SS 347 Stainless Steel
Round Bars Manufacturer
At Steel Icon Stainless Pvt. Ltd., we are a renowned 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 compared to standard chromium-nickel stainless steels.
Our SS 347 round bars are produced in compliance with international standards such as ASTM, ASME, EN, and DIN, making them ideal for use in chemical processing, power generation, heat exchangers, aerospace, and oil & gas industries.
| 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 347
|
|
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 347 (%) |
|---|---|
|
Carbon (C) |
0.08 max |
|
Chromium (Cr)
|
17.0–19.0
|
|
Nickel (Ni) |
9.0–12.0 |
|
Niobium (Nb)
|
≥ 10x%C |
|
Manganese (Mn) |
2.00 max |
|
Silicon (Si) |
1.00 max |
Mechanical Properties
| Property | SS 347 |
|---|---|
|
Tensile Strength |
515 – 750 MPa |
|
Yield Strength |
205 MPa min |
|
Elongation (%) |
≥ 40% |
|
Hardness (HRB) |
≤ 95 |
Types of Finishes Available
- Hot Rolled Round Bars
- Cold Drawn Round Bars
- Polished Round Bars
- Peeled & Centerless Ground Bars
Applications
- Chemical Processing Equipment – Reactor vessels, pipelines, and storage tanks
- Power Plants – Boiler tubes, superheater tubes, and steam piping
- Aerospace Industry – Aircraft engine components and exhaust manifolds
- Petrochemical Plants – Heat exchangers and processing lines
- Refineries – High-temperature fluid handling equipment
Key Benefits
- Superior resistance to intergranular corrosion
- Maintains strength and stability at elevated temperatures
- Excellent weldability and formability
- Enhanced resistance to stress rupture and creep
- Performs well under cyclic heating and cooling conditions
Frequently Asked Questions
SS 347, stabilized with niobium, offers better resistance to creep and stress rupture compared to titanium-stabilized SS 321.
Yes, it has excellent weldability without the risk of intergranular corrosion.
In high-temperature, high-pressure environments like chemical plants, refineries, and aerospace.
Yes, we offer mill test certificates and third-party inspections upon request.
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