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304 Stainless Steel Plate
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304 stainless steel plate is the most widely used austenitic stainless steel in the global market. It is known for its excellent corrosion resistance, good formability, and stable mechanical properties, making it the standard material for general industrial and commercial applications.
It is often considered the “basic grade” of stainless steel before upgrading to higher-performance materials like 316.
Chemical Composition of 304 Stainless Steel
| Element | Content (%) | Function |
|---|---|---|
| Chromium (Cr) | 18 – 20% | Forms protective oxide layer |
| Nickel (Ni) | 8 – 10.5% | Improves corrosion resistance and toughness |
| Carbon (C) | ≤0.08% | Strength control |
| Manganese (Mn) | ≤2% | Improves hot working performance |
| Silicon (Si) | ≤1% | Enhances processing stability |
Key Characteristics of 304 Stainless Steel Plate
1. Excellent General Corrosion Resistance
- Resistant to most atmospheric environments
- Performs well in water, humidity, and mild chemicals
- Forms a stable passive oxide layer
2. Good Mechanical Properties
- Balanced strength and ductility
- Easy to form, bend, and weld
- Suitable for mass production and fabrication
3. Strong Processing Performance
- Good machinability
- Excellent stamping and forming ability
- Widely used in sheet metal fabrication
4. Wide Application Range
- Most commonly used stainless steel grade globally
- Suitable for both industrial and commercial products
304 vs 316 Stainless Steel Plate – Key Differences
Although both belong to austenitic stainless steel, 304 and 316 differ mainly in alloy composition and corrosion resistance level.
1. Chemical Composition Difference
| Element | 304 | 316 |
|---|---|---|
| Chromium (Cr) | 18–20% | 16–18% |
| Nickel (Ni) | 8–10.5% | 10–14% |
| Molybdenum (Mo) | 0% | 2–3% |
The key difference is molybdenum in 316, which significantly improves corrosion resistance.
2. Corrosion Resistance
- 304: Good general corrosion resistance
- 316: Excellent resistance in chloride, saltwater, and chemical environments
👉 316 performs better in marine and chemical conditions.
3. Application Environment
| Application | 304 | 316 |
|---|---|---|
| Indoor use | Excellent | Excellent |
| Outdoor environment | Good | Better |
| Marine environment | Limited | Excellent |
| Chemical industry | Moderate | Strong |
4. Cost and Usage
- 304: Lower cost, most widely used
- 316: Higher cost, used in more demanding environments
Why 304 Stainless Steel is the Most Common Grade
304 remains the most widely used stainless steel because:
- Balanced performance (strength + corrosion resistance)
- Easy fabrication and welding
- Stable global supply
- Cost-effective for most applications
Typical Applications of 304 Stainless Steel Plate
- Kitchen equipment
- Food processing machinery
- Building decoration
- Industrial containers
- Household appliances
- General engineering structures
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