321 SS Rounds Bars and Rods 347 SS Rounds Bars, and Rods
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Product Description:
321 and 347 stainless steel round bars and rods are high-performance austenitic stainless steels designed for use in high-temperature and highly corrosive environments. These grades are stabilized with titanium (321) and niobium (347) to prevent intergranular corrosion, making them ideal for applications requiring strength and durability in elevated temperatures.
321 Stainless Steel
- Stabilized with titanium to resist intergranular corrosion.
- Excellent high-temperature performance and oxidation resistance.
- Suitable for welding and high-stress environments.
347 Stainless Steel
- Stabilized with niobium and tantalum to enhance resistance to intergranular corrosion.
- Performs well in strongly oxidizing environments and high temperatures.
- Preferred for use in highly corrosive and elevated-temperature applications.
Key Features of 321/347 Stainless Steel Round Bars and Rods
- High Temperature Resistance: Suitable for temperatures up to 870°C in continuous service.
- Oxidation Resistance: Exceptional performance in oxidizing conditions.
- Intergranular Corrosion Resistance: Prevents carbide precipitation, ensuring long-term durability.
- Ease of Fabrication: Can be readily welded and formed for custom applications.
- Non-Magnetic: Non-magnetic in the annealed condition but may develop slight magnetism after cold working.
Common Applications
- Aerospace: Components exposed to high stress and elevated temperatures.
- Chemical Processing: Heat exchangers, reactors, and storage tanks.
- Petrochemical Industry: Refining equipment and piping.
- Automotive: Exhaust manifolds and other high-temperature components.
- Food Processing: Equipment for handling and storage of acidic and salty products.
- Pharmaceutical: Sterile and high-temperature processing equipment.
Chemical Composition
| Element | 321 (%) | 347 (%) |
|---|---|---|
| Carbon (C) | 0.08 (maximum) | 0.08 (maximum) |
| Chromium (Cr) | 17.0–19.0 | 17.0–19.0 |
| Nickel (Ni) | 9.0–12.0 | 9.0–13.0 |
| Titanium (Ti) | ≥ 5 × C | - |
| Niobium (Nb) | - | 10 × C (minimum) |
| Manganese (Mn) | 2.0 (maximum) | 2.0 (maximum) |
| Silicon (Si) | 0.75 (maximum) | 0.75 (maximum) |
| Sulfur (S) | 0.03 (maximum) | 0.03 (maximum) |
| Phosphorus (P) | 0.045 (maximum) | 0.045 (maximum) |
Mechanical Properties
| Property | 321 | 347 |
|---|---|---|
| Tensile Strength (MPa) | 515 (minimum) | 515 (minimum) |
| Yield Strength (MPa) | 205 (minimum) | 205 (minimum) |
| Elongation (%) | 40 | 40 |
| Hardness (HRB) | 95 (maximum) | 95 (maximum) |
Available Sizes and Shapes
- Sizes: Diameters ranging from 6mm to 300mm.
- Shapes: Round bars, square bars, hexagonal bars, and custom profiles.
- Length: Standard lengths or customized as per project needs.
Surface Finishes
- Hot Rolled: Suitable for heavy-duty applications.
- Cold Drawn: Smooth surface finish with tighter tolerances.
- Polished: For aesthetic and corrosion-resistant applications.
Value-Added Services
- Precision Cutting: Bars and rods tailored to exact dimensions.
- Heat Treatment: Annealing and stress-relieving for optimal properties.
- Surface Treatments: Polishing and pickling for enhanced durability and appearance.
- Testing and Certification: Full compliance with ASTM, ASME, and other international standards.
Contact Us for Premium Stainless Steel Bars
Looking for top-quality 321 and 347 stainless steel round bars and rods? Contact us today for expert guidance, competitive pricing, and customized solutions tailored to your project requirements.
