Cold Rolled Stainless Steel Sheet In Coil

Cold rolled stainless steel sheet in coil offers superior:

Surface quality
Dimensional accuracy
Mechanical strength

The advanced cold rolling process makes it the preferred choice for precision manufacturing, decorative applications, and high-performance industrial use.

Description

Cold rolled stainless steel sheet in coil is produced by further processing hot rolled stainless steel through precision rolling at room temperature. The material is supplied in coil form, allowing continuous processing, cutting, and fabrication for industrial applications.

This product is widely used where tight tolerances, smooth surface finish, and consistent mechanical properties are required.

Cold Rolling Process of Stainless Steel

The cold rolling process involves multiple controlled steps to improve surface quality and dimensional accuracy.

1. Hot Rolled Coil Preparation

Raw material starts as hot rolled stainless steel coil (black coil)
Surface contains oxide scale and requires cleaning

2. Pickling

Acid treatment removes oxide scale
Produces a clean metallic surface for further rolling

3. Cold Rolling (Room Temperature Reduction)

Material is passed through rolling mills under high pressure
Thickness is reduced with high precision
Strength increases due to strain hardening

4. Annealing (Heat Treatment)

Restores ductility lost during cold rolling
Conducted in controlled atmosphere furnaces

5. Skin Pass / Temper Rolling

Light rolling process improves:
- Flatness
- Surface finish
- Mechanical consistency

6. Surface Finishing

Final finishes include:
- 2B (standard industrial finish)
- BA (bright annealed, mirror-like)
- Brushed or polished surfaces

7. Slitting and Recoiling

Coil is cut into required widths
Recoiled for delivery or further processing

Key Characteristics of Cold Rolled Stainless Steel Coil

Cold rolling significantly enhances the performance of stainless steel.

1. High Surface Quality

Smooth, clean, and uniform surface
Suitable for decorative and hygienic applications

2. Tight Dimensional Tolerance

Thickness accuracy typically within ±0.10 mm
Ideal for precision fabrication

3. Increased Strength

Work hardening improves:
- Yield strength
- Tensile strength

4. Excellent Flatness

Minimal waviness
Better performance in laser cutting and stamping

5. Good Formability (After Annealing)

Maintains ductility for:
- Bending
- Deep drawing
- Forming

Typical Thickness and Width Range

Parameter	Range
Thickness	0.3 mm – 6.0 mm
Width	600 mm – 2000 mm
Coil Weight	3 – 15 tons (typical industrial range)

Notes:

Most common thickness: 0.5 mm – 3.0 mm
Standard widths: 1000 mm, 1219 mm, 1500 mm

Mechanical Properties (General Range)

Property	Typical Value
Yield Strength	200 – 350 MPa
Tensile Strength	500 – 750 MPa
Elongation	35% – 50%
Hardness	Higher than hot rolled

Values vary depending on grade (e.g., 304, 316, 430).

Advantages Over Hot Rolled Stainless Steel

Feature	Cold Rolled	Hot Rolled
Surface Finish	Smooth	Rough
Tolerance	High precision	Lower precision
Strength	Higher	Lower
Flatness	Excellent	Moderate
Application	Precision & decorative	Structural