Tantalum Foil and Strip

CAS Number:	7440-25-7
Standard:	ASTM B708, ISO 13602, ASME SB-708
Purity:	≥99.9% or 99.95%
Size:	0.01-0.07mm Thick x 30-200mm width x >50mm length, Foil 0.01-0.03mm Thick x 1.0-1.5mm width x ≤50000mm length, Strip
Material Grade:	R05200, unalloyed tantalum, electron-beam furnace or vacuum-arc melt, or both R05400, unalloyed tantalum, powder-metallurgy consolidation.

 

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Product Description

Tantalum foil and strip are ultra-thin, high-purity forms of tantalum metal that are designed for applications requiring excellent corrosion resistance, thermal stability, and biocompatibility. These products are frequently used in the electronics, aerospace, and medical industries for their exceptional performance under extreme conditions.

 

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Features and Properties

Exceptional Purity: Up to 99.95% or higher for critical applications.

Corrosion Resistance: Inert to most acids, including hydrofluoric acid.

Thermal Stability: Retains strength and integrity at temperatures above 2000°C.

Ductility: Easily formed into complex shapes without compromising material integrity.

Conductivity: High electrical and thermal conductivity.

 

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Product Forms

Foil: Ultra-thin sheets for precision applications such as capacitors and chemical linings.

Strip: Wider and thicker strips for structural and industrial uses.

 

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Production Method and Production Equipments

Vacuum Electron Beam Melting: Ensures high-purity tantalum.

Hot and Cold Rolling Mills: Achieve desired thickness and surface quality.

Annealing Furnaces: Restore ductility and reduce residual stress.

Precision Slitting Machines: Create foil and strip with tight dimensional tolerances.

Polishing Equipment: For surface customization and enhanced usability.

 

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Applications and Related Industries

Electronics: Tantalum foils are crucial for manufacturing capacitors, sputtering targets, and thin-film coatings.

Aerospace: Strips and foils are used in heat shields and high-temperature components.

Chemical Industry: Used as liners in reactors and tanks to resist corrosive environments.

Medical Industry: Ideal for biocompatible implants and surgical instruments.

Energy Sector: Used in nuclear reactors and fuel cells due to its resistance to neutron absorption.

 

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Interesting Facts

Tantalum foil is used in the aerospace industry for high-temperature applications where thermal expansion is a concern.

The extreme ductility of tantalum allows it to be rolled into ultra-thin foils, making it suitable for precise and specialized applications.

Tantalum strips are often employed in superalloy production to enhance heat resistance and mechanical strength.

 

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Synonyms

Tantalum Thin Foil

Tantalum Ribbon

Tantalum Strips

 

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Health & Safety Information

Toxicity: Non-toxic in its metallic form but handle tantalum dust with care as it may pose inhalation risks.

Handling Precautions: Use gloves and masks during machining and fabrication processes.

Storage Recommendations: Store in a clean, dry environment to prevent surface contamination.

 

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Tantalum Foil and Strip Specification

Condition: Annealed

Product Name	Thickness (mm)	Width (mm)	Length (mm)	Material	Standard	Purity
Tantalum Foil	0.01-0.07	30-200	>50	UNS R05200, UNS R05400	ASTM B708-98	≥99.95% or 99.99%
Tantalum Strip	0.01-0.03	1.0-1.5	Up to 50000	UNS R05200, UNS R05400	ASTM B708-98	≥99.95% or 99.99%

Chemical Composition

Element	C	O	N	H	Fe	Mo	Nb	Ni	Si	Ti	W
R05200 (%,Max)	0.01	0.015	0.01	0.0015	0.01	0.02	0.1	0.01	0.005	0.01	0.05
R05400 (%,Max)	0.01	0.03	0.01	0.0015	0.01	0.02	0.1	0.01	0.005	0.01	0.05

Mechanical Properties for Tantalum Rolling Products

R05200 & R05400	Annealed (Regular temper)
	Tensile strength Min, psi (MPa)	Yield strength min, psi (MPa)(2%)	Elongation min, % (1 inch gage length)
Thickness<0.060" (1.524mm)	30000 (207)	20000 (138)	20
Thickness≥0.060" (1.524mm)	25000 (172)	15000 (103)	30

Chemical Identifiers

Linear Formula	Ta
MDL Number	MFCD00011252
EC No.	231-135-5
Beilstein/Reaxys No.	N/A
Pubchem CID	23956
SMILES	[Ta]
InchI Identifier	InChI=1S/Ta
InchI Key	GUVRBAGPIYLISA-UHFFFAOYSA-N

Tantalum Foil and Strip Properties (Theoretical)

Molecular Weight	180.94
Appearance	Silvery-gray solid
Melting Point	3017 °C
Boiling Point	5458 °C
Density	16.69 g/cm3 (20 °C)
Solubility in H2O	N/A
Crystal Phase / Structure	α: body-centered cubic (bcc) / β: tetragonal
Electrical Resistivity	131 nΩ·m (20 °C)
Electronegativity	1.5 Paulings
Heat of Fusion	36.57 kJ/mol
Heat of Vaporization	753 kJ/mol
Poisson's Ratio	0.34
Specific Heat	140 J/kg·K
Thermal Conductivity	57.5 W/m·K
Thermal Expansion	6.3 µm/m·K
Vickers Hardness	870–1200 MPa
Young's Modulus	186 GPa

 

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