• Best Cold Rolled Steel Coil Q195~Q345 --Good Visual Effect System 1
  • Best Cold Rolled Steel Coil Q195~Q345 --Good Visual Effect System 2
  • Best Cold Rolled Steel Coil Q195~Q345 --Good Visual Effect System 3
  • Best Cold Rolled Steel Coil Q195~Q345 --Good Visual Effect System 4
Best Cold Rolled Steel Coil Q195~Q345 --Good Visual Effect

Best Cold Rolled Steel Coil Q195~Q345 --Good Visual Effect

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China main port
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TT OR LC
Min Order Qty:
50 m.t.
Supply Capability:
10000 m.t./month

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 Best Cold Rolled Steel Coil Q195~Q345 --Good Visual Effect

1.Structure of Best Cold Rolled Steel Coil Q195~Q345

The raw material of cold rolled steel coil/sheet is high quality hot rolled product, and after pickling continuous rolling, degreasing, annealing,skin pass,slitting and cut to length line etc. Along with it many kinds of new  technology and new process of global cold rolling production have been applied. Therefore the quality of the goods could be guaranteed. The product is widely used in outdoor and interior decoration, furnishing manufacturing, home appliance, automobile etc. 

2.Main Features of Best Cold Rolled Steel Coil Q195~Q345

• Excellent process capability

• Smooth and flat surface

• Workability, durability 

• Excellent heat resistance performance

 

3. Cold Rolled Steel Images

 

Best Cold Rolled Steel Coil Q195~Q345 --Good Visual Effect

Best Cold Rolled Steel Coil Q195~Q345 --Good Visual Effect

4.Cold Rolled Steel Specification

Standard:AISI,ASTM,DIN,GB,JIS,JIS G3302 ASTM 653M EN10142

Grade: Q195~Q345

Thickness: 0.16mm~2.0mm

Width: 1250mm MAX

Coil weight:3-12 MT

Coil ID:508/610mm

 

FAQ 

1.How to guarantee the quality of the products

We have established the international advanced quality management systemevery link from raw material to final product we have strict quality test.

 

2. How long can we receive the product after purchase?

Usually within thirty working days after receiving buyer’s advance payment or LC. We will arrange the factory manufacturing as soon as possible. The cargo readiness usually takes 15-25 days, but the shipment will depend on the vessel situation.

 

 

 

 

 

 

 

Q:What are the considerations for selecting monolithic refractories for ladles and tundishes?
Some considerations for selecting monolithic refractories for ladles and tundishes include the specific temperature requirements, chemical composition of the molten metal, thermal shock resistance, erosion and corrosion resistance, mechanical strength, ease of installation and maintenance, and cost-effectiveness.
Q:How do monolithic refractories improve the efficiency of ladle and tundish drying furnaces?
The efficiency of ladle and tundish drying furnaces is enhanced by monolithic refractories in multiple ways. To begin with, monolithic refractories provide a high level of thermal insulation. These refractories possess low thermal conductivity, effectively minimizing heat transfer from the furnace to the surrounding environment. This insulation property helps to reduce heat losses and maintain a higher temperature within the furnace for a longer duration. Consequently, the drying process becomes more efficient as the heat is retained within the furnace, resulting in a decrease in overall energy consumption. Furthermore, monolithic refractories exhibit exceptional resistance to thermal shock. The rapid temperature fluctuations that occur during the heating and cooling cycles of the furnace can cause stress and cracks in the refractory material. However, monolithic refractories are designed to withstand these thermal shocks and maintain their structural integrity. This durability ensures a longer lifespan for the refractory lining, reducing the need for frequent repairs or replacements. Consequently, the furnace operates at optimal efficiency without the downtime associated with maintenance. In addition, monolithic refractories offer excellent mechanical strength and abrasion resistance. These properties are crucial in ladle and tundish drying furnaces, which are subjected to mechanical stresses and abrasive substances like molten metal and slag. The use of monolithic refractories ensures that the lining can endure these harsh conditions without suffering structural damage. This resistance to wear and tear increases the overall efficiency of the furnace, enabling it to operate uninterrupted for longer periods. Lastly, monolithic refractories provide greater design flexibility compared to traditional brick or tile refractories. They can be easily cast or gunned onto the lining surface, simplifying installation and repair processes. This flexibility allows the furnace to be customized and adapted to meet specific requirements, ensuring optimal heat distribution and efficient drying processes. In conclusion, monolithic refractories enhance the efficiency of ladle and tundish drying furnaces through their thermal insulation, resistance to thermal shock, mechanical strength, and design flexibility. By reducing heat losses, increasing durability, withstanding harsh conditions, and facilitating easy installation and repair, these refractories optimize the performance and energy efficiency of the furnaces.
Q:What are monolithic refractories?
Monolithic refractories are a type of refractory material that is manufactured as a single, homogeneous unit, as opposed to being made from individual bricks or precast shapes. They are characterized by their ability to be shaped and installed in various applications without the need for joints or mortar, making them a versatile and convenient choice for lining furnaces, boilers, kilns, and other high-temperature industrial equipment. These refractories are typically composed of a mixture of refractory aggregates, binders, and additives, which are carefully selected and combined to provide the desired properties such as high temperature resistance, thermal shock resistance, and chemical durability. The aggregates used can include materials like alumina, magnesia, zirconia, and silica, while binders like clay, cement, or phosphate are added to hold the aggregates together. One of the advantages of monolithic refractories is their ability to adapt to complex shapes and designs, allowing for customized linings that can be tailored to specific equipment requirements. They are often applied by pouring, gunning, ramming, or spraying the refractory material onto the surface to be lined, allowing for quick and efficient installation. This eliminates the need for time-consuming bricklaying and jointing, reducing installation time and labor costs. Monolithic refractories are also known for their superior thermal conductivity, which enables them to withstand high temperatures and sudden temperature changes. They offer excellent insulation properties, preventing heat loss and improving energy efficiency in industrial processes. Furthermore, these refractories exhibit good resistance to chemical attack from molten metals, slags, gases, and other corrosive substances found in various industrial environments. This makes them highly suitable for applications in industries such as steel, cement, glass, petrochemical, and non-ferrous metals. In summary, monolithic refractories are a versatile and efficient solution for high-temperature applications. Their ability to be shaped and installed without joints or mortar, coupled with their excellent thermal conductivity and chemical resistance, make them a valuable choice for lining industrial equipment that operates under extreme conditions.
Q:What are the main factors affecting the thermal expansion of monolithic refractories?
The thermal expansion of monolithic refractories is influenced by various factors. These factors comprise the type of refractory material, the temperature range, the chemical composition, and the physical structure of the refractory. To begin with, the thermal expansion behavior of a refractory is significantly determined by its type of material. Different types of refractories, such as alumina-based, silica-based, and magnesia-based refractories, possess varying coefficients of thermal expansion (CTE). For instance, alumina-based refractories generally exhibit a lower CTE in comparison to silica-based refractories. Consequently, the choice of refractory material holds great influence over its thermal expansion characteristics. Secondly, the thermal expansion of a refractory is affected by the temperature range to which it is exposed. As the temperature rises, the refractory material expands due to the absorption of thermal energy. However, different refractories demonstrate different expansion behaviors depending on temperature. Some refractories may exhibit a linear or near-linear expansion with temperature, while others may display non-linear or step-wise expansion. Hence, the temperature range of operation is a critical factor in determining the suitability of a refractory for a specific application. The chemical composition of the refractory also has an impact on its thermal expansion. The presence of various chemical elements and compounds in the refractory material can influence its expansion behavior. For instance, the addition of specific oxides, like magnesia or zirconia, can modify the CTE of the refractory. Similarly, impurities or variations in the chemical composition can introduce discrepancies in expansion characteristics among refractories of the same type. Lastly, the physical structure of the refractory, encompassing factors such as porosity, density, and microstructure, can influence thermal expansion. The existence of open or closed pores within the refractory can affect its ability to expand uniformly under thermal stress. The density of the refractory also plays a role, as denser refractories tend to have lower thermal expansion. Moreover, the microstructure, including grain size and orientation, can impact the overall expansion behavior of the refractory. To conclude, the primary factors influencing the thermal expansion of monolithic refractories include the type of refractory material, temperature range, chemical composition, and physical structure. A comprehensive understanding of these factors is crucial in selecting the appropriate refractory for a specific application to ensure optimal performance and durability.
Q:What are the specific requirements of monolithic refractories for ladle transfer applications?
Monolithic refractories used in ladle transfer applications have specific requirements to ensure their effectiveness and durability. These requirements are essential for maintaining the integrity of the ladle lining and preventing any issues during the transfer process. Firstly, monolithic refractories for ladle transfer applications must have excellent thermal shock resistance. Ladles are subjected to extreme temperature changes during the transfer process, and the refractories must be able to withstand rapid heating and cooling without cracking or spalling. This property helps to prevent any damage to the lining and maintains the structural integrity of the ladle. Secondly, ladle transfer applications require monolithic refractories with high resistance to chemical attack. Ladles often come into contact with various molten metals and slag, which can have corrosive properties. The refractories must be able to withstand these corrosive environments and maintain their physical and chemical properties over time. Another important requirement is good mechanical strength. Ladles can experience significant mechanical stress during the transfer process, including impacts and vibrations. Therefore, the monolithic refractories need to have sufficient strength to resist these mechanical forces and prevent any cracking or failure in the lining. Furthermore, ladle transfer applications often involve the use of fluxes and additives, which can have different physical properties. The refractories used must have compatibility with these fluxes and additives to ensure proper performance and avoid any adverse reactions that could affect the ladle's lining. Lastly, monolithic refractories for ladle transfer applications should have low porosity. Low porosity helps to minimize the penetration of molten metal and slag into the refractory lining, reducing the risk of erosion and extending the service life of the refractories. In summary, the specific requirements of monolithic refractories for ladle transfer applications include excellent thermal shock resistance, high resistance to chemical attack, good mechanical strength, compatibility with fluxes and additives, and low porosity. By meeting these requirements, the refractories can effectively withstand the harsh conditions of ladle transfer and ensure the longevity and performance of the ladle lining.
Q:How do monolithic refractories withstand high temperatures in iron and steel production?
Monolithic refractories, which are tailored for iron and steel production, have the capability to endure the formidable temperatures involved. Unlike traditional brick refractories that are built brick by brick, monolithic refractories are made from a single piece or material. The resilience of monolithic refractories against high temperatures is due to their distinctive composition and structure. They are crafted from top-notch raw materials, such as alumina, magnesia, silica, and carbon, which possess high melting points and exceptional heat resistance. To shape and strengthen the monolithic refractory, it is commonly mixed with a binder like clay or cement. This binder assists in binding the refractory particles together and provides the necessary structure to withstand thermal stresses. Moreover, the mixture can include various additives to further enhance the refractory properties. Throughout the iron and steel production process, monolithic refractories encounter extreme temperatures, rapid heating and cooling cycles, and chemical reactions with molten metals and slag. Nevertheless, the unique composition and structure of monolithic refractories enable them to withstand these harsh conditions. The high melting point materials utilized in monolithic refractories prevent them from melting or deforming under the intense heat of iron and steel production. These materials exhibit excellent thermal conductivity, effectively transferring heat away from hot surfaces and preventing overheating and damage. Furthermore, the binders and additives in monolithic refractories enhance their resistance to thermal shock, which arises from sudden temperature changes. This resistance is vital in iron and steel production since the refractories are frequently exposed to extreme temperature differentials. Lastly, the monolithic nature of these refractories eliminates the presence of joints and gaps commonly found in traditional brick refractories. The absence of joints minimizes the risk of heat leakage and infiltration of molten metal or slag, ensuring a more efficient and durable lining. In conclusion, monolithic refractories are specifically engineered to endure the high temperatures involved in iron and steel production. Their composition, structure, and unique properties enable them to withstand extreme heat, rapid temperature changes, chemical reactions, and thermal stresses, making them essential components in the manufacturing of iron and steel.
Q:What are the common failure mechanisms of monolithic refractories?
Common failure mechanisms of monolithic refractories include thermal spalling, chemical attack, erosion, and mechanical stress. Thermal spalling occurs when the refractory material is exposed to rapid temperature changes, leading to the cracking and breaking of the refractory lining. This can happen due to thermal shock, such as when a cold material is suddenly exposed to high temperatures, or when the refractory is subjected to cyclic heating and cooling. Chemical attack occurs when the refractory material comes into contact with aggressive chemicals or gases that can react with and degrade the refractory lining. This can lead to the formation of new compounds or the dissolution of the refractory material, weakening its structure and reducing its resistance to further chemical attack. Erosion is another common failure mechanism, especially in applications where the refractory lining is exposed to high-velocity gas or liquid flows. The abrasive action of the flowing medium can gradually wear away the refractory material, leading to thinning and eventual failure of the lining. Mechanical stress, such as thermal expansion or contraction mismatch, can also cause failure in monolithic refractories. When the refractory material is subjected to rapid temperature changes, differential expansion or contraction can occur, leading to the development of cracks and fractures in the lining. To mitigate these failure mechanisms, various techniques can be employed, such as proper material selection based on the specific operating conditions, careful design to minimize thermal gradients, use of protective coatings, and regular inspection and maintenance to identify and address any signs of failure or degradation.
Q:How do monolithic refractories contribute to the overall safety of iron and steel operations?
Monolithic refractories play a crucial role in ensuring the overall safety of iron and steel operations by providing several important benefits. Firstly, monolithic refractories are known for their high thermal insulation properties, which means they can effectively withstand extreme temperatures and prevent heat loss. This is particularly important in iron and steel operations, where high temperatures are involved in various processes such as melting, casting, and heat treatment. By minimizing heat loss, monolithic refractories help in maintaining a stable temperature environment, reducing the risk of accidents and ensuring the safety of personnel. Secondly, monolithic refractories offer excellent resistance to chemical attacks. In iron and steel operations, various chemicals and gases are present that can corrode and deteriorate the lining of furnaces, ladles, and other equipment. By providing a protective barrier, monolithic refractories prevent the penetration of these corrosive substances, thus extending the lifespan of the equipment and reducing the likelihood of failures or leaks that could pose safety hazards. Additionally, monolithic refractories are known for their structural integrity and high mechanical strength. In iron and steel operations, heavy loads and stresses are common, especially during the handling and movement of molten metal and raw materials. Monolithic refractories can withstand these stresses without cracking or collapsing, ensuring the structural stability of the equipment and minimizing the risk of accidents or equipment failure. Furthermore, monolithic refractories offer excellent thermal shock resistance. During iron and steel operations, sudden temperature changes can occur due to the introduction of cold materials or liquids into hot equipment. This thermal shock can cause cracking and spalling of the refractory lining, which can compromise the safety and efficiency of the operation. Monolithic refractories, with their ability to withstand thermal shock, help in minimizing the risk of unexpected failures and maintaining the overall safety of the operation. In conclusion, monolithic refractories contribute significantly to the overall safety of iron and steel operations by providing high thermal insulation, chemical resistance, structural integrity, and thermal shock resistance. By ensuring a stable temperature environment, protecting against chemical attacks, withstanding heavy loads, and resisting thermal shock, monolithic refractories help in preventing accidents, equipment failures, and potential hazards, thus creating a safer working environment for personnel in the iron and steel industry.
Q:Can monolithic refractories be used in electric arc furnaces and induction furnaces?
Yes, monolithic refractories can be used in both electric arc furnaces and induction furnaces. Monolithic refractories are versatile and can withstand the high temperatures and thermal shocks generated in these types of furnaces. They are often preferred due to their ease of installation, improved energy efficiency, and suitability for various furnace lining applications.
Q:What are the main factors affecting the thermal conductivity of monolithic refractories?
The thermal conductivity of monolithic refractories is affected by various factors. These include the composition of the refractory material, the density of the material, the porosity of the material, and the presence of any additives or impurities. The composition of the refractory material plays a significant role in determining its thermal conductivity. Different types of refractory materials, such as alumina-based, silica-based, or magnesia-based, exhibit different thermal conductivities due to their distinct chemical compositions. Materials with higher alumina content generally display higher thermal conductivities compared to those with higher silica content. The density of the refractory material also impacts its thermal conductivity. Materials with higher densities generally exhibit higher thermal conductivities because the closely packed particles enable more efficient heat transfer. Conversely, materials with lower densities tend to have lower thermal conductivities as the presence of air pockets or voids hinders heat transfer. Another crucial factor is the porosity of the refractory material. Porosity refers to the presence of small pores or spaces within the material. Higher porosity leads to lower thermal conductivity as the air or gas trapped within the pores acts as an insulator, reducing the material's ability to conduct heat. Therefore, materials with lower porosity tend to have higher thermal conductivities. The presence of additives or impurities in the refractory material also affects its thermal conductivity. Certain additives or impurities, such as carbon or metallic oxides, can either enhance or inhibit heat transfer in the material. For example, the addition of carbon can increase thermal conductivity due to its high thermal conductivity, while the presence of metallic oxides may decrease thermal conductivity due to their lower thermal conductivities. In conclusion, the thermal conductivity of monolithic refractories is influenced by factors such as composition, density, porosity, and the presence of additives or impurities. Understanding and controlling these factors are crucial in designing and selecting refractory materials with optimal thermal conductivity for specific applications.

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