What temperature range is stainless steel 347 / 347H suitable for in furnace applications?
Stainless Steel 347 / 347H Furnace Tubes are highly suitable for a wide temperature range in furnace applications. These tubes offer excellent thermal stability and can withstand elevated temperatures without significantly degrading their mechanical properties. Typically, stainless steel 347 / 347H is capable of operating in temperatures ranging from approximately 800°C (1472°F) up to 1600°C (2912°F).

This impressive temperature range makes them ideal for various industrial furnace applications requiring high heat resistance. The alloy's superior heat resistance is primarily attributed to adding niobium, which forms carbides that stabilize the structure and prevent sensitization and intergranular corrosion at elevated temperatures. As a result, stainless steel 347 / 347H furnace tubes provide long-lasting performance and reliability in demanding furnace environments where temperature fluctuations and thermal stress are common.

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Stainless Steel 347 Furnace Tubes, 347H Stainless Steel Furnace Tube, SS 347 Furnace Tube, SS 347H Furnace Tubes, SS 347 Furnace Tubing, Stainless Steel 347H Furnace Tube, Stainless Steel 347H Furnace Tubes Supplier In Mumbai, India.

What are the key properties of stainless steel 347 / 347H furnace tubes?
Stainless Steel 347 Furnace Tubes possess several key properties that make them highly suitable for various applications. These tubes exhibit excellent corrosion resistance, particularly against intergranular corrosion and high-temperature oxidation. Adding niobium allows for carbide formation, which helps prevent sensitization and ensures enhanced resistance to intergranular corrosion. Stainless steel 347 furnace tubes also offer good mechanical properties, including high tensile and creep strength and weldability. Stainless steel 347 furnace tubes provide a reliable and durable solution for demanding industrial environments.

Stainless Steel 347H Furnace Tubes possess a range of key properties that make them highly suitable for furnace applications. These tubes offer excellent resistance to corrosion, particularly against intergranular corrosion and high-temperature oxidation. The higher carbon content in 347H provides improved high-temperature strength and enhanced resistance to sensitization. Stainless steel 347H furnace tubes also exhibit good mechanical properties, including high tensile and creep strength, making them capable of withstanding elevated temperatures. Additionally, they offer good weldability and are an ideal choice for applications where resistance to sensitization and intergranular corrosion is critical. Stainless steel 347H furnace tubes offer a robust and dependable solution for various industrial furnace applications.

Specification Of 347 Stainless Steel Furnace Tubes

Specifications ASTM, ASME, AISI
Outer Diameters 6mm – 300 mm OD
Thickness 1.0mm to 40mm
Length 5.8m, 6, Custom Lengths
Finish Annealed & Pickled, Bright Annealing, Polished
Test Certificate EN 10204 3.1

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  • Widest RangeStainless Steel 347 Furnace Stockholder

Check Stainless Steel 347/347H Other Pipes Tubes Types In Detail

347 Stainless Steel Furnace Tubes Equivalent Grades

Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
347 S34700 X6CrNiNb18-10 1.4550
347H S34709 1.4961

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Stainless Steel 347 Furnace Tubes Manufacturing Process

Selection of Materials

The materials used to make furnace tubes are typically resistant to corrosion and high temperatures. Stainless steel, alloy steel, and nickel-based alloys are common materials.

Tube Formation

The creation of the tubes is the first step in the procedure. This can be accomplished using a variety of techniques, including cold drawing, welded tube manufacture, and seamless tube extrusion. Due to their homogeneity and lack of seams that could compromise the structure, seamless tubes are frequently used for high-temperature applications.

Heating and Annealing

The tubes are subsequently put through heat-treating procedures, such as annealing. In order to reduce internal tensions, increase ductility, and improve the material's general qualities, annealing entails heating the tubes to a certain temperature and then gradually cooling them.

Cutting and Sizing

The tubes are sized and cut to the required lengths in accordance with the application's requirements. In order to ensure a perfect fit inside the furnace or heat exchanger, precise cutting and sizing are essential.

Surface Treatment

Depending on the application, the tubes may also go through passivation or pickling as additional surface treatments. By removing oxides, scale, and other contaminants from the surface, these processes increase corrosion resistance.

Quality Control

Quality control procedures are used all through the manufacturing process to guarantee that the tubes meet the necessary requirements. This entails a variety of tests, including visual inspections, non-destructive testing techniques like ultrasonic or radiographic testing, and dimensional checks.

Final Heat Treatment (Optional)

To achieve the appropriate mechanical and metallurgical qualities, the tubes may go through a final heat treatment procedure, such as stress relieving or solution annealing, depending on the material and desired properties.

Finishing

The tubes might undergo further finishing processes such as polishing, buffing, or coating to meet specific application requirements or aesthetic preferences.

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Chemical Composition Of Stainless Steel 347H Furnace Tubes

Grade C Mn Si P S Cr Mo Ni N
347 min. 17.0 2.00 9.0
max. 0.08 2.0 1.00 0.045 0.030 20.0 3.00 13.0
347H min. 0.04 17.0 3.00 9.0
max. 0.10 2.0 1.00 0.045 0.030 19.0 4.00 13.0

Mechanical Properties Of 347 Stainless Steel Furnace Tubes

Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
347 515 205 40 95 201
347H 515 205 40 92 201

Testing & Inspection of 347 Stainless Steel Furnace Tubes

Testing (Destructive, Non Destructive)

Positive Material Identification – PMI Testing Hydrostatic Test
Chemical Analysis – Spectro Analysis Hydrogen-Induced Cracking (HIC) Test
Mechanical Testing Such as Tensile, Elongation, Reduction of Area Sulfide Stress Corrosion Cracking (SSC), NACE TM 0177
Micro Test Radiography Test
Macro Test Dye Penetrant Test (DP Test)
Hardness Test Ultra Sonic Test (UT)
Pitting Resistance Test Eddy Current Testing
Intergranular Corrosion (IGC) Test Impact Test
Flaring Test Bend Test
Flattening Test

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Supply Cities Of Stainless Steel 347 And 347H Furnace Tubes

The cities listed here are where we have supplied our grade 347H stainless steel Furnace Tubes in bulk or small orders. Cities from metropolitan to rural areas we can provide SS 347 Furnace Tubes to satisfy the needs of our clients.

Kolkata, Ankara, Geoje-si, Hyderabad, Al Khobar, Ludhiana, Vadodara, Thane, Edmonton, Dallas, Hong Kong, Jaipur, Chandigarh, Visakhapatnam, Nashik, Sharjah, Port-of-Spain, Chennai, Courbevoie, Baroda, Calgary, Bhopal, Al Jubail, Kanpur, Dubai, Jamshedpur, Ahvaz, Sydney, Jakarta, Navi Mumbai, Nagpur, Haryana, Faridabad, Noida, Abu Dhabi, Singapore, New Delhi, Bogota, La Victoria, Mumbai, Madrid, Toronto, Istanbul, Cairo, Ranchi, Coimbatore, Ernakulam, Mexico City, Rajkot, Pimpri-Chinchwad, Busan, Pune, Houston, Petaling Jaya, Vung Tau, Gurgaon, Melbourne, Ho Chi Minh City, Dammam, Doha, Muscat, Caracas, Howrah, Thiruvananthapuram, Brisbane, Secunderabad, Seoul, Ulsan, Kuala Lumpur, Manama, Los Angeles, London, Granada, Riyadh, Moscow, Ahmedabad, Algiers, Atyrau, Hanoi, Indore, New York, Bangkok, Perth, Santiago, Bengaluru, Jeddah, Aberdeen, Kuwait City, Rio de Janeiro, Chiyoda, Lagos, Lahore, Montreal, Gimhae-si, Surat, Tehran, Karachi, Mumbai, Milan, Colombo.

Documents Provided at the time of Domestic Sales or Export of 347/347H Stainless Steel Furnace Tubes

Certificate of Origin Raw Material Test Reports
Commercial Invoice Heat Treatment Charts
Packing List Quality Assurance Plan (QAP)
Fumigation Certificates NABL approved Laboratory Test Reports
Letter of Guarantee Material Test Certificates
ROHS Certificate Certificate of Compliance/Conformity

Application Industries We Supply Stainless Steel 347 Furnace Tubes

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