304 Stainless Steel coil/strip

Desciption

Stainless Steel coil/strip

Stainless steel coil is notable for its corrosion resistance, and it is widely used for food handling and cutlery among many other applications. Stainless steel does not readily corrode, rust or stain with water as ordinary steel does. However, it is not fully stain-proof in low-oxygen, or high-salinity environments. There are various grades and surface finishes of stainless steel to suit the environment the alloy must endure.Stainless steel coil is used where both the properties of steel and corrosion resistance are required. Its resistance to corrosion and staining, low maintenance, and familiar lustre make it an ideal material for many applications.

Commodity	stainless steel coil
Grade	201,202,304,304L 309S,310S,316L,316Ti,317l,321,347
Certification	SGS ,BV
Thickness	0.3mm-3.0mm(cold rolled ) , 3mm-120mmm(hot rolled )
Width	600mm-2000mm
Length	1000mm-12000mm or as you need
Surface	2B, BA, NO.1, NO.4,HL or as requested
Standard	JIS, AISI, ASTM, GB, DIN, etc
Delivery time	Within 10-15 days since get the deposit
Within 10-15 days since get the deposit	2 tons
Package	Standard sea-worthy packaging , or as buyers' requirement
Payment term	30% TT as deposit and the balance should be paid by L/C or against copy of B/L
Applications	Stainless Steel Cold Coil applies to construction field, ships building industry,
Advantages	Strong corrosion and decorative effect

Metal supplier，stockist and manufacturer
We offer an extensive product line including various alloys, stainless steel, aluminum and galvanized. Our galvanized product portfolio includes galvanized pipes, galvanized sheets, galvanized coils as well as PPGI coils and PPGL coils, etc. Our stainless steel and aluminum products are available in different grades and sizes to meet the needs of different industries. We also offer alloys in a variety of forms including plate, rod, tube and custom shapes.Our service team is the backbone of the customer relationship, ensuring every interaction with our company is seamless, informative and satisfying. With a customer-centric approach, our professionals provide end-to-end support, from handling queries to after-sales services, ensuring your complete satisfaction at every step.Our company's technical prowess is unparalleled. Our team of engineers and technicians bring years of experience and a passion for innovation to produce metal with precision and care. Their expertise ensures our products can withstand the rigorous demands of any application, delivering reliability and performance.

Surface Finish

Surface finish is a critical aspect of stainless steel, as it affects appearance, corrosion resistance, and cleanliness. Below is a terminology table for common terms used to describe the surface finishes for stainless steel:

Term / Finish	Description
No. 1	A hot-rolled, annealed, and descaled finish, typically rough and dull. It's commonly used for industrial applications where the finish isn't a primary concern.
No. 2D	A dull finish produced by cold rolling, annealing, and descaling. May be used for deep-drawn parts or those where a glossy finish isn't necessary.
No. 2B	A smooth, moderately reflective cold-rolled annealed and pickled or descaled finish. A standard finish for most stainless steel appliances and for sheet metalwork.
No. 3	An intermediate polished finish obtained with approximately 100-grit abrasive, typically used where a semipolished finish is required.
No. 4	A general-purpose polished finish, typically obtained with a 150-180 grit abrasive. Common in kitchen appliances and elevator panels.
No. 6	A soft satin finish having a lower reflectivity than No. 4. It is produced with a pattern of very fine polishing lines.
No. 7	A highly reflective finish that is obtained by polishing with successively finer abrasives and buffing extensively until all grit lines are removed.
No. 8	Known as a "mirror finish". Highly reflective, with very clear image capabilities, achieved by polishing with successively finer abrasives followed by extensive buffing.
Hairline	A finish that results in long lines that extend along the length of the coil giving it a patterned texture which resembles hair strands. It's created through a continuous linear polishing.
Brushed or Satin Finish	Obtained by mechanically polishing the metal with fine abrasives to create a brushed appearance. Less reflective than No. 4 finish.
Bead Blasted	A matte finish with a frosted appearance produced by propelling a stream of abrasive material against the steel surface.
BA (Bright Annealed)	A highly reflective finish obtained by annealing in a controlled atmosphere to prevent oxidation, resulting in a bright and smooth surface.
PVD Coating	Physical Vapor Deposition is a process to produce a metal vapor that can be deposited as a thin, highly adhered pure metal or alloy coating. It is used to enhance surface properties such as color, corrosion resistance, and wear resistance.

These finishes are used for various applications ranging from aesthetic considerations to functional purposes like enhanced corrosion resistance or reduced particle retention for better cleanability. Selection of the right finish will depend on the requirements of the application and the environment in which the stainless steel product will be used.

Advantages of Stainless Steel coil

Stainless steel coils offer a range of advantages that contribute to their widespread use in various industries. Here are some key advantages of stainless steel coils:

Corrosion Resistance:

One of the most significant advantages is the excellent corrosion resistance of stainless steel. It resists corrosion from a variety of substances, making it ideal for applications in aggressive environments, such as chemical processing and marine settings.
High Strength:

Stainless steel coils exhibit high strength and durability, providing structural integrity to a wide range of applications. This makes it a preferred material in construction, automotive, and industrial settings.
Aesthetic Appeal:

Stainless steel has a naturally attractive appearance, and it can be polished or treated to achieve various finishes, enhancing its aesthetic appeal. This makes it suitable for architectural and design-oriented applications.
Hygienic Properties:

Stainless steel is easy to clean and maintain, making it a hygienic choice for applications in the food, pharmaceutical, and healthcare industries. Its smooth surface inhibits the growth of bacteria and other microorganisms.
Temperature Resistance:

Certain grades of stainless steel, such as 304 and 316, exhibit excellent resistance to high temperatures, making them suitable for applications in heat-intensive industries like automotive and aerospace.
Versatility and Formability:

Stainless steel can be easily formed into various shapes and sizes, providing versatility in manufacturing. This adaptability is valuable in industries where complex components are required.
Low Maintenance:

Stainless steel requires minimal maintenance over its lifespan. Its resistance to corrosion, staining, and rusting reduces the need for frequent cleaning or protective coatings.
Longevity and Durability:

Stainless steel is known for its durability and longevity. It can withstand harsh environmental conditions, ensuring a prolonged service life for products made from stainless steel coils.
Recyclability:

Stainless steel is highly recyclable, and the recycling process retains its valuable properties. This makes it an environmentally friendly choice, aligning with sustainability goals.
Wide Range of Grades:

There is a wide range of stainless steel grades, each tailored to specific applications. This allows for the selection of the most suitable grade based on factors like corrosion resistance, strength, and temperature requirements.
Resistance to Chemicals:

Stainless steel exhibits resistance to a wide range of chemicals, acids, and alkalis, making it suitable for use in chemical processing, petrochemical, and pharmaceutical industries.
Non-reactive Nature:

Stainless steel is non-reactive with food and beverages, making it a common choice for kitchen appliances, cookware, and food processing equipment.

These advantages collectively make stainless steel coils a versatile and reliable material in industries ranging from construction and manufacturing to healthcare and beyond.

Our advantage

Quality Assurance: We take pride in our rigorous testing and quality control measures that ensure only the best materials reach our clients.
Advanced Technology: Our facilities are equipped with state-of-the-art technology for both standard and custom metal production.
Vast Inventory: We boast a comprehensive inventory that enables us to fulfill orders rapidly and efficiently.
Custom Fabrication: Our team of experts works closely with clients to provide bespoke solutions tailored to their specific needs.

304 Stainless Steel coil Chemical Composition

The chemical composition of 304 stainless steel, also known as 18-8 stainless steel, is crucial in defining its properties and applications. Here is the typical chemical composition of 304 stainless steel:

Elemental Composition:
- Chromium (Cr): 18.0 - 20.0%
- Nickel (Ni): 8.0 - 10.5%
- Carbon (C): 0.08% max
- Manganese (Mn): 2.0% max
- Phosphorus (P): 0.045% max
- Sulfur (S): 0.030% max
- Silicon (Si): 0.75% max
Iron (Fe): The balance

Common forms of Stainless Steel coil

Stainless steel coils are manufactured in various forms to cater to different applications and processing requirements. Here are some common forms of stainless steel coils:
1. Hot Rolled Coils:
  
  Produced at high temperatures, these coils have a scaled surface and are commonly used as a starting material for further processing.
2. Cold Rolled Coils:
  
  Cold-rolled stainless steel coils undergo additional processing after hot rolling to improve surface finish, dimensional accuracy, and mechanical properties.
3. Bright Annealed Coils:
  
  Subjected to an annealing process in a controlled atmosphere, bright annealed coils have a smooth and reflective surface finish, making them suitable for applications requiring an aesthetically pleasing appearance.
4. Polished Coils:
  
  Stainless steel coils can be polished to achieve a high-gloss finish, enhancing their appearance. Polished coils are often used in decorative applications and architectural elements.
5. Slit Coils:
  
  Coils can be slit into narrower strips using slitting machines, providing more flexibility in terms of width and facilitating specific manufacturing requirements.
6. Cut-to-Length Coils:
  
  These coils undergo a cutting process to achieve specific lengths, simplifying further processing and reducing material waste.
7. Embossed Coils:
  
  Stainless steel coils can be embossed with patterns or textures for decorative or functional purposes. This is common in applications where aesthetics are important.
8. Precision Strip Coils:
  
  Precision strip coils are manufactured with tight tolerances, making them suitable for applications that require precise dimensions and consistent mechanical properties.
9. Coils with Protective Coatings:
  
  Some stainless steel coils may have protective coatings, such as PVC or PE films, to safeguard the surface during transportation, storage, and further processing.
10. Colored Coils:
  
  Stainless steel can be treated to achieve various colors through processes like physical vapor deposition (PVD) or electroplating, expanding its use in architectural and design applications.
11. Brushed or Satin Finish Coils:
  
  Coils can undergo brushing processes to create a brushed or satin finish, providing a textured appearance that is often used in decorative applications.
These various forms of stainless steel coils cater to diverse industry requirements, offering flexibility and customization in terms of appearance, dimensions, and mechanical properties. The choice of the specific form depends on the intended application and the desired characteristics of the final product.

Applications:

Kitchen Appliances:
304 stainless steel is widely used in the production of kitchen appliances, including sinks, refrigerators, and cooking utensils, due to its corrosion resistance and ease of cleaning.
Food Processing Equipment:
In the food industry, 304 stainless steel is employed in the manufacturing of equipment such as tanks, pipes, and conveyor belts, where hygiene and corrosion resistance are crucial.
Architectural Components:
Architectural features such as handrails, balustrades, and decorative elements often utilize 304 stainless steel for its aesthetic appeal, durability, and corrosion resistance.
Medical Equipment:
The medical and healthcare industries use 304 stainless steel in the production of surgical instruments, dental equipment, and medical devices due to its biocompatibility and corrosion resistance.
Automotive Trim and Exhaust Systems:
304 stainless steel is employed in automotive applications, particularly for trim and exhaust systems, where corrosion resistance and durability are essential.
Chemical and Petrochemical Processing:
The excellent corrosion resistance of 304 stainless steel makes it suitable for use in chemical and petrochemical processing equipment, such as tanks, pipes, and valves.
Textile Industry:
In the textile industry, 304 stainless steel is utilized for its corrosion resistance in applications like dyeing equipment and textile processing machinery.
Construction:
304 stainless steel is commonly used in construction for structural components, roofing, and cladding, where a combination of strength and corrosion resistance is required.
Industrial Equipment:
Various industrial equipment, including storage tanks, heat exchangers, and process piping, often incorporates 304 stainless steel due to its corrosion resistance in harsh environments.

Stainless Steel coil production process
1. Melting of Raw Materials:
  - The process begins with the melting of raw materials, typically iron ore, chromium, nickel, and other alloying elements, in an electric arc furnace or an induction furnace.
  - The molten metal is then refined to achieve the desired chemical composition.
2. Casting:
  - The molten metal is cast into semi-finished forms, such as billets or slabs, through continuous casting or ingot casting methods.
3. Hot Rolling:
  - The semi-finished forms are hot-rolled into coils at high temperatures.
  - Hot rolling reduces the thickness of the material and improves its mechanical properties.
4. Cold Rolling:
  - The hot-rolled coils undergo cold rolling, a process that further reduces thickness and enhances surface finish.
  - Cold rolling also imparts desired mechanical properties and dimensional accuracy to the stainless steel.
5. Annealing:
  - The cold-rolled coils are annealed, which involves heating the material to high temperatures and then slowly cooling it. Annealing relieves stress, improves mechanical properties, and enhances corrosion resistance.
6. Pickling and Passivation:
  - The stainless steel coils go through a pickling process to remove oxides, scales, and other impurities from the surface.
  - Passivation, which follows pickling, involves the application of a protective layer to enhance corrosion resistance.
7. Cut-to-Length or Slitting:
  - The coils are then processed through cut-to-length or slitting machines to achieve the desired dimensions.
  - Cut-to-length produces coils of specific lengths, while slitting creates narrower coils from wider ones.
8. Coiling:
  - The final step involves coiling the stainless steel strips into coils of various sizes, which are then packaged and prepared for distribution or further processing.
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packing and shipping
We use standard export shipping packaging and bundle the steel strips according to the size of the stainless steel coils. According to our shipping experience, a 20-foot container can hold 22 tons of stainless steel, and a 40-foot container can hold 25 tons of stainless steel. For larger orders, we use bulk carriers to transport them for you at a cheaper price. In addition, we can customize packaging according to customer needs.