🛠️ 1. Material Composition
| Aspect | Stainless Steel Flanges | Carbon Steel Flanges |
|---|---|---|
| Main Elements | Iron + Chromium (≥10.5%), often with Nickel | Primarily Iron + Carbon (≤2.1%) |
| Alloying Elements | May include Ni, Mo, Mn | Usually contains Mn, Si, S, P |
🧪 2. Corrosion Resistance
| Stainless Steel | Excellent corrosion resistance in most environments (especially 304, 316, Duplex) |
|---|---|
| Carbon Steel | Poor corrosion resistance; usually requires coating or painting for protection |
🔥 3. Temperature & Pressure Resistance
| Stainless Steel | Performs well at high temperatures and pressures, depending on grade |
|---|---|
| Carbon Steel | Good strength, but lower corrosion resistance limits high-temp use |
⚙️ 4. Mechanical Strength
Carbon Steel Flanges generally have higher tensile strength and hardness.
Stainless Steel Flanges offer a better balance of strength, ductility, and corrosion resistance.
💰 5. Cost
| Stainless Steel | More expensive due to alloy content and processing |
|---|---|
| Carbon Steel | More cost-effective for general applications |
🏗️ 6. Common Applications
| Stainless Steel Flanges | Food processing, pharmaceuticals, marine, chemical plants |
|---|---|
| Carbon Steel Flanges | Oil & gas, power plants, structural systems, waterworks |
📋 7. Appearance
| Stainless Steel | Smooth, shiny, resistant to tarnishing |
|---|---|
| Carbon Steel | Matte, darker, prone to rusting |
✅ Summary Table
| Property | Stainless Steel Flanges | Carbon Steel Flanges |
|---|---|---|
| Corrosion Resistance | High | Low (needs protection) |
| Strength | Moderate to high | High |
| Temperature Resistance | Excellent (varies by grade) | Good (lower corrosion resistance at high temp) |
| Cost | Higher | Lower |
| Durability | Long-lasting in harsh environments | May degrade without coating |
| Applications | Sanitary, corrosive settings | General industrial, structural |
