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We specialize in the supply of a full range of 304 stainless steel coils and support customized processing services, accurately matching application requirements based on material performance and fabrication needs.
By Manufacturing Process:
Cold rolled 304 stainless steel coil, Hot rolled 304 stainless steel coil
By Surface Treatment Type:
304 Mirror Stainless Steel Coil (8K), 304 Brushed Stainless Steel Coil (Long / Short Grain), 304 Embossed Stainless Steel Coil, 304 Sandblasted Stainless Steel Coil
Specifications
| Item | Specification |
|---|---|
| Product Type | 304 Stainless Steel Coil |
| Manufacturing Process | Cold Rolled (CR), Hot Rolled (HR) |
| Thickness Range | Typically from thin gauge to medium thickness |
| Width | Standard mill width or custom slitting |
| Inner Diameter | Standard coil ID (e.g. 508 mm / 610 mm) |
| Coil Weight | As per mill standard or customer requirement |
| Surface Finish | 2B, BA, No.4, Polished |
| Edge Condition | Mill edge, slit edge |
| Supply Condition | Annealed and pickled |
| Processing Service | Slitting, cutting-to-length, leveling |
304 Stainless Steel Coil
304 stainless steel coil is a widely used austenitic stainless steel product known for its excellent corrosion resistance, good formability, and stable mechanical performance. It is commonly supplied in cold rolled or hot rolled condition and is suitable for further processing such as slitting, cutting, stamping, and forming.
Chemical Composition (Typical)
| Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Ni (%) |
|---|---|---|---|---|---|---|---|
| 304 | ≤ 0.08 | ≤ 1.00 | ≤ 2.00 | ≤ 0.045 | ≤ 0.030 | 18.0 – 20.0 | 8.0 – 10.5 |
Mechanical Properties (Typical)
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| 304 | ≥ 515 | ≥ 205 | ≥ 40 | ≤ 201 |
Heat Treatment of 304 Stainless Steel Coil
1. Annealing (Solution Treatment)
Temperature range: 1010–1120°C
Process: Rapid cooling in water or air after heating
Purpose: Restores maximum corrosion resistance and ductility after cold rolling
2. Stress Relieving
Applied after heavy cold working or forming
Helps minimize residual stresses and maintain dimensional stability
3. Hardening
304 stainless steel coil cannot be hardened by heat treatment
Strength improvement is achieved only through cold working
4. Performance Balance
Proper heat treatment prevents chromium carbide precipitation and maintains resistance to intergranular corrosion.
Ensures stable performance during forming, welding, and subsequent fabrication.
Features of 304 Stainless Steel Coil
Corrosion Resistance:
Excellent resistance to atmospheric corrosion and a wide range of chemical environments.
Formability:
High ductility allows easy rolling, bending, stamping, and deep drawing.
Surface Quality:
Uniform surface finish suitable for decorative and precision applications.
Weldability:
Compatible with common welding processes without complex pre-treatment.
Processing Flexibility:
Ideal base material for sheet cutting, strip slitting, and component fabrication.
Applications of 304 Stainless Steel Coil
Sheet and Plate Processing:
cut-to-length sheets, laser cutting blanks; recommended: cold rolled coils.
Appliance Manufacturing:
refrigerators, washing machines, kitchen equipment panels; recommended: BA or 2B finish.
Construction and Decoration:
cladding panels, ceilings, trims; recommended: thin gauge coils.
Food and Chemical Industry:
processing equipment, tanks, containers; recommended: annealed coils.
Automotive and Machinery Parts:
formed components requiring corrosion resistance and strength; recommended: medium thickness coils.
FAQ – 304 Stainless Steel Coil
Q1: What is the difference between stainless steel coil and sheet?
Stainless steel coil is supplied in continuous rolled form and can be further processed into sheets or strips, offering higher processing flexibility.
Q2: Is 304 stainless steel coil suitable for deep drawing?
Yes. Its austenitic structure provides excellent ductility, making it suitable for deep drawing and complex forming.
Q3: Can 304 stainless steel coil be welded directly?
Yes. Standard welding methods can be used without special heat treatment when proper procedures are followed.
Q4: Does 304 stainless steel coil rust easily?
No. It provides excellent corrosion resistance in normal atmospheric and mild chemical environments.