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Product Information

321 and 321H stainless steel coils are stabilized grades of stainless steel that incorporate titanium. This addition enhances their resistance to inter-granular corrosion, making them particularly suited for applications where exposure to high temperatures and corrosive environments is a concern. These grades are known for their exceptional durability and resistance to oxidation, ensuring longevity and reliability in demanding conditions.

 

CaribeSteel is proud to have exported 321/321H stainless steel coils to over 80 countries around the world. This global presence reflects the high quality and consistent performance of their products, which are used in a variety of industries including aerospace, chemical processing, and power generation. The superior properties of 321/321H stainless steel make it a preferred choice for critical applications requiring both strength and resistance to corrosive elements.

Detail

Product Name

321/321H Stainless Steel Coil

Equivalent Grade

321: AISI 321, UNS S32100, SAE 321, DIN 1.4541, SUS 321, X6CrNiTi18-10

321H: AISI 321H, UNS S32109, SAE 321H, DIN 1.4940, SUS 321H, X8CrNiTi18-10

Standard

GB, AISI, ASTM, DIN, EN, JIS

Process

Hot Rolled, Cold Rolled

Sizes

Thickness: 0.1-16mm, Width: 600-2000mm

Surface Treatment

NO.1, 2B, NO.4, BA, HL, Mirror

Inspection

SGS, TUV, BV, ABS, LR etc.

Packing

Wooden Box, Wooden Pallet, Iron Frame

Application

Oil&Gas, Petroleum, Vessels, Ship Building, Water Treatment And Environmental Protection etc.

Specification

Coil Of Rolling Specification

Thickness/Width

900mm

1000mm

1219mm

1500mm

1800mm

2000mm

0.3-0.5mm

0.6-0.7mm

0.7-0.8mm

0.8-0.9mm

1-1.2mm

1.5-2mm

2.5-3mm

special

special

special

special

special

special

Processing Category

 

 

 

Hot Forming

 

The elevated sulfur content in the material negatively affects its hot work-ability, making it more challenging to form or shape under high temperatures. Sulfur, while beneficial for improving machinability, tends to reduce the material's ductility and can lead to cracking during hot forming processes. As a result, if hot forming is a necessary step in manufacturing, it is advisable to explore alternative materials that offer better performance under such conditions. Selecting a more suitable alloy can help avoid complications and ensure the integrity of the final product, especially in demanding applications where both strength and work-ability are critical.

 

 

 

Cold Forming

 

The material exhibits excellent ductility, allowing it to be easily shaped and formed into a wide variety of complex structures without cracking or losing its strength. Its ability to undergo significant deformation without fracturing makes it highly adaptable for both simple and intricate fabrication processes. This characteristic is especially valuable in applications that require bending, drawing, or stretching, as the material can maintain its integrity and durability throughout the forming process. Its ease of form-ability makes it a preferred choice in industries such as automotive, aerospace, and manufacturing, where versatile shaping is crucial.

 

 

 

Welding

 

 

The material is compatible with most standard welding processes, making it highly versatile and easy to work with during fabrication. Whether using common techniques like TIG (Tungsten Inert Gas), MIG (Metal Inert Gas), or stick welding, the material forms strong, reliable welds. Additionally, it does not require post-weld heat treatment, which simplifies the welding process and reduces production time and costs. This characteristic makes the material especially suitable for applications where efficient, high-quality welding is essential, such as in the construction, automotive, and marine industries. Its weld-ability, combined with minimal post-processing requirements, ensures both convenience and structural integrity in demanding environments.

Chemical Properties

 

C

Mn

P

S

Si

Cr

Ni

Mo

N

Cu

321

0.08

2.00

0.045

0.03

0.75

17.00-19.00

9.00-12.00

/

0.10

/

321H

0.10

2.00

0.045

0.03

0.75

17.00-19.00

9.00-12.00

/

0.10

/

Mechanical Properties

 

Tensile Strength (min)

Yield Strength (min)

Elongation

Hardness, max

 

ksi

Mpa

ksi

Mpa

/

Brinell.HBW

Rockwell

321

75

515

30

205

40

217

95HRBW

321H

75

515

30

205

40

217

95HRBW

Surface Detail

NO.1

The NO.1 surface is achieved through heat treatment and pickling after hot rolling. It has a silver-white, matte appearance with a subtle sheen. This surface finish is ideal for applications where heat and corrosion resistance are crucial, but surface brightness is not a priority. It is commonly used in industries such as industrial storage tanks, chemical processing plants, and other environments that demand durability and resistance to harsh conditions.

2D

The 2D surface finish is produced through heat treatment and pickling after cold rolling, resulting in a silver-white appearance with a smoother yet matte texture. This surface is widely used in applications that require both durability and a refined appearance. Common uses include petrochemical production equipment, automotive parts, building materials, and water pipes, where strength and corrosion resistance are essential, but a highly polished surface is not necessary.

 

2B

 

Following the 2D treatment, the material undergoes a final light cold rolling process using a polishing roller to achieve a subtle gloss. The resulting surface is smooth, bright, and can be easily re-polished to enhance its shine further. This finish is commonly used in applications such as building materials and tableware, where an aesthetically appealing and easy-to-maintain surface is important.

 

NO.4

 

The NO.4 finish is achieved by grinding with a belt of grit size 150-180, resulting in a surface with improved gloss, finer lines, and more refined stripes compared to the rougher NO.3 finish typically used for polished and sanded stainless steel surfaces. This finish is widely applied in industries such as food processing equipment, household appliances, and medical equipment, where a smooth, aesthetically pleasing surface with enhanced durability is required.

 

BA

 

The BA (Bright Annealed) surface is produced through cold rolling and de-scaling, resulting in an excellent surface gloss and high reflectivity. Its extremely smooth finish makes it ideal for additional finishing processes like mirror polishing and chrome plating. Due to its superior appearance and durability, the BA surface is commonly used in applications such as catering equipment, where both functionality and aesthetic appeal are important.

 

HL

 

The HL (Hairline) finish is achieved by grinding with a polishing abrasive belt of suitable grit size (150-320 mesh), resulting in distinct, straight stripes on the surface. This finish provides an attractive appearance with a good texture, where scratches are less visible. It is known for its durability and wear resistance. Common applications for the HL finish include building decoration, elevators, and vehicle parts, where a stylish and resilient surface is required.

 

Mirror

 

The Mirror finish is achieved by polishing with progressively finer abrasives and extensively buffing the surface until all scratches from initial grinding are eliminated. This process results in the highest level of reflectivity. It is primarily used for both interior and exterior decorative materials in automobiles and buildings, where a high-gloss, reflective surface is desired.

Get in Touch
321/321H Stainless Steel Coil
Get in Touch

Tel:+1-925-413-4562

E-mail:sales@caribesteel.com

Phone:+1-925-413-4562

Address:Zona franca multimodal Caucedo, mega Puerto Caucedo, punta Caucedo municipality of boca chica, in the provice of Santo Domingo, Dominican Republic