Daxun's full range of stainless steel coil products - the epitome of reliability, durability and high performance. We are proud to offer a wide selection of grades and types to meet the diverse needs of industrial and construction applications. From specialized categories such as austenitic series to ferritic series, our stainless steel coil products are known for their superior performance and diverse specifications. The austenitic series includes 201/304/304L/304J1, 321, 316/316L/317L/316Ti, which meet different thickness requirements and provides various surface treatments such as 2B, BA, NO.4, 8K, SB, and HL.

For customers looking for unique properties and applications, our ferrite series includes 430, ultra-pure ferrite 443 and 436L/439/444/441. Duplex steels include S31808/S32205/S32750/S32760. These products meet thickness requirements from 0.4mm to 3.0mm and are available in a variety of surface finish options, including 2B, BA, NO.4, 8K, SB, HL, and more.

We're a manufacturer. We have various processing options for our stainless steel coils, finish processing like BA finish plus PVC/PE, 2B finish plus PVC/PE, No.4 finish plus PVC/PE as per your demand.For your reference, all of our complete stainless steel coils can be divided into smaller ones with specified weight. Normally, our SS coil ID range is 150mm-510mm and SS coil OD range is 300mm-1200mm.
 

What are the applications that 304 stainless steel coils can be used?

304 stainless steel coils can be used for a variety of applications, including:

• 1. Food and beverage processing.
  304 stainless steel coils are used in the food sector to construct equipment such as water heaters, boilers and tanks.2. Healthcare Equipment
• 2.Hospitals employ 304 stainless steel coils to manufacture a wide range of medical equipment, such as operating tables, bedpans, and baby incubators.
• 3. Industrial Machinery
  Industrial machinery manufacturers use 304 stainless steel coils for items like valves and pumps in their products.
• 4. Construction Equipment
  Building contractors utilize 304 stainless steel coils to create weatherproofing materials that protect structures from rain and snow while they are being built or renovated.

Features of 304 stainless steel coils

304 stainless steel coils have the following features:

• 1. 304 stainless steel coils have high strength, hardness, wear resistance, corrosion resistance, and thermal conductivity.
• 2. 304 stainless steel coils have great temperature resistance (up to 870 degrees).
• 3. 304 stainless steel coils have good anti-oxidation properties and may be used in a variety of applications;
• 4. 304 stainless steel coils are widely utilized in a variety of industries, including food, chemical industry, and metallurgy.
• 5. Although 304 stainless steel coils are less expensive than other grades, their price will climb swiftly as demand develops.

PROCESSING:

Types 304 and 304L cannot be hardened by thermal treatment. Annealing: Heat to 1850o F to 2050 o F and cool at sufficiently high rates through 1500oF to 800oF to avoid precipitation of chromium carbides. Stress Relief Annealing: Cold worked parts should be stress relieved at 750oF for ½ to 2 hours.

FORMING:

Annealed Types 304 and 304L can be fabricated by roll forming, deep drawing, bending and most other fabrication techniques. Due to the high work hardening rate of these materials, intermediate anneals maybe required to successfully fabricate the part.

WELDING:

Types 304 and 304L are weldable by most fusion or resistance welding techniques. If filler metal is required, Type 308 is normally used. Type 304L should be used in heavier sections to reduce the occurrence of carbide precipitation in the heat affected region adjacent to the weld pool

CORROSION:

Types 304 and 304L provides corrosion resistance in a wide range of moderately oxidizing and reducing conditions, fresh water and non-marine applications.

What are the commonly used surfaces of stainless steel coils?

The surface finish of 201 stainless steel coil might vary depending on the cold rolling processing methods used and the surface treatment used after rolling. Surface treatments for stainless steel coils include NO.1, 2B, 4, HL, 6, 8, BA, TR hard, heavy rolling bright 2H, polished bright, and other surface treatments:

• NO.1: The surface obtained after hot rolling, heat treatment and pickling of stainless steel strip. It is used to remove the black oxide scale formed by pickling or similar processes during hot rolling and heat treatment. It ranks first in surface treatment. The No. 1 surface is silvery white and matte. It is generally used in heat-resistant and corrosion-resistant industries that do not require high surface gloss, such as the alcohol industry, chemical industry, large containers, etc.
• 2B: Unlike the 2D surface, the 2B surface is smoothed by a light roller, and the surface is brighter. The surface roughness Ra value measured by the equipment ranges from 0.1 to 0.5μm, which is a typical value for most processing types. This stainless steel strip surface has the strongest adaptability and is suitable for industries such as chemical, papermaking, petroleum, medical, and a wide range of fields such as building curtain walls.
• TR hard surface: TR stainless steel is also called hard steel. Its characteristic steel grades include 304 and 301, which are used for items that require high strength and hardness, such as railway vehicles, conveyor belts, springs and washers. The idea is to use the work hardening characteristics of austenitic stainless steel to improve the strength and hardness of steel plates through cold working methods such as rolling. In order to replace the gentle flatness of the 2B base surface, the hard material is gently rolled by a few percent to tens of percent, and no annealing is performed after rolling. Therefore, the TR hard surface of the hard material is the rolled surface after the cold rolling process.
• Re-rolled bright 2H: After the rolling operation, the stainless steel strip will be bright annealed. A continuous annealing line can be used to quickly cool the strip. The stainless steel strip travels along the line at a speed of 60-80m/min. After this process, the surface finish will be 2H re-rolled bright.
• No. 4: The No. 4 surface has a good polishing effect and is brighter than No. 3. It can also be obtained by polishing the cold-rolled stainless steel plate with a 2D or 2B surface, and then polishing the processed surface with a sanding belt with a particle size of 150-180#. The tool measures the surface roughness (Ra) between 0.2 and 1.5μm. The No. 4 surface is widely used in restaurants and cooking equipment, medical equipment, architectural decoration, containers and other applications.
• HL: The HL surface is often called a hairline finish. The Japanese JIS standard specifies a continuous hairline abrasive surface obtained by polishing with a 150-240# abrasive belt. The restrictions under the Chinese GB3280 standard are unclear. HL surface finish is commonly used for architectural decoration, such as elevators, escalators, and exterior walls.
• No. 6: The No. 6 surface is further polished on the basis of No. 4 with a Tampico brush or a W63 grit abrasive material specified in the GB2477 standard. The surface has good metallic luster, softness, weak reflection, and no imaging. Due to its good performance, it is very suitable for curtain walls, tassel decoration, and cooking supplies.
• BA: BA is a surface that is brightly heat treated after cold rolling. Bright heat treatment is annealing in a protective atmosphere to ensure that the surface is not oxidized and retain the gloss of the cold-rolled surface, and then it is polished with a high-precision smooth roller to improve the surface brightness. The instrument evaluates the surface roughness to be 0.05-0.1μm, indicating that the surface is close to a mirror surface. BA surfaces can be used in a variety of applications, including food utensils, household appliances, medical equipment, automotive parts, and decorations.
• No. 8: Mirror surface, maximum reflectivity, no abrasive particles. The stainless steel deep processing industry also refers to 8K board. BA material is often used as raw material for mirror processing. It only needs to be polished. The surface is beautiful after mirror processing and is often used in building entrances and interior decoration.

What is the standard sea packaging  stainless steel coil?

• Standard export sea packaging:
  Waterproof Paper Winding+PVC Film+Strap Banding+Wooden Pallet or Wooden Case;
• Customized packaging as your request (Logo or other contents accepted to be printed on the packaging);
• Other special packaging will be designed as customer's request;
  Eye to wall and eye to sky are both available;
• By International Express: DHL/UPS/FEDEX/EMS and our own express line;
• By air, sea or land;
• Shipping Port: Shanghai, Ningbo, Qingdao, Tianjin or as your request.