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Pure Tantalum Tube for Chemical Heat Exchangers: ASTM B521 Seamless and Welded Tubing for Hot Acid Service

Shaanxi Chuanghui Daye Metal Material Co., Ltd. supplies tantalum tubing for hot acid equipment. Pure Tantalum Tube is one item in the range, and it is made to ASTM B521. You can order it welded or without a seam. Both versions come annealed (M) or in the hard (Y) state. Purity is 99.95% (3N5) or 99.99% (4N). Eight grades are available: Ta1, Ta2, TaW2.5, TaW7.5, TaW10, TaNb3, TaNb20 and TaNb40. A Ta₂O₅ film forms on its own and repairs itself. That film is why the metal holds up to hydrochloric acid under 150 °C. It also stands up to nitric acid and sulfuric acid below 150 °C. For chemical heat exchangers, this tube is a sensible choice. Grades and limits are listed on this page. Tube types are covered here too, along with the checks to run when you place an order.

Specifications

The table shows data from the product specification for this tube. Check it against your project needs before you send an inquiry.

Outer Diameter (mm)	Wall thickness (mm)	Length(mm)
0.8~3.0	0.05~1.0	100≤L≤5000
3.0~80	0.2≤W≤5	100≤L≤5000

The specification data we received has gaps: outer diameter, wall thickness, length, tolerances, delivery time and minimum order quantity are not there. That is why they do not appear here. Send us your requirements and we will confirm what we can supply.

Electron beam melting

Forging

Rolling

Machining and forming

Dimension inspection

Packaging

Grades and Alloy Options

For this range, this product means the unalloyed Ta1 and Ta2 grades. The base metal is Grade R05200. It is made by electron-beam melting. Most acid-handling jobs can use it.

Tungsten gets added to the tantalum base in TaW2.5, TaW7.5 and TaW10. Grade R05252, the Ta-2.5W alloy, is the same thing as TaW2.5. TaNb3 sits in the tantalum-niobium group. So do TaNb20 and TaNb40. Send us your media. Add the temperature and the pressure. We will help you match the grade to the duty.

Key Properties That Matter in Service

A tantalum tube is dense. Heat does not weaken it either. Both traits affect how you design equipment and how you run it.

Melting point: 2996 °C.
Heat transfer: Thermal conductivity comes in at about 54–57 W/m·K. Borosilicate glass and zirconium both fall below that. So heat still moves through thin walls without trouble.
Ductility: Cold working is a good fit for this tube. Drawing, bending, and flaring cause no trouble. It will not turn brittle the way tungsten or molybdenum does.
Strength: For the annealed condition, the listed tensile strength of the tube sits above 205 MPa (30 ksi).
Purity: Metal contamination stays low when processes run at high purity. Pick a 99.95% (3N5) or 99.99% (4N) grade. That helps limit the risk.

Corrosion Resistance and Operating Limits

On the surface of tantalum sits a thin Ta₂O₅ film. Scratch it, and the film grows back. Because of this, the tube stays inert in hydrochloric acid, nitric acid, and sulfuric acid below 150 °C.

Heat does not pass through glass-lined steel as well as it does through tantalum. Mechanical wear is higher on glass-lined steel too. Titanium and Hastelloy sometimes corrode when acid is hot. Tantalum holds up there.

Work out where the limits sit first. Do that before you pick a tube:

Hydrofluoric acid: This acid attacks tantalum. Strength makes no difference. Solutions that carry fluoride act the same way. Why? Fluoride breaks the oxide layer down.
Hydrogen embrittlement: Tantalum soaks up atomic hydrogen. That hydrogen then piles up at the grain boundaries. Two cases raise the danger. A galvanic couple where tantalum ends up as the cathode is one. Stray currents are the other. Platinum spotting is a common way to stop it.
Air temperature: Oxidation starts above 250–300 °C. Past that point, run the tube under vacuum or in an inert gas like argon or helium. A silicide coating is another choice.

Be used in a wide range of industries.

Electronic devices

Medical implants

Steel industry

Chemical Processing

Aerospace and Defense

Energy and Environmental Engineering

Seamless Tube vs. Welded Tube

Which type of Pure Tantalum Tube fits your job comes down to two things: pressure and diameter.

Seamless tube is made by extrusion or by drawing. High-pressure service suits it well. Jobs that demand maximum homogeneity depend on it as well.

Larger diameters cost less with welded and drawn tube. The weld bead is worked down. That step brings the weld zone structure close to the parent metal. Ask us how the weld is processed. We can also confirm which inspection documents apply to your order.

You can get both types in annealed (M) or hard (Y) state. Annealed tube is easier to form. Hard-state tube suits parts that need no further forming.

Applications

Chemical processing: Shell-and-tube heat exchangers, bayonet heaters and U-bundle condensers in hot, concentrated sulfuric and hydrochloric acid need this product. Keep process temperatures under the acid-resistance limit given above. Is your service running above 150 °C? Speak to us first, before you place the order.

Pharmaceutical and fine chemicals: Reaction vessels and piping for high-purity active pharmaceutical ingredients (APIs) are built with tantalum. There is a simple reason. The metal does not react, so the product has less risk of contamination. Purity and documentation rules cover the full system, not one part. Check your own requirements with us before you order.

Semiconductor and laboratory instruments: Tantalum tubing protects thermocouples in high-temperature vacuum furnaces. It also goes into crucibles and fluid lines for liquid metal work. Resistance to liquid metal corrosion matters there, both for nuclear processing and for advanced electronic material processing.

ISO 9001:2015

Purchasing Considerations for B2B Buyers for Pure Tantalum Tube

Per kilogram, tantalum costs much more than nickel alloys like Hastelloy. That gap can shrink in harsh acid service. A design with little or no corrosion allowance may allow thinner walls. Service life can also be longer. Look at total cost of ownership, not just unit price.

Confirm these points when requesting a quote for Pure Tantalum Tube:

Grade and purity level
State: annealed (M) or hard (Y)
Tube type: seamless or welded
Media, including any fluoride content
Maximum operating temperature and atmosphere
Size requirements and quantity
Documents your project requires

Send these details and we will confirm what can be supplied for your project.

Why Work With Chuanghui Daye

We are based in the Baoji High-tech Development Zone, Shaanxi Province. Rare metal work has been our founder's field for over 30 years.

Titanium is one metal we offer. Tantalum is another. Our range also covers niobium, tungsten, molybdenum, zirconium and nickel. Other non-ferrous and rare metal alloy products are available too. These products serve the metallurgy field. Electronics is another area we serve. Medical work is a third. Special steel is also on the list. Buyers in the United States purchase from us. Germany is another market. South Korea buys our products too. Singapore is also a customer. More than 50 countries and regions buy from us.

Your project may need certain test reports. Other documents might be needed as well. Let us know when you send your inquiry. We will check what we can provide.

Titanium Rod For Sale

Certification

Tantalum and Tantalum Alloys Tube Dimension and Tolerance (mm)
Outer Diameter	Outer Diameter Tolerance	Wall Thickness	Outer Diameter	Outer Diameter Tolerance	Wall Thickness Tolerance
		Tolerance
	± 0.04	± 10% of Wall Thickness		± 0.06	± 10% of Wall Thickness
> 5 - 15	± 0.08		> 15 - 25	± 0.10
> 25 - 35	± 0.13		> 35 - 40	± 0.13
> 40 - 50	± 0.15

FAQ

Q: Can a tantalum tube stand up to hydrofluoric (HF) acid?

A: Not at all. Any concentration of HF will attack tantalum. The same goes for acidic solutions that contain fluoride ions.

Q: How big is the danger of hydrogen embrittlement?

A: Atomic hydrogen gets absorbed by tantalum, and the metal then turns brittle. Platinum spotting is a usual way to stop this.

Q: What sets a seamless tantalum tube apart from a welded one?

A: Go with seamless tube for high pressure service, and for the most even wall structure. Once the diameter gets large, welded and drawn tube comes in cheaper.

Q: What temperature makes tantalum tube start to oxidize in air?

A: Oxidation begins once the temperature goes above 250–300 °C. Past that point, switch to vacuum or inert gas. A silicide coating works too.

Q: How does the cost compare to Hastelloy?

A: Tantalum costs considerably more per kilogram. In severe acid service, thinner walls and a long service life can narrow the gap in total cost.

Q: Which grades and states can you supply?

A: We supply Ta1, Ta2, TaW2.5, TaW7.5, TaW10, TaNb3, TaNb20 and TaNb40, in annealed (M) or hard (Y) state, as seamless or welded tube. Ta1 and Ta2 are the unalloyed grades.

Contact Us

Email your grade, state, tube type, Pure Tantalum Tube, size requirements and operating conditions to info@chdymetal.com. Someone from our team will go through the details and get back to you.