What Is Cold Rolled Stainless Steel Sheet
Cold rolled stainless steel sheet plate is a metal plate with corrosion resistance, usually composed of iron, chromium, nickel and other alloy elements. It has the advantages of corrosion resistance, high temperature resistance, wear resistance, and easy cleaning, and is widely used in construction, engineering, manufacturing, chemical industry, food processing and other fields.
Advantages of Cold Rolled Stainless Steel Sheet
Durability
Cold rolled stainless steel sheet is a highly durable and long-lasting material, as it is resistant to wear and tear corrosion, and staining.
Hygienic
Cold rolled stainless steel sheet is easy to clean and does not harbour bacteria or other contaminants, making it a hygienic material for food preparation and storage.
Low maintenance
Cold rolled stainless steel sheet does not require frequent cleaning or polishing, which makes it a low-maintenance material.
Versatility
Cold rolled stainless steel sheet can be used in a variety of applications, from kitchenware to industrial equipment.
Cost-effective
Cold rolled stainless steel sheet is an economical material, as it is less expensive than many other metals.
Recyclable
Cold rolled stainless steel sheet is 100% recyclable, making it an environmentally friendly material.
Why Choose Us
Firm
The company began to engage in stainless steel business in 1998 and has now become one of the leading enterprises in china's steel industry. The plant is 20,000 square meters +
Experienced
Committed to strict quality control and attentive customer service, our experienced staff is always ready to discuss your requirements and ensure complete customer satisfaction.
24 hours online
If you have difficulties using the product, we will respond to your needs as soon as possible and give you the greatest support
Production market
Our main markets: South Korea, Vietnam, Chile, Brazil, Italy, Indonesia, Turkey, Russia, etc. , so our customers are all over the world.
The Strength-to-Weight Ratio of Aluminum Plate and Stainless Steel Plate Is Different
Degree to weight ratio. The strength of the aluminum plate is usually not as good as that of the cold rolled stainless steel sheet, and it is only about one-third of the cold rolled stainless steel sheet under the same conditions. This is also the main reason why aircraft are dominated by aluminum sheets.
Corrosion performance is different. Cold rolled stainless steel sheet is composed of iron, chromium, nickel, manganese, copper, and other elements. Adding chromium elements can provide good corrosion resistance. Also, since it is non-porous, the corrosion resistance of the stainless steel material is improved.
Aluminum sheets have high oxidation and corrosion resistance, mainly because of their passivation layer. After the aluminum plate is oxidized, its surface will also turn white. But in some extremely acidic or alkaline environments, aluminum can corrode rapidly, with catastrophic consequences.
In terms of thermal conductivity, the thermal conductivity (thermal conductor) of aluminum plates is better than that of cold rolled stainless steel sheets. This is also one of the main reasons why aluminum panels are often used in automotive radiators and air conditioning units.
In terms of cost, the aluminum plate is usually cheaper than the cold rolled stainless steel sheet.
In terms of usability, there are also differences between aluminum plates and cold rolled stainless steel sheets. The aluminum sheet is quite soft and easy to cut and shape. And because of its high wear resistance, stainless steel can be difficult to use, and stainless steel is also harder than aluminum, making it more difficult to form.
In terms of weldability, cold rolled stainless steel sheets are relatively easy to weld, while aluminum welding is more difficult.
In terms of heat resistance, the maximum operating temperature of stainless steel sheets is much higher than that of aluminum sheets. Usually, aluminum sheets become very soft when they are above about 400°c.
Electrical conductivity. Compared with most metals, the electrical conductivity of cold rolled stainless steel sheets is very poor. And the aluminum plate is a very good power material. High-voltage overhead power lines are usually made of aluminum because of their high electrical conductivity, lightweight, and corrosion resistance.
In terms of strength, if the weight factor is not considered, the cold rolled stainless steel sheet is stronger than the aluminum plate.
Types of Cold Rolled Stainless Steel Sheet
Austenitic stainless steel plates
Including common 304 stainless steel plates, 316 stainless steel plates, etc., which have good corrosion resistance.
Ferritic stainless steel plates
Including 430 stainless steel plates, etc., which are magnetic and have applications in some specific occasions.
Stainless steel plate surface polishing
Polishing stainless steel plates through mechanical or chemical methods can make the surface as smooth as a mirror. Polishing is divided into different levels, such as 6k, 8k, etc. Among them, 8k polishing can achieve a high degree of mirror effect, and the surface roughness can reach ra0.01 micron or less.
Stainless steel plate surface brushing
Through mechanical friction, straight lines are processed on the surface of the stainless steel plate. There are a variety of roughness options. According to different decorative effect requirements, you can choose thick or fine brushing.
Stainless steel sheet
Usually less than 3mm thick, suitable for lightweight structures and decoration.
Stainless steel middle plate
The thickness is between 3mm and 6mm, suitable for some occasions requiring medium strength.
Stainless steel thick plate
Thickness greater than 6mm, suitable for engineering projects requiring higher strength and durability.
Stainless steel hot-rolled plate
Made through the hot-rolling process, the surface may have oxide scale and require further processing.
Application of Cold Rolled Stainless Steel Sheet
Kitchen appliances
Cold rolled stainless steel sheets are used to make kitchen appliances such as ovens, stoves, and dishwashers.
Food and beverage manufacturing
Cold rolled stainless steel sheets are used to create storage tanks, containers, trays, and other food and beverage processing equipment.
Automotive
Cold rolled stainless steel sheets can be used to make car parts, such as exhaust systems and exhaust manifolds.
Construction
Cold rolled stainless steel sheets can be used to construct buildings and other structures.
Medical
Cold rolled stainless steel sheets are used to make medical instruments, such as surgical tools and implants.
Marine
Cold rolled stainless steel sheets are used to make components for ships and other vessels.
Chemical processing
Cold rolled stainless steel sheets are used in the production of chemicals, such as fertilizers and pharmaceuticals.
Heat exchangers
Cold rolled stainless steel sheets are used to construct heat exchangers, which are used in various industries to transfer heat from one medium to another.
Stainless steel is made by measuring the required amounts of each element such as: iron, chromium, and nickel. These metals and coke are added to a furnace (usually electric), which heats them to their melting point in a process that can take 12 hours. Once melted, the carbon must be removed using either a vacuum or oxygen decarburization (VOD). The amount of carbon removed will affect the hardness and tensile strength of the material. Before cooling, the steel will be stirred to ensure that the elements are uniformly mixed. As the metal is cooled into billets, it may be hot rolled while still above its crystallization temperature to form the steel into shape. If precise dimensions are required, the steel may be cooled and rolled below its crystallization temperature. Once cooled, the steel may be heat treated to relieve its internal stresses. Finally, the stainless steel will be cut to its final shape and surface-finished which will depend on the application of the steel but may include grinding.
How to Maintain Cold Rolled Stainless Steel Sheet
If Cold rolled stainless steel sheet has something like spalls, cement, oil, lime, putty, sand and other products attached to the surface, it should be cleaned up in time; otherwise it will produce rust or mildew after some time.
Water quality varies with areas and even the transportation mediums. For instance, the water transported through the galvanized pipe is likely to contain iron which, if left on the stainless steel surface without cleaning, will produce the floating rust easily.
The mineral materials, acid, or alkaline dusts in the newly decorated house, if falling on the surface of the Cold rolled stainless steel sheet without timely cleanup, will produce floating rust easily.
Stainless steel surface, if exposed to pig iron or the like for a long time, will also incur floating rust, mildew or discoloration.
If chemical agents, cleaning agents, paints, sauces, oil, pesticides or other chemicals are left on the surface for a long time, the stainless steel products will get mildew or rust.
When it comes to processing and installing stainless steel products, residuals or water stains left on the surface of the Cold rolled stainless steel sheet should be cleaned by cotton cloth dipped in the clean water after installing and use.
Please do not use wire ball or hard material to brush the stainless steel surface when in use or in maintenance. If external erosion causes floating rusts or yellow spots on the surface, it is advisable to use wet cotton dipped with old toothpaste to clean it up. Following that, use cotton dipped with transformer oil or sewing machine oil applying to the stainless steel surface so as to recreate a protection layer against secondary erosion.
Preparing materials
The process of manufacturing cold rolled stainless steel sheet begins with gathering the right type of alloys to be used as the primary materials. Typically, this includes iron as the base metal, along with a fair portion of chromium, nickel, and molybdenum. These raw materials undergo rigorous quality checks to ensure that they meet the standards for the required chemical composition of grade 316.
Melting the alloy
The alloy mixture is then smelted. During this process, the raw materials are heated to extremely high temperatures in a furnace or electric arc furnace, which can reach temperatures of up to 3000 degrees fahrenheit. This high temperature converts the solid metal into a molten state, ensuring that the elemental mixture is fully combined.
Casting process
Once a homogenous metal is obtained, it is poured into a mold to form an "ingot," the basic shape of the metal. This is usually done in a controlled environment to avoid impurities or changes in the metal's composition. The ingot is cooled and solidified, ready for the next step in manufacturing the cold rolled stainless steel sheet.
Annealing
To relieve the stress caused by the rolling process and soften the steel for further processing, the metal is then annealed. During this process, the cold rolled stainless steel sheet is heated to a specific temperature and then slowly cooled. Annealing reduces hardness and increases ductility, helping to prevent cracking during subsequent manufacturing steps.
Pickling
Pickling is done to remove any high-temperature scale or treatment results that may have occurred during the annealing process. Pickling is done by immersion in a passivating acid solution. This step also helps to further clean and prepare the metal for the next stage of the production process.
Passivation
After pickling, the plate is passivated to remove any remaining free iron and other contaminants. This ensures that the stainless steel 316 plate has the best corrosion resistance. Passivation can be achieved by immersion in a nitric acid solution, electrochemical treatment, or citric acid method, depending on the facility's preference and environmental regulations.
Electropolishing
If an ultra-smooth, nearly mirror-like finish is required, electropolishing can be employed. This process uses a combination of electricity and electrolytes to remove a thin layer of metal, resulting in a surface that is not only beautifully polished, but also extremely clean on a microscopic level, enhancing the properties of the stainless steel.
Visual inspection
Each plate is visually inspected to assess its surface quality and ensure that it does not have any defects that could affect its performance or aesthetics.
Dimensional inspection
The plate is measured to verify that it meets the thickness, length, and width detailed in the production plan.
Mechanical testing
Mechanical tests such as tensile strength, yield strength, and elongation are performed to verify the mechanical properties of the material and confirm that it meets the required standards forcold rolled stainless steel sheet.
Chemical analysis
A complete chemical analysis is performed to ensure that the stainless steel plate has the correct chromium, nickel, and molybdenum composition, which is critical to its corrosion resistance and other desired properties.
How to Choose a Cold Rolled Stainless Steel Sheet
Material
The material of stainless steel plate is one of the key factors affecting its quality. Common stainless steel materials include 304, 316, etc. Among them, 304 stainless steel has better corrosion resistance and processing performance, while 316 stainless steel has better high-temperature resistance and corrosion resistance. The appropriate stainless steel material can be selected according to actual needs and use environment.
Surface quality
The surface quality of the stainless steel plate is also one of the factors that need to be considered. The surface of a high-quality stainless steel plate should be smooth and flat, without obvious scratches, dents, rust, and other defects.
Thickness
The thickness of a stainless steel plate is also one of the important factors affecting its quality. Generally speaking, the thicker the thickness, the higher the strength and the better the corrosion resistance. However, steel plates that are too thick will increase costs, so the appropriate thickness needs to be selected based on actual needs.
Brand reputation
Choosing a stainless steel plate manufacturer with a brand reputation can ensure product quality and after-sales service. You can learn about the reputation of the manufacturer by checking the manufacturer's qualifications, user reviews, etc.
Price
Price is also one of the factors that need to be considered. Generally speaking, the price of high-quality stainless steel plates will be relatively high, but a price that is too low may mean that there are problems with product quality, so it is necessary to choose a suitable price range based on actual needs and budget.
AVIC International Mineral Resources Co., Ltd is a state-owned key Company held by AVIC Group (Aviation Industry Corporation of China, which is one of the World Top 500 Enterprise (number 144 in 2022). We are engaged in stainless steel business in 1998, and now we become one of the leading steel industry in China. our company is located in Hangzhou city which held the G20 Summit in 2016 year ,it is the capital of Zhejiang Province and famous for West Lake.