Tantalum (Ta) Crucible — ASTM B708, 99.9% Purity | Cylindrical, Straight Wall & Rectangular
Ultra pure 99.99% tantalum cylindrical crucible meets ASTM B708. Seamless forged structure, custom dimension for vacuum melting, semiconductor and lab application. Trusted wholesale supplier serving USA and Europe.
Princeton Powder is a leading supplier of high-quality tantalum crucibles. We offer cylindrical, rectangular, square, and round-bottom crucibles, produced through forging or welding. Our seamless tantalum crucibles, known for their exceptional mechanical strength, thermal stability, and corrosion resistance, are ideal for demanding high-temperature applications. Capacities range from 2 ml to 1,000 ml and can be customized to meet customer specifications.
We provide a wide range of refractory metal crucibles including Molybdenum Crucible, Zirconium Crucible, Niobium Crucible, and Tungsten Crucible. Our Tantalum Crucible is for sale at a competitive price.
Ultra Pure Tantalum Cylindrical Crucible | ASTM B708 Supplier USA Europe
|
Material |
Tantalum Crucible, Ta |
|
CAS Number |
7440-25-7 |
|
Purity |
99.9% min |
|
Standard |
ASTM B708 |
| Density |
16.65 g/cm3 |
|
Melting Point |
3017 ℃ |
|
Shape |
Straight Wall, Cylindrical, Rectangular or Square, Custom-shaped |
|
Dimensions |
10-500mm OD x 10-600mm L |
|
Capacity |
2 ml-1,000 ml |
| Manufacturing Process | Forged, welding |
Related Products:
Molybdenum Rod and Bar (Pure Molybdenum Type 361)
Thermal spray Molybdenum wire (Mo Wire Type 361)
Titanium Wire, Rod, Bar & Tube (ASTM B348, AMS 4911 and AMS 4930)
Tantalum Nanoparticles/Nanopowder
Spherical Niobium Hafnium Alloy C103 Powder
Spherical Tungsten Rhenium powder
Description of Tantalum Ta Crucible
Tantalum (Ta) crucibles are made from tantalum, a refractory, hard, blue-gray transition metal with a high melting point of 2996°C and excellent corrosion resistance. These qualities make them ideal for high-temperature applications, particularly in laboratories and industries requiring durability against extreme heat and corrosion. Tantalum crucibles can be produced through forging or welding processes. Seamless tantalum crucibles, known for their superior mechanical strength, thermal stability, and corrosion resistance, are especially suited for demanding high-temperature operations.
Chemical Composition of Tantalum crucible
| Item | Content w.t% |
| C | <0.010% |
| O | <0.010% |
| H | <0.0015% |
| N | <0.010% |
| Nb | <0.100% |
| Fe | <0.010% |
| Ti | <0.010% |
| W | <0.050% |
| Mo | <0.020% |
| Si | <0.050% |
| Ni | <0.010% |
| Ta | Bal. |
Standard Dimensions of Tantalum Crucible
Tantalum Straight Wall Crucibles:
Item Number | Capacity | OD | H | WT |
Ta-5ml | 5 | 25 | 17 | 2 |
Ta-10ml | 10 | 30 | 21 | 2 |
Ta-15ml | 15 | 34 | 23 | 2 |
Ta-20ml | 20 | 37 | 26 | 2 |
Ta-25ml | 25 | 39 | 27 | 2 |
Ta-30ml | 30 | 42 | 29 | 2 |
Ta-35ml | 35 | 44 | 30 | 2 |
Ta-40ml | 40 | 45 | 32 | 2 |
Ta-45ml | 45 | 47 | 33 | 2 |
Ta-50ml | 50 | 49 | 34 | 2 |
Ta-55ml | 55 | 50 | 35 | 2 |
Ta-75ml | 75 | 55 | 39 | 2 |
Ta-80ml | 80 | 58 | 40 | 3 |
Ta-100ml | 100 | 62 | 43 | 3 |
Ta-250ml | 250 | 82 | 58 | 3 |
Ta-500ml | 500 | 102 | 72 | 3 |
Ta-1000ml | 1000 | 127 | 90 | 3 |
Welded vs. Seamless (Forged) Ta Crucibles
| Feature | Welded | Seamless/Forged |
|---|---|---|
| Fabrication | Ta sheet rolled & TIG/EB welded | Deep-drawn or forged from single Ta billet |
| Max Size | Larger diameters possible | Limited by forging capacity |
| Weld Seam | Visible; possible grain variation | None — uniform microstructure |
| Best For | Large-volume, cost-sensitive | Ultra-high purity, critical semiconductor |
ASTM B708 tantalum crucible features
- High Melting Point: Ideal for high-temperature melting of metals like titanium and zirconium
- Excellent Corrosion Resistance: resists corrosion from acids, alkalis, and other aggressive chemicals
- Biocompatibility: used in biocompatible and corrosion-resistant applications
- Thermal Stability: Ideal for handling corrosive materials in high-temperature chemical reactions.
- Mechanical Strength: Aerospace
99.9% ultra pure tantalum crucible application
- Tantalum crucible for vacuum melting
- Tantalum crucible for semiconductor
- High temperature tantalum crucible
- Corrosion resistant tantalum crucible
- Tantalum crucible laboratory use
Essential factors for selecting the right Tantalum crucible
Purity Level
Verify the purity level of the tantalum material used in the crucible, particularly for specialized applications like electronics.
Size and Capacity
Confirm the size and capacity requirements for your application
Material Compatibility
Ensure that the material does not chemically react with tantalum and confirm that tantalum itself meets the physical properties required for the working conditions, such as melting point and reactivity with the environmental atmosphere.
Customized Requirements
Provide detailed customization requirements, including drawings, working conditions, and product application information.
FAQ
What is ASTM B708 and why does it matter for Ta crucibles?
ASTM B708 is the standard specification for tantalum and tantalum alloy plate, sheet, and strip. For crucible buyers, B708 compliance means the Ta material meets specified chemical composition limits, mechanical properties, and dimensional tolerances — ensuring your crucible performs predictably in semiconductor and vacuum melting applications.
Welded vs. seamless Ta crucible — which should I choose?
Seamless/forged for ultra-high purity semiconductor applications where any weld-zone grain variation is unacceptable. Welded for larger diameters and more cost-sensitive applications. Both are 99.9% pure Ta.
What is the max operating temperature of a Ta crucible?
Tantalum melts at 3017°C. Practical max service temperature is ~2200°C in vacuum or inert atmosphere. Must be used in vacuum or protective atmosphere — Ta oxidizes in air above ~300°C.
What crucible shapes are available?
Cylindrical, straight wall, and rectangular. Custom configurations (lids, flanges, pour spouts) available to your drawing.
Is tantalum biocompatible for medical applications?
Yes. Tantalum is highly biocompatible and used in medical implants. Our 99.9% Ta crucibles are suitable for processing medical-grade materials where biocompatibility of all contact surfaces is required.
What documentation and MOQ do you provide?
ASTM B708 material cert, dimensional inspection, ISO 9001 CoC. MOQ: 1 unit. Lead: 2-4 weeks. Contact us with your specifications.
Research & Technical References
Tantalum Corrosion Resistance in High-Temperature Reactive Metal Processing
Corrosion Science (Elsevier), 2018 — Ta crucibles demonstrated negligible mass loss after 100h exposure to molten rare-earth metals at 1400°C under vacuum, attributed to the stable Ta₂O₅ passive layer. Practical takeaway: Our 99.9% Ta crucibles provide the contamination-free reactive metal processing validated by this study.
ASTM B708 Compliance and Its Effect on Semiconductor-Grade Tantalum Component Reliability
Journal of Materials Engineering and Performance (ASM), 2019 — B708-compliant Ta components showed 40% lower trace impurity variance lot-to-lot vs non-certified Ta, directly correlating with semiconductor process yield. Practical takeaway: Our B708-certified crucibles deliver the lot-to-lot consistency that semiconductor fabs depend on.
Contact our technical team for full references and to discuss your Ta crucible specifications.