Unlike several stainless steel alloys grade, 347 is a heat resistant metal. In order to stabilize the alloy, two elements, that are columbium and tantalum have been added into the chemistry of 347 Stainless Steel Seamless Tubes. Both columbium and tantalum are elements that are known as Refractory metals. A Refractory metal is referred to elements that offer high resistance to both, heat as well as wear. And so it is not uncommon to find the WERKSTOFF NR.1.4550 Heat exchanger Tube in applications involving high temperatures. Since heat exchangers give off a lot of heat during their processes, many ASTM A213 TP 347 Instrumentation Tubes find use in said application.
Furthermore, heat in combination with high-pressure wears the system. The use of columbium and tantalum stabilized alloy like the Stainless Steel 347 Seamless Tube suits these applications. Not only does alloy 347 have great heat resistance properties, but it has the ability to resist intergranular corrosion. The occurrence of chromium carbides is problematic at a temperature range of 800°F to 1500°F. It is during this temperature range that several alloys tend to notice a decline in their mechanical properties. However, the SS 347 Cold Rolled Coiled Tubing does not experience a decline in its mechanical properties, despite exposure to a temperature as high as 1500°F.
Yet, the more notable properties of ASTM A249 TP 347H Welded Tube include a higher creep strength and high stress rupture properties, both of which are significantly higher than grades 304 and 304L. In several instances, grade 304L is traded for a more sturdy and durable UNS S34700 U Tube, because the former tend to be vulnerable to intergranular corrosion. A trait the alloy shares with its austenitic stainless steel is that the SS 347 ERW Tubing has good low temperature toughness.
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Standard |
ASTM, AISI, GB, JIS, customers' requests available |
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Size |
Round Tube: OD: 16-119mm or customized |
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Thickness |
0.25mm-3.0mm |
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Length |
6m or according to customers' request |
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Sample |
Free sample is available, but freight should be paid by you |
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Tolerance
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Outer diameter: ±0.2mm |
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Thickness: ±0.05mm |
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Length: ±0.5mm |
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Ends |
In plain end or bevelled ends or as your requirements |
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Welding Line Type |
ERW (Electrical Resistance Weld) |
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Finishing
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A. Sanded |
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B. Gloss #400,Mirror #600 - #1000 |
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C. Brushed |
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D. Wood Grain |
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E. Embossed, Threaded |
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Application |
Decorations, constructions, food industry, etc. |
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Certification |
ISO, SGS |
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Round Pipe Size |
16, 17, 18, 19, 20, 21, 22, 23, 25, 28, 31.8, 35, 36, 38.1, 48, 50.8, 60, 63.5, 76.2, 89, 101, 114 mm |
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Square Pipe Size |
17, 18, 19, 20, 21, 22, 23, 24, 25, 28, 30, 36, 38, 50 mm |
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Rectangle Pipe Size |
10*30, 10*40, 10*50, 20*10, 23*11, 24*12, 25*13, 28*25, 28*13, 29*14, 30*15, 30*20, 30*22, 34*22, 36*23, 50*25, 60*30, 75*45, 95*45 mm |
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Thickness |
exact 0.25, 0.28, 0.32, 0.37, 0.41, 0.51, 0.61, 0.71, 0.91, 1.11, 1.15, 1.41 mm |
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Length |
6m or according to customer’s request |
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Outer diameter |
6.35-219mm |
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Tolerance |
Outer diameter :±0.2mm |
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Thickness :±0.02mm |
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Length :±0.5mm |
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Process method |
Code drawn, annealed with nitrogen protection, ultrasonic, automatic shape, polished |
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Test |
Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector |
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Equipment |
Press machine, Bending machine, Pushing Machine, electric bevelling machine Sand-blasting machine, etc |
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Origin |
West Europe / Japanese / Indian / USA / Korean / American / European |
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Test Certificates |
Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report |
| Element | TP 347 |
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| Density | 8.0 g/cm3 |
| 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 | 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) |
| STANDARD | WERKSTOFF NR. | UNS |
|---|---|---|
| SS 347 | 1.4550 | S34700 |
| SA213 TP347 Seamless Round Tubing | SA213 TP347 Electropolished Tube |
| ASTM A213 TP 347 Cold Drawn Seamless Tube | SA 213 Grade 347 Round Tube |
| 347 Stainless Steel Metric Tubing | SA 213 TP 347 Stainless Steel Thin Wall Tubing |
| SA213 347 SS Decorative Tube | ASME SA213 TP347 Polished Tube |
| DIN 1.4550 Stainless Steel 347 Polish Tube | ASTM A 213 347 Stainless Steel Elliptical and Oval Tubes |
| SA 213 TP 347 Stainless Steel High Pressure Tube | ASTM A213 TP 347 Heat exchanger Tubes |
