Tantalum Granules, Pellets & Evaporation Materials — ASTM B365 Supplier

Tantalum Pellets, also called Tantalum granules, which are compacted by Tantalum powder using cold pressing or isostatic pressing techniques. Tantalum Pellets are widely used for the Sputtering Target Manufacturing. High-purity tantalum pellets are melted using vacuum arc remelting (VAR) to create ingots for tantalum sputtering targets.

Princeton Powder is a leading supplier of tantalum pellets in the United States. Tantalum granules in a variety of diameters are available for sale.

Material	Tantalum Granules, Tantalum Pellets, Tantalum Evaporation Materials
CAS Number	7440-25-7
Standard	ASTM B365, ASTM F560 (Medical Grade)
Grade	R05200, R05400, R05252 (Ta2.5W), R05255 (Ta10W), R05240 (Ta40Nb)
Density	16.65 g/cm3
Melting Point	3020 ℃
Size	10 mm max
Purity	99.9% min

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Product Overview

Tantalum granules and tantalum pellets are high-purity (99.9% min) compacted forms of tantalum metal, manufactured by cold pressing or isostatic pressing of tantalum powder (CAS 7440-25-7). Princeton Powder supplies tantalum evaporation materials in multiple grade specifications — R05200 (unalloyed), R05252 (Ta-2.5W), R05255 (Ta-10W), and R05240 (Ta-40Nb) — fully compliant with ASTM B365 and ASTM F560 (medical grade) standards.

Our tantalum granules and pellets are engineered specifically for sputtering target manufacturing and vacuum evaporation coating processes. The material is melted via vacuum arc remelting (VAR) to produce high-density ingots, then processed into uniform granules with tightly controlled size distribution (10 mm max). With a density of 16.65 g/cm³ and melting point of 3,020°C, tantalum delivers exceptional film purity and corrosion resistance for semiconductor, optical coating, and medical implant applications. Custom sizes and alloy compositions available — request a quote.

Technical Specifications

Chemical Compositions of Tantalum Evaporation Materials

Grade	Chemical Composition (≤%）
Grade	Ta	Fe	Si	Ni	W	Mo	Ti	Nb	O	C	H	N
Ta1	Bal.	0.005	0.005	0.002	0.01	0.01	0.002	0.03	0.015	0.01	0.0015	0.01
Ta2	Bal.	0.03	0.02	0.005	0.04	0.03	0.005	0.1	0.02	0.01	0.0015	0.01
TaNb3	Bal.	0.03	0.03	0.005	0.04	0.03	0.005	<3.5	0.02	0.01	0.0015	0.01
TaNb20	Bal.	0.03	0.03	0.005	0.04	0.03	0.005	17.0-23.0	0.02	0.01	0.0015	0.01
Ta2.5W	Bal.	0.005	0.005	0.002	3.0	0.01	0.002	0.04	0.015	0.01	0.0015	0.01
Ta10W	Bal.	0.005	0.005	0.002	11	0.01	0.002	0.04	0.015	0.01	0.0015	0.01

Physical Properties of Tantalum Granules

Product condition	Tensile strength (MPa)	Elongation, %
Annealed	300～600	10～30
Half annealed	>600～1000	<5
Unannealed	>1000	<5

Applications of Tantalum Granules & Evaporation Materials

Semiconductor & Electronics

Tantalum granules are the primary source material for tantalum sputtering targets used in semiconductor wafer fabrication. The high purity (99.9% min) ensures minimal particle contamination during physical vapor deposition (PVD). Tantalum thin films serve as diffusion barriers between copper interconnects and silicon substrates in advanced chip manufacturing.

Optical & Thin-Film Coatings

Tantalum evaporation pellets are widely used in electron-beam (e-beam) evaporation for depositing high-refractive-index optical coatings. Tantalum pentoxide (Ta₂O₅) films produced from our granules deliver excellent transparency in the visible spectrum and are used in anti-reflective coatings, laser mirrors, and precision optical filters.

Medical Implant Manufacturing

ASTM F560 compliant tantalum is a biocompatible metal used in surgical implants, bone repair scaffolds, and radiographic markers. Its excellent osseointegration properties and corrosion resistance in body fluids make it the material of choice for long-term implantable devices.

Why Choose Princeton Powder for Tantalum Materials

Full Material Traceability: Every lot includes Certificate of Analysis (COA) with chemical composition, particle size distribution, and mechanical properties.
Multiple Grade Availability: Stocking supplier of R05200, R05400, R05252 (Ta-2.5W), R05255 (Ta-10W), and R05240 (Ta-40Nb).
Custom Processing: Custom granule sizes, alloy compositions, and packaging configurations for OEM requirements.
ISO 9001:2015 Certified: Quality management system ensures batch-to-batch consistency.
US-Based Inventory: Domestic stock eliminates long international lead times. Same-day quotes, fast shipping.
Technical Support: Application engineers available for material selection and process optimization.

Frequently Asked Questions About Tantalum Granules & Pellets

What is the difference between tantalum granules and tantalum pellets?

Tantalum granules are smaller, irregular-shaped particles typically used for melting into ingots or direct evaporation. Tantalum pellets are larger, more uniformly shaped compacts produced by cold/isostatic pressing of tantalum powder, optimized for consistent melting behavior in e-beam evaporation. Princeton Powder supplies both forms with sizes up to 10 mm. Contact us to discuss your specific process requirements.

What purity levels are available for tantalum evaporation materials?

Princeton Powder supplies tantalum granules and pellets at 99.9% (3N) minimum purity, with 99.95% (3N5) and 99.99% (4N) available on request. Our chemical composition specifications cover 6 grades: Ta1 (unalloyed, highest purity), Ta2, TaNb3, TaNb20, Ta-2.5W, and Ta-10W. Full COA documentation provided with every order.

What is ASTM B365 and why does it matter for tantalum materials?

ASTM B365 is the standard specification for tantalum and tantalum alloy rod, wire, and strip. For medical applications, ASTM F560 governs unalloyed tantalum for surgical implants. Princeton Powder tantalum products comply with both standards, ensuring your sputtering targets and evaporation materials meet industrial and medical regulatory requirements.

What is the minimum order quantity (MOQ) for tantalum granules?

Standard MOQ is 1 kg for stock tantalum granule and pellet grades. Custom alloys, non-standard sizes, or ultra-high-purity (99.99%+) specifications may have higher MOQs. Contact our sales team for a same-day quote — we routinely fulfill orders from R&D sample quantities to full production volumes.

How are tantalum granules packaged for international shipping?

Tantalum granules and pellets are packaged in sealed, moisture-resistant containers with protective cushioning to prevent particle breakage during transit. Each shipment includes full documentation: Commercial Invoice, Packing List, Certificate of Origin, and material COA. We ship globally via DHL, FedEx, and freight forwarders. Standard handling time: 3-7 business days.

Can you customize tantalum granule size or alloy composition?

Yes. Princeton Powder offers custom granule size distributions, custom alloy compositions (Ta-W, Ta-Nb, Ta-Mo), and custom packaging configurations. Our engineering team works with your specifications to produce tantalum materials optimized for your specific sputtering or evaporation process. Contact us with your requirements for a feasibility assessment and quote.