maintenance-free, so that every part of the surface of the plating can be well and evenly plated with zinc, even in the depression, sharp corners and hidden places can be fully zinc. The galvanized steel plate is durable and used in the flower bed, and the standardized galvanized rust prevention layer in the outdoor environment can be maintained for 10 years without repair.

2. the shortcomings of galvanized steel plate to do flower beds

When the galvanized steel plate does subsequent processing of the flower bed, it may show linear dark lines on the surface of the board, and there are bumps and obvious tactile feelings in serious cases, sometimes it is not clearly visible, and it is easy to show dark lines or black spots. Therefore, the general galvanized steel flower box will add a layer of high temperature paint, which is not only more beautiful, but also waterproof and rust prevention and a layer of protection.

Due to the long-term exposure to the outside, the wind and the sun will definitely have a lot of dust. At this time, it is necessary to consider how to clean the stadium fence. If it is not cleaned properly, it will inevitably accelerate the aging of PVC and affect it. After sorting out the appearance, the following method is obtained, and the method of how to maintain the pvc chain link fence is attached!

Stadium fence cleaning:

1. If there is dust on the surface of the stadium fence and dirt that is easy to remove, it can be washed with soap, weak detergent or warm water.

2. Use warm water and weak detergent to wash the trademarks on the surface of the stadium fence; use alcohol or organic solvents to scrub the binder components;

3. Grease, oil, lubricating oil pollution on the surface, after wiping it with a soft cloth, clean it with neutral detergent or ammonia solution or detergent;

4. If there are rainbow patterns on the surface, it is caused by excessive use of detergent or oil. It can be washed away with warm water neutral detergent when washing. The rust caused by dirt on the surface of stainless steel can be washed with 10% nitric acid or abrasive detergent. It can also be washed with special detergents.

Maintenance of the stadium fence:

1. Determine the area of the object to be polished and determine the agent used;

2. Wipe the surface of the object with a damp cloth dipped in pvc-coated chain link fence detergent, and wipe off the dirt or dust;

3. Apply appropriate paint to protect the appearance.

Road guardrail manufacturers are used in the production of this road guardrail. Zinc rod surface treatment using hot dip zinc process, zinc steel road guardrail is not easy to rust because the raw material has a strong corrosion resistance.

The appearance of the steel road guardrail will also use the color polymer simulation enamel electrophoresis high-temperature curing process, which is very high strength, more than 10 times that of ordinary guardrail. Under the surface protection of this strength, the capabilities of zinc-steel road guardrail have been improved to a certain extent. Zinc-steel road guardrail can withstand 50 kilograms of impact force per square centimeter, in the anti-oxidation,. Ability is very... Rain and fog weather is not easy to rust.

Galvanized iron pot boiling water is not toxic. Galvanized iron sheet is what we commonly call galvanized iron sheet, galvanized iron sheet is often made into a variety of buckets, basins and kettles.

Iron and zinc are both metallic elements, they do not dissolve in water, with galvanized iron pot boiling water is also drinkable. Zinc and iron are both essential trace elements for the human body, and even if there is a little in water, it is also beneficial to the human body.

However, galvanized sheet in the process of galvanizing, with chemical reactions, it is inevitable that a small amount of harmful substances will be mixed, long-term use of harmful substances will precipitate, and a long time may cause damage to the human body. It is recommended that consumers choose 304 or 316 food set stainless steel kettle for water.

Galvanized iron pot boiling water is not toxic. Galvanized iron kettle is made of sheet iron, even if heating will not change, and there is no harm to the human body, but long-term heating of the kettle inside will produce scale, so it should be dealt with in time.

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!

The following points should be paid attention to in the use of color coated rolls to prevent damage and reduce service life.

1. When loading and unloading, rubber pads should be added to the contact point between the crane and the color coating roll to prevent scratches and paint falling off.

2. If the color coating roll needs to be cut lengthwise, lay a rubber pad on the floor of the device that is in contact with the color coating plate. After cutting, the metal chips should be removed immediately to prevent scratching the coating on the surface of the color coated board.

3. Zinc can be used as a protective steel, as far as possible in the use of color coated plate incision secret location, there are strict engineering requirements to protect the incision.

4. After the installation of the project, check and remove the welding points and metal chips remaining on the color coating board during the construction, so as to avoid corrosion to the color coil. Color roll storage must be guaranteed in a dry, ventilated indoor environment, so as not to open storage in areas where condensation is easy and temperature changes. When pressing molding, it is necessary to cover the film must be covered, such as: PVDF coated color coated plate, aluminum plated zinc plate.

5. Color coated rolls should be stored in a clean and tidy environment to prevent the erosion of a variety of corrosive media. The floor of the storage place should be flat, not hard, and have sufficient carrying capacity.

6. Horizontal steel coil should be placed on rubber pad, pad wood, bracket and other devices, fasteners should not be upward, directly placed on the ground or transport vehicles.

7. In order to prevent crush injury, steel rolls are usually not overlapped. When the stacking steel plate is stored, the number of stacking layers is strictly limited, and the lower layer should be a bag with large weight and size.

8. When color coating rolls are used on the surface of a building, try to produce products at the same time on the same production line of the same manufacturer to avoid mixing and resulting in color difference, affecting the visual effect.

Steel is generally divided into four categories, profiles, plates, building materials, pipes. Among them, the materials of profiles and plates are mainly classified as Q235B, Q345B and Q355B, while the main material of building materials is HRB400E, and the material of pipes is also mainly Q235B. The types of profiles are H-shaped steel, I-beam steel, channel steel, Angle steel. Among them, the plates are medium and thick plates, pattern plates, pattern rolls and open plates.

Steel is generally divided into four categories, profiles, plates, building materials, pipes. Among them, the materials of profiles and plates are mainly classified as Q235B, Q345B and Q355B, while the main material of building materials is HRB400E, and the material of pipes is also mainly Q235B. The types of profiles are H-shaped steel, I-beam steel, channel steel, Angle steel. Among them, the plates are medium and thick plates, pattern plates, pattern rolls and open plates. The types of building materials are mainly seismic disk screw, three seismic rebar, four seismic rebar. The types of pipe mainly include black square pipe, black rectangular pipe, galvanized rectangular pipe, galvanized square pipe and so on.

1. steel high strength, plasticity, heat resistance, good toughness;

2. uniform steel material, high reliability;

3. the steel structure is simple to make, the construction period is short, with good assembly;

4. the steel has weldability;

5. the steel has no leakage, easy to make closed structure;

6. steel is closer to homogeneity and isotropy.

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.