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304 Stainless Steel Plate
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304 Stainless Steel Plate is the most widely used grade in the stainless steel family. It belongs to the 300 series austenitic stainless steel, known for its excellent corrosion resistance, good formability, and strong weldability. It is commonly used in construction, food processing equipment, chemical containers, and general industrial applications.
Chemical Composition of 304 Stainless Steel
| Element | Content (%) |
|---|---|
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 10.5 |
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Iron (Fe) | Balance |
The combination of chromium and nickel is the key factor that gives 304 stainless steel its corrosion resistance and stability.
Key Performance of 304 Stainless Steel Plate
1. Excellent Corrosion Resistance
- Strong resistance to atmospheric corrosion
- Performs well in water, mild acids, and most industrial environments
- Chromium forms a passive oxide layer that protects the surface
2. Good Formability and Fabrication
- Easy to bend, cut, and stamp
- Suitable for deep drawing and complex forming processes
- Maintains good surface quality after processing
3. Strong Weldability
- Can be welded using most common welding methods
- No need for preheating in most applications
- Good post-weld corrosion resistance
4. Good Mechanical Properties
- Balanced strength and ductility
- Suitable for structural and non-structural applications
- Non-magnetic in annealed condition
5. Heat Resistance
- Can withstand intermittent service temperatures up to ~870°C
- Good oxidation resistance at elevated temperatures
Common Forms of 304 Stainless Steel Plate
- Hot rolled plate (No.1 finish)
- Cold rolled plate (2B, BA finish)
- Polished and brushed surface plates
- Cut-to-size sheets and heavy plates
Common 300 Series Stainless Steel Grades
The 300 series stainless steel is the most widely used stainless steel family, especially for corrosion-resistant applications.
304 / 304L
- Most common stainless steel grade
- Excellent corrosion resistance and versatility
- 304L has lower carbon content for better welding performance
316 / 316L
- Contains molybdenum (Mo) for improved corrosion resistance
- Better performance in marine and chemical environments
- More resistant to chloride corrosion than 304
321
- Stabilized with titanium (Ti)
- Better resistance to intergranular corrosion
- Suitable for high-temperature applications
310S
- High chromium and nickel content
- Excellent high-temperature resistance
- Used in furnace and heat treatment equipment
304 vs Other 300 Series Grades
| Grade | Corrosion Resistance | Heat Resistance | Application Focus |
| 304 | Very Good | Good | General industrial use |
| 304L | Very Good | Good | Welding structures |
| 316 | Excellent | Very Good | Marine & chemical environments |
| 316L | Excellent | Very Good | Corrosive environments with welding |
| 321 | Very Good | Excellent | High-temperature service |
| 310S | Good | Excellent | Furnace and extreme heat |
Typical Applications
- Kitchen equipment and food processing machinery
- Chemical storage tanks
- Architectural decoration and building panels
- Industrial piping systems
- Medical and sanitary equipment
- Marine components (316 preferred for seawater)
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