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SS304 Coil
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SS304 coil refers to cold rolled or hot rolled coils manufactured from AISI 304 stainless steel, one of the most widely used austenitic stainless steels in the world. Known for its excellent corrosion resistance, good formability, and strong mechanical performance, 304 stainless steel coil is widely used in construction, food processing, chemical equipment, and general fabrication.
Chemical Composition of SS304 Coil
SS304 belongs to the chromium-nickel austenitic stainless steel family. Its corrosion resistance and durability are primarily due to its chromium and nickel content.
| Element | Content (%) |
|---|---|
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 10.5 |
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
Key Role of Alloying Elements
Chromium (Cr) provides strong corrosion resistance by forming a passive oxide layer.
Nickel (Ni) enhances ductility, toughness, and overall corrosion resistance.
Low carbon content reduces the risk of intergranular corrosion during welding.
Mechanical Properties of SS304 Coil
Mechanical properties may vary depending on cold rolling or annealed condition. Typical values are:
| Property | Typical Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Hardness (HB) | ≤ 201 |
| Density | 7.93 g/cm³ |
| Modulus of Elasticity | 193 GPa |
Performance Characteristics
Excellent corrosion resistance in atmospheric and mildly corrosive environments.
Good weldability without preheating.
Outstanding formability and deep drawing capability.
High toughness even at low temperatures.
Non-magnetic in annealed condition (may become slightly magnetic after cold working).
Advantages of SS304 Stainless Steel Coil
Suitable for cold forming, bending, and stamping.
Easy to fabricate and polish.
Stable mechanical performance across various temperatures.
Widely accepted international material standard.
Typical Applications of SS304 Coil
Due to its balanced properties, SS304 coil is commonly used in:
Kitchen equipment and food processing machinery.
Architectural panels and decorative trim.
Chemical storage tanks and pipelines.
Automotive trim components.
Industrial fabrication and sheet metal processing.
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