SS 321 Stainless Steel
Round Bars Manufacturer
At Steel Icon Stainless Pvt. Ltd., we are a trusted manufacturer and exporter of SS 321 Stainless Steel Round Bars, offering superior solutions for high-temperature and corrosive service environments. SS 321 is a titanium-stabilized austenitic stainless steel that provides excellent resistance to intergranular corrosion, particularly after exposure to temperatures in the chromium carbide precipitation range (427°C – 816°C).
Our SS 321 round bars are produced in accordance with ASTM, ASME, DIN, and EN standards, and are widely used across industries such as thermal processing, chemical, aerospace, petrochemical, and power plants.
| Products |
|---|
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Stainless Steel Bar |
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Fasteners |
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Forged Products |
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Flanges |
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Forged Fittings |
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Stainless Steel Billets |
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Round Corner Square Billets |
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Stainless Steel Pipes |
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Pipe Fittings |
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Valve |
Specifications
| Property | Specification |
|---|---|
|
Material Grade |
SS 321
|
|
Size Range |
5mm to 500mm
|
|
Length |
Up to 6 meters (Custom cut lengths available) |
|
Shapes & Types |
Bright, Black, Polished, Peeled, Centerless Ground
|
|
Manufacturing Process
|
Hot Rolled, Cold Drawn, Peeled & Polished |
|
Standards |
ASTM A276, ASTM A479, ASME SA276, EN 10088 |
Chemical Composition
| Element | SS 321 (%) |
|---|---|
|
Carbon (C) |
0.08 max |
|
Chromium (Cr)
|
17.0–19.0
|
|
Nickel (Ni) |
9.0–12.0 |
|
Titanium (Ti)
|
≥ 5x%C |
|
Manganese (Mn) |
2.00 max |
|
Silicon (Si) |
1.00 max |
Mechanical Properties
| Property | SS 321 |
|---|---|
|
Tensile Strength |
515 – 750 MPa |
|
Yield Strength |
205 MPa min |
|
Elongation (%) |
≥ 40% |
|
Hardness (HRB) |
≤ 95 |
Types of Finishes Available
Hot Rolled Round Bars – Ideal for structural and heavy-duty applications, offering robust strength and performance, typically used in construction, automotive, and general engineering.
Cold Drawn Round Bars – Provide superior dimensional accuracy, smooth surface finish, and are ideal for precision applications where tight tolerances are critical.
Polished Round Bars – Available in a range of finishes, including 2B, No.4, and mirror polished, these bars are perfect for decorative, architectural, and high-end industrial applications.
Peeled & Centerless Ground Bars – Known for their tight tolerances and superior surface finish, these bars are ideal for high-precision machining applications requiring minimal surface defects.
Applications
Aircraft Exhaust Systems – Used in tubes, manifolds, and combustion chambers, providing heat resistance and durability in high-temperature, high-stress environments.
Chemical Processing Equipment – Ideal for tanks, pipes, and heat exchangers, offering excellent resistance to corrosive chemicals and high temperatures.
High-Temperature Gaskets – Perfect for flanges and piping components, ensuring reliable sealing and performance in extreme temperature conditions.
Thermal Processing Equipment – Used in heat treatment fixtures and oven parts, providing high strength and resistance to thermal cycling.
Power Plants – Essential for boiler tubes, superheaters, and expansion joints, offering reliable performance under high-pressure and high-temperature conditions in energy generation.
Key Benefits
Excellent Resistance to Intergranular Corrosion – Provides exceptional protection against corrosion, especially after exposure to temperatures in the chromium carbide precipitation range.
Superior Performance at High Temperatures – Performs reliably even in high-temperature environments, making it ideal for heat-intensive applications.
Stabilized Against Chromium Carbide Formation – Titanium stabilization prevents chromium carbide formation, ensuring long-lasting corrosion resistance.
Good Mechanical Strength and Weldability – Offers robust mechanical strength while maintaining excellent weldability, ensuring strong, durable joints.
Resists Oxidation Up to 870°C (1600°F) – Capable of withstanding oxidation in high-temperature environments, maintaining performance under extreme conditions.
Frequently Asked Questions
SS 321 contains titanium, which stabilises the material and prevents chromium carbide formation at high temperatures, making it more suitable for high-temperature applications than SS 304, which lacks this feature.
Yes, SS 321 is highly weldable due to its low carbon content, and it is often preferred for welding in high-temperature applications to prevent carbide precipitation.
SS 321 can be used in high-temperature applications, but it is better suited for environments where intergranular corrosion is a concern. SS 316, however, offers superior corrosion resistance in chloride-rich environments, making it more suitable for marine and chemical environments.
Yes, we provide third-party inspections and certification to ensure the SS 321 round bars meet industry standards and performance requirements.
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