SS 347 Stainless Steel
Round Bars Manufacturer
At Steel Icon Stainless Pvt. Ltd., we are a leading manufacturer and exporter of SS 347 Stainless Steel Round Bars, providing high-performance solutions for high-temperature and corrosive industrial applications. SS 347 is a niobium-stabilized austenitic stainless steel, offering superior resistance to intergranular corrosion and stress rupture at elevated temperatures, making it more suitable than standard chromium-nickel stainless steels for harsh environments.
Our SS 347 round bars are produced in compliance with global standards such as ASTM, ASME, EN, and DIN, ensuring top-quality performance for critical industries including chemical processing, power generation, heat exchangers, aerospace, and oil & gas.
| 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 |
|---|---|
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Material Grade |
SS 347
|
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Size Range |
5mm to 500mm
|
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Length |
Up to 6 meters (Custom cut lengths available) |
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Shapes & Types |
Bright, Black, Polished, Peeled, Centerless Ground
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Manufacturing Process
|
Hot Rolled, Cold Drawn, Peeled & Polished |
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Standards |
ASTM A276, ASTM A479, ASME SA276, EN 10088 |
Chemical Composition
| Element | SS 347 (%) |
|---|---|
|
Carbon (C) |
0.08 max |
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Chromium (Cr)
|
17.0–19.0
|
|
Nickel (Ni) |
9.0–12.0 |
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Niobium (Nb)
|
≥ 10x%C |
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Manganese (Mn) |
2.00 max |
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Silicon (Si) |
1.00 max |
Mechanical Properties
| Property | SS 347 |
|---|---|
|
Tensile Strength |
515 – 750 MPa |
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Yield Strength |
205 MPa min |
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Elongation (%) |
≥ 40% |
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Hardness (HRB) |
≤ 95 |
Types of Finishes Available
Hot Rolled Round Bars – Ideal for structural and heavy-duty applications, offering excellent strength and durability. These bars are cost-effective and widely used in construction and industrial settings.
Cold Drawn Round Bars – Provide superior dimensional accuracy and a smooth surface finish, making them perfect for precision applications that require tight tolerances and smooth surfaces.
Polished Round Bars – Available in finishes such as 2B, No.4, and mirror polished, these bars are suitable for decorative, aesthetic, and corrosion-resistant applications, especially in industries like automotive and architecture.
Peeled & Centerless Ground Bars – Known for their tight tolerances and excellent surface finish, these bars are ideal for applications requiring precise machining and minimal surface imperfections.
Applications
Chemical Processing Equipment – Ideal for reactor vessels, pipelines, and storage tanks, providing resistance to harsh chemicals and high temperatures in critical chemical processing environments.
Power Plants – Used in boiler tubes, superheater tubes, and steam piping, offering high strength and heat resistance to ensure reliable performance in power generation systems.
Aerospace Industry – Essential for manufacturing aircraft engine components and exhaust manifolds, providing strength and resistance to extreme temperatures and stresses encountered in aviation applications.
Petrochemical Plants – Perfect for heat exchangers and processing lines, ensuring reliable performance in high-temperature and chemically aggressive environments in petrochemical processing.
Refineries – Used in high-temperature fluid handling equipment, offering durability and resistance to the demanding conditions of refining processes.
Key Benefits
Superior Resistance to Intergranular Corrosion – Offers exceptional protection against corrosion, especially after exposure to high temperatures, ensuring long-term durability.
Maintains Strength and Stability at Elevated Temperatures – Retains mechanical properties even at high temperatures, making it ideal for applications in heat-intensive environments.
Excellent Weldability and Formability – Easy to weld and form, ensuring reliable and strong joints in various structural applications.
Enhanced Resistance to Stress Rupture and Creep – Withstands prolonged exposure to high stress and temperature, making it suitable for critical high-performance applications.
Performs Well Under Cyclic Heating and Cooling Conditions – Designed to handle fluctuations in temperature without losing its structural integrity, ensuring reliability in dynamic thermal environments.
Frequently Asked Questions
SS 347 offers better resistance to intergranular corrosion and stress rupture at high temperatures, especially after exposure to chromium carbide precipitation, making it more suitable for extended high-temperature service compared to SS 321.
Yes, SS 347 is highly weldable, and its niobium stabilization prevents carbide precipitation during welding, making it ideal for high-temperature welding applications.
SS 347 round bars are commonly used in industries such as aerospace, chemical processing, power generation, and petrochemical, particularly in applications exposed to high temperatures and corrosive environments.
Yes, we provide third-party inspection certifications and Mill Test Certificates (MTC) for SS 347 products to ensure compliance with industry standards and quality specifications.
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