304 Quality Stainless Steel Coils /Strips

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.

A 304 stainless steel coil is a continuous, flat-rolled metal strip that is wound into a coil form, derived from stainless steel sheets or plates through a rolling process. The "304" refers to the specific grade of stainless steel, which is one of the most common and widely used stainless steel grades.

Composition Ranges for 304 grade stainless steel coil&strip

 Mechanical properties of 304 grade stainless steel coil&strip

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:

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.

Hot Rolling&Cold Rolling

Cold rolling and hot rolling are two distinct processes used in the production of stainless steel plates, including those made from 304 stainless steel. Each process has its advantages and results in plates with different properties. Here's an overview of the cold rolling and hot rolling processes for 304 stainless steel plates:

Hot Rolling:

1. Process:

   • Hot rolling involves heating the stainless steel billet or slab to high temperatures (typically above 1700°F or 925°C).
   • The heated material is then passed through rollers to reduce its thickness and shape it into the desired form.
   • The process is characterized by high temperatures and rapid cooling.

2. Advantages:

   • Formability: Hot rolling enhances the formability of the stainless steel, making it easier to shape into various configurations.
   • Improved Surface Finish: The hot-rolled surface may have a scale (oxidized layer), which can be removed by pickling or other processes to achieve a smoother finish.

3. Properties:

   • Grain Structure: Hot rolling typically results in a larger grain structure compared to cold rolling.
   • Mechanical Properties: Hot-rolled plates tend to have lower mechanical strength and hardness compared to cold-rolled plates.

4. Applications:

   • Hot-rolled 304 stainless steel plates are commonly used in applications where formability and a rougher surface finish are acceptable, such as structural components.

Cold Rolling:

1. Process:

   • Cold rolling involves passing the stainless steel through rollers at room temperature or slightly below.
   • The process gradually reduces the thickness of the material and imparts a high degree of dimensional accuracy.
   • Cold rolling can be followed by annealing to enhance properties.

2. Advantages:

   • Improved Mechanical Properties: Cold rolling generally results in plates with higher mechanical strength, hardness, and a finer grain structure.
   • Surface Finish: Cold-rolled plates typically have a smoother and shinier surface finish.

3. Properties:

   • Grain Structure: Cold rolling leads to a refined grain structure, contributing to improved mechanical properties.
   • Tight Tolerances: Cold-rolled plates can achieve tighter thickness tolerances.

4. Applications:

   • Cold-rolled 304 stainless steel plates are preferred in applications where precise dimensions, smooth surface finish, and higher mechanical properties are critical, such as in precision engineering, automotive, and certain manufacturing applications.

Conclusion:

• The choice between hot rolling and cold rolling depends on the desired properties and applications of the final stainless steel plate.
• Cold-rolled plates are often chosen for applications where higher mechanical properties and a smooth surface finish are essential.
• Hot-rolled plates may be more suitable for applications where formability is crucial, and a rougher surface finish is acceptable.

Physical properties of 304 grade stainless steel in the annealed condition

Packing

304 Stainless Steel coil and strip is sleeved into plastic bag individually, pieces wrapped with water-proof material, bundled with nylon rope. Clear labels are tagged on the outside of the package for easy identification of the quantity and product I.D. Great care is taken during operation and transportation. SS 304 Stainless Steel coil packing will be according to international standard in bundles strapped by strips then into containers to avoid any damage.

Delivery: Within 10-25 days or asap if we have enough stock

Types of Packaging:

• - Bundles (hexagonal)
• - Wooden Boxes
• - Crates (steel/wooden)
• - Special crates for U-Bend tubes with each radius separated
• - Packaging for SS 304 Stainless Steel coil ASTM A240 as per customer's requirements

Special Features:

• - Each bundle covered with plastic for protection against extreme weather.
• - End of 304 Stainless Steel coil protected by plastic Strip.
• - Bundles strapped with plastic strips.
• - Each radius of U-Bend tube separated by a separator.
• - Packaging list (laminated) placed with box/crate.