EN 1.4550 stainless steel tubing is a niobium-stabilized austenitic stainless steel, equivalent to AISI 347, commonly used in the manufacture of high-temperature seamless tubes for boilers and heat exchangers. It offers excellent corrosion resistance, high creep strength, and resistance to intergranular corrosion, making it suitable for high-temperature and corrosive environments.
The EN 1.4550 stainless steel round tubes we supply exhibit excellent resistance to intergranular corrosion, especially within the carbide precipitation temperature range of 427 to 816°C. EN 1.4550 seamless tubes are non-magnetic in the annealed state and can only be hardened by cold working. Its minimum yield strength and tensile strength are 205 MPa and 515 MPa, respectively. EN 1.4550 welded tubes are easily formed and drawn and cannot be hardened by heat treatment.
TP347 stainless steel tubing plays a crucial role in the petroleum, chemical, and power industries. In the petroleum industry, TP347 stainless steel tubing for wells and pipelines, resisting high temperatures and pressures, and resisting crude oil corrosion. In the chemical industry, TP347 stainless steel tubing for heat exchangers to resist corrosion from various chemicals. In the power industry, TP347 stainless steel tubing for boilers and steam pipelines, ensuring the safe operation of power generation.
Specifications for EN 1.4550 Pipe
Standard: EN 10216-5 / ASTM A312 / A213
Type: Seamless / Welded Round Pipe
Size Range: 6mm – 610mm OD
Wall Thickness: 1mm – 30mm
Finish: Annealed & Pickled / Polished
End Type: Plain / Beveled / Threaded
Certification: EN 10204 3.1 / 3.2
Chemical Composition of TP347:
| TP347 | Maximum | Minimum |
|---|---|---|
| Ni | 13.00 | 9.00 |
| C | 00.08 | 00.04 |
| Mn | 2.00 | – |
| P | 00.045 | – |
| S | 00.030 | – |
| Si | 1.00 | – |
| Cr | 20.0 | 17.0 |
| Mo | 3 – 4 | – |
| N | – | – |
| OTHER | 1.0 | Nb=10(C+N) |
Mechanical Properties:
| Element | TP 347 |
|---|---|
| Melting Range | 1454 °C (2650 °F) |
| Tensile Stress | Psi – 75000 , MPa – 515 |
| Yield Stress (0.2%Offset) | Psi – 30000 , MPa – 205 |
| Elongation | 35 % |
| Hardness (Brinell) | 201 |
TP347 Tubing Physical Properties
| Grade | 347 |
|---|---|
| Density | 8000 kg/m3 |
| Elastic Modulus | 193 GPa |
| Specific Heat 0-1000C | 500 J/kg.K |
| Electrical Resistivity | 740 n.m |
Heat Treatment Requirements:
| Grade | UNS | Heat Treat Type | Austenitizing/ Solutioning Temperature, min or range °F [°C] | Cooling Media | ASTM Grain Size No. B |
| Designation | |||||
| TP347 | S34700 | Solution treatment | 1900 °F [1040 °C] | water or another rapid cool | . . . |
| TP347H | S34709 | Solution treatment | cold worked:2000 | water or another rapid cool | 7 |
| [1100] hot rolled: 1925 [1050]H |
347 Stainless Steel Tube Price List
| Price list | Price in USD |
|---|---|
| STAINLESS STEEL 347 ROUND TUBES Size: 3/8 | US $ 241.09 |
| ASME SA213 GRADE TP347 SEAMLESS STAINLESS STEEL TUBES SIZE: 57.83 X 3.25MW X 2996 | US $ 7.76 |
SS 347 Pipe and Tube Test Requirements
Eddy Current Test
Hydrostatic Tests
Ultrasonic Testing
Metalography Test
Visual Inspection
DP / MP / RF ECT Testing
CVN Impact Testing
TPP
Rockwell & BHN Hardness Testers
Highest quality packaging and shipping
All our stainless steel seamless pipes are packaged according to international standards to prevent any possible damage or loss. By default, we will bundle the finished pipes together in batches using thick woven plastic bags.
Customer Visit
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