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SS 347 / SS 347H Stainless Steel Angle Channel is an austenitic chromium-nickel stainless steel that contains columbium, making it highly resistant to intergranular corrosion. These channels are designed to perform efficiently in environments exposed to high temperatures and corrosive substances. The addition of niobium helps stabilize the material against chromium carbide precipitation, enhancing its durability. SS 347 and SS 347H are commonly used in applications where continuous exposure to heat is expected. They maintain strength and toughness even after prolonged service. The high resistance to oxidation makes them ideal for chemical and thermal processing equipment.
The SS 347 / 347H Angle Channels are known for their excellent welding and forming capabilities, allowing them to be fabricated into various structures. They are used in industries such as petroleum refining, power generation, food processing, and pharmaceuticals. The "H" grade, SS 347H, has higher carbon content, which provides improved creep resistance and high-temperature strength. These channels are suitable for environments where temperatures exceed 1000°F (538°C). Their superior weldability ensures minimal distortion or cracking during manufacturing processes. These features make SS 347 / 347H a reliable choice for critical engineering applications.
Due to their outstanding mechanical strength, SS 347 / 347H Stainless Steel Angle Channels are frequently utilized in furnace parts, exhaust manifolds, heat exchangers, and jet engine components. Their ability to resist scaling and oxidation at elevated temperatures ensures long service life. The presence of niobium minimizes the formation of harmful carbide precipitates during welding, which maintains corrosion resistance. This makes the material suitable for welded constructions where post-weld heat treatment is impractical. Additionally, these angle channels offer good creep strength, making them ideal for prolonged service in heat-intensive conditions.
SS 347 / 347H Angle Channels also exhibit excellent performance under severe mechanical stress and thermal cycling conditions. Their high tensile strength and toughness make them durable in both high-pressure and low-temperature environments. These channels are available in various shapes and sizes to accommodate structural and fabrication needs. Industries prefer these channels because of their consistent mechanical performance and ease of maintenance. Their adaptability across multiple industrial sectors is a testament to their robust engineering and metallurgical properties. The channels are often polished for improved surface finish and corrosion protection.
The corrosion resistance of SS 347 / SS 347H Angle Channels extends to organic acids, inorganic chemicals, and oxidizing agents. They perform exceptionally well in chloride-free environments and in situations involving frequent heating and cooling cycles. Their microstructure remains stable, ensuring no loss of mechanical properties over time. This stability allows for extended use without degradation, reducing maintenance costs. They are particularly preferred in the construction of heat exchangers, boiler shells, and pressure vessels. Their resistance to sulfidation and carburization further enhances their suitability for harsh operational conditions.
Manufacturers produce SS 347 / 347H Stainless Steel Angle Channels using advanced rolling and forming techniques to ensure precision and uniformity. These channels can be supplied in hot rolled, cold rolled, or annealed conditions depending on the application. Their dimensional accuracy and smooth surface finish make them suitable for aesthetic as well as structural uses. The material’s ability to maintain performance under dynamic loading conditions makes it a top choice for engineers. Furthermore, their long-term reliability reduces downtime in critical industrial systems. Each channel undergoes strict quality testing to ensure compliance with international standards.
In conclusion, SS 347 / SS 347H Stainless Steel Angle Channels offer a perfect combination of corrosion resistance, high-temperature stability, and mechanical strength. They are ideal for applications that demand superior performance under heat and pressure. With excellent fabricability and weldability, these channels are used in various structural, mechanical, and industrial frameworks. Their long service life and minimal maintenance requirements make them a cost-effective solution. Whether used in refineries, chemical plants, or construction projects, SS 347 / SS 347H Angle Channels deliver reliable performance and structural integrity for decades.
Specification Table
| SS 347 / SS 347H Stainless Steel Angle Channel - Specification Table | |
|---|---|
| Grade | SS 347 / SS 347H |
| Standard | ASTM A276, A479 / ASME SA276, SA479 |
| Form | Angle, Channel, Flat, Equal & Unequal Angles |
| Size Range | 25mm x 25mm to 150mm x 150mm (or as required) |
| Thickness | 3mm to 20mm |
| Length | 3 Meters to 6 Meters (Custom Lengths Available) |
| Finish | Hot Rolled, Cold Drawn, Polished, Pickled |
| Manufacturing Process | Hot Rolled / Cold Formed |
| Applications | Chemical Processing, Power Generation, Heat Exchangers, Furnace Parts, Structural Frameworks |
Chemical Composition (Typical ranges for SSIS)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| SS 347 / SS 347H Stainless Steel Angle Channel - Chemical Composition | ||
|---|---|---|
| Element | SS 347 (%) | SS 347H (%) |
| Carbon (C) | 0.08 max | 0.04 – 0.10 |
| Manganese (Mn) | 2.00 max | 2.00 max |
| Phosphorus (P) | 0.045 max | 0.045 max |
| Sulfur (S) | 0.030 max | 0.030 max |
| Silicon (Si) | 1.00 max | 1.00 max |
| Chromium (Cr) | 17.0 – 19.0 | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 13.0 | 9.0 – 13.0 |
| Niobium + Tantalum (Nb + Ta) | 10 x C min – 1.00 max | 10 x C min – 1.00 max |
| Iron (Fe) | Balance | Balance |
Mechanical Properties (Typical)
| SS 347 / SS 347H Stainless Steel Angle Channel - Mechanical Properties | ||
|---|---|---|
| Property | SS 347 | SS 347H |
| Tensile Strength (MPa) | 515 min | 515 min |
| Yield Strength (0.2% Proof, MPa) | 205 min | 205 min |
| Elongation (%) | 40 min | 40 min |
| Hardness (Brinell HB max) | 217 max | 217 max |
| Melting Point (°C) | 1398 – 1446 | 1398 – 1446 |
| Density (g/cm³) | 8.0 | 8.0 |
| Modulus of Elasticity (GPa) | 193 | 193 |
Equivalent Grades
| SS 347 / SS 347H Stainless Steel Angle Channel - Equivalent Grades | ||||
|---|---|---|---|---|
| STANDARD | SS 347 | SS 347H | UNS | WERKSTOFF NR. |
| ASTM / ASME | AISI 347 | AISI 347H | S34700 / S34709 | 1.4550 / 1.4961 |
| EN | X6CrNiNb18-10 | X6CrNiNb18-12 | --- | --- |
| BS | 347S17 | 347S49 | --- | --- |
| JIS | SUS 347 | SUS 347H | --- | --- |
| GOST | 08Ch18N12B | 08Ch18N12B | --- | --- |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| SS 347 / SS 347H Stainless Steel Angle Channel - Dimension & Weight Chart | ||||
|---|---|---|---|---|
| Size (mm) | Thickness (mm) | Width x Height (mm) | Weight per Meter (kg/m) | Approx. Weight per 6 Meter (kg) |
| 25 x 25 | 3 | 25 x 25 | 1.13 | 6.78 |
| 30 x 30 | 3 | 30 x 30 | 1.37 | 8.22 |
| 40 x 40 | 4 | 40 x 40 | 2.23 | 13.38 |
| 50 x 50 | 5 | 50 x 50 | 3.49 | 20.94 |
| 65 x 65 | 6 | 65 x 65 | 5.85 | 35.10 |
| 75 x 75 | 6 | 75 x 75 | 6.82 | 40.92 |
| 90 x 90 | 8 | 90 x 90 | 10.80 | 64.80 |
| 100 x 100 | 8 | 100 x 100 | 12.00 | 72.00 |
| 130 x 130 | 10 | 130 x 130 | 18.10 | 108.60 |
| 150 x 150 | 12 | 150 x 150 | 25.90 | 155.40 |
Types Of SS 347/347H Angal channel
Stainless Steel Angal & channel
Monel 400 Angal & channel
Inconel 600 Angal & channel
Hastelloy Angal & channel
Super Duplex Angal & channel
Duplex Angal & channel
Nickel Angal & channel
Monel K500 Angal & channel
Frequently Asked Questions (FAQ)
What is SS 347 / SS 347H Stainless Steel Angle Channel?
SS 347 / SS 347H Stainless Steel Angle Channel is an austenitic chromium-nickel steel stabilized with niobium, designed to prevent intergranular corrosion and improve high-temperature strength. The SS 347H variant contains higher carbon content, providing better creep resistance in elevated temperature applications.
What is the difference between SS 347 and SS 347H?
The primary difference lies in the carbon content. SS 347H has a higher carbon level (0.04–0.10%) compared to SS 347 (0.08% max), which enhances its strength and creep resistance at high temperatures, making it suitable for heat exchanger tubes and furnace parts.
What are the key features of SS 347 / SS 347H Angle Channels?
Key features include excellent resistance to oxidation, corrosion, and scaling, superior mechanical strength, good weldability, and long service life. These channels perform efficiently under heat, stress, and corrosive environments, making them ideal for industrial use.
Where are SS 347 / SS 347H Angle Channels commonly used?
They are used in power plants, chemical processing units, oil refineries, food processing industries, and construction frameworks. Typical applications include heat exchangers, furnace components, pressure vessels, and exhaust manifolds.
What standards cover SS 347 / SS 347H Stainless Steel?
SS 347 / SS 347H Stainless Steel conforms to ASTM A276, A479, and ASME SA276 / SA479 standards. These specifications ensure the material’s mechanical and chemical properties meet industrial and engineering requirements.
Are SS 347 / SS 347H Angle Channels suitable for welding and fabrication?
Yes, SS 347 / 347H Angle Channels have excellent weldability and formability. The niobium stabilization prevents carbide precipitation during welding, maintaining corrosion resistance even in the heat-affected zones.
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