Duplex Steel Coils

Duplex stainless steels typically have a higher content of chromium, nickel, and molybdenum compared to austenitic stainless steels. This combination of elements provides improved corrosion resistance, especially in harsh environments such as those containing chlorides.

Coils are continuous lengths of flat metal that are wound into a roll. Duplex steel coils are used in various applications where the corrosion resistance and mechanical strength of duplex stainless steel are advantageous.

Table of Content

• Duplex Coils Manufacturing Process
• Duplex Steel Coil Specifications
• Types Of Duplex Steel Coil
• Other Types Of Duplex Steel Coils
• Duplex Steel Coil Industrial Application
• Export & Supply Destination of Duplex Coil

Manufacturing Process Of Duplex Coils

Reheating Furnace

Reheating furnaces are used in hot rolling mills to heat the steel stock to the rolling temperatures.

Scale Breaker

Slab moves first through a scale breaker, which is a two-high rolling mill with vertical rolls that loosens the furnace scale and removes it with high-pressure water jets.

Finish Rolling

The last stage of the rolling process is cold rolling,

Cooling

Cooling or Quenching is a process of cooling a metal at a rapid rate.

Skin Pass Mill

This produces high-gloss surfaces and achieves the desired mechanical strip properties such as deep-drawing strength.

Marking & Packing

Proper packaging and labeling not only makes the final product look attractive but also save a huge amount of money by saving the product from wrong handling.

Specifications of Duplex Steel Coils

The specifications of duplex steel coils can vary depending on the specific grade of duplex stainless steel, the manufacturing standards, and the intended application. However, here are some general specifications commonly associated with duplex steel coils:

Material Grade: Duplex stainless steel grades include SAF 2205 (UNS S31803/S32205), SAF 2507 (UNS S32750), and others. The specific grade will depend on the application and performance requirements.

Chemical Composition: Duplex stainless steels typically have a two-phase microstructure consisting of austenitic and ferritic phases. The chemical composition includes elements such as chromium, nickel, molybdenum, nitrogen, and others. The composition varies among different grades.

Dimensions: Coil Width: Duplex steel coils are available in various widths to suit different manufacturing processes and end-use requirements. Coil Thickness: The thickness of the coils can vary, and it is an important parameter depending on the application.

Surface Finish: Duplex steel coils may come with different surface finishes, such as 2B (cold-rolled, annealed, and pickled), BA (bright annealed), or others. The choice of finish depends on the application and aesthetic requirements.

Standards and Specifications: Duplex steel coils are manufactured to comply with international standards such as ASTM/ASME, EN/DIN, ISO, or others. Specifications like ASTM A240/A240M or EN 10088 may be applicable.

Heat Treatment: Heat treatment processes, such as annealing or solution annealing, may be specified to achieve the desired mechanical properties and corrosion resistance.

Tolerance: Tolerance levels for dimensions and other properties are typically specified to ensure that the duplex steel coils meet the required standards and application specifications.

Testing and Inspection: Duplex steel coils are subject to various tests and inspections, including chemical analysis, mechanical testing, non-destructive testing (such as ultrasonic or eddy current testing), and visual inspection.

Why Choose Calico Metal Alloy Pvt Ltd?

Calico Metal Alloy Pvt Ltd is a premier choice for duplex steel coils in India. Renowned for our unwavering commitment to quality and customer satisfaction, we provide top-notch products from the finest duplex steel alloys. Our extensive inventory and state-of-the-art manufacturing processes ensure reliable and durable coils tailored to meet your specific needs. With a track record of excellence and reliability, we pride ourselves on delivering superior products that exceed industry standards. Choose Calico Metal Alloy Pvt Ltd for unparalleled expertise, exceptional service, and dependable solutions for all your duplex steel coil requirements in India.

Types Of Duplex Stainless Steel Coil

01

Duplex Steel Hot Rolled Coil

02

Duplex Steel Cold Rolled Coil

03

Duplex Steel Foils

04

Duplex Steel Plain Coil

05

Duplex Steel Shim Coil

06

Duplex Steel Slit Coil

Other Types Of Duplex Steel Coils

Equivalent Grades of Duplex Steel Coils

Equivalent grades of duplex steel coils typically refer to alternative specifications or standards that correspond to the same or similar chemical composition and mechanical properties. Duplex stainless steels are designated by various grades such as SAF 2205 (UNS S31803/S32205) and SAF 2507 (UNS S32750), among others. Equivalent grades may vary depending on the specific standard or specification being used. Here are some common equivalent grades for duplex steel coils:

ASTM/ASME: Duplex stainless steel grades are designated according to ASTM/ASME standards. For example: ASTM/ASME A240/A240M: This standard covers chromium, chromium-nickel, and chromium-manganese-nickel stainless steel plate, sheet, and strip for pressure vessels and general applications. Duplex stainless steel grades such as UNS S31803/S32205 and UNS S32750 are covered by this standard.

EN/DIN: European and German standards often use designations such as 1.4462 (X2CrNiMoN22-5-3) for duplex stainless steel. Equivalent grades under EN/DIN standards include:

• EN 1.4462: This is the European designation for duplex stainless steel, equivalent to UNS S31803/S32205.
• EN 1.4410: Another common grade, equivalent to UNS S32750.

Duplex Steel Coil Industrial Application

Electrical

Automotive

Construction

Defence

Pharmaceutical

Petroleum

Petrochemical

Milk & Dairy

Export & Supply Destinations Of Duplex Coils