When nickel, titanium or zirconium alloys are not enough...

• Immune to numerous acids and chemicals (corrosion tables)
• Better corrosion resistance than nickel alloys, titanium or zirconium
• High strength and stiffness in vacuum and inert gas up to 2000°C (3600°F)
• Can become brittle when used in oxygen above 300°C
• High purity and biocompatibilty
• Physical Properties
• Tantalum socket head cap screw features and benefits
• Tantalum grades, specifications and chemistry
• Datasheet for tantalum

Tantalum socket head cap screws are best known for its unmatched corrosion resistance and chemical inertness. Tantalum screws have a similar corrosion resistance to that of glass, but all of the typical mechanical and electrical properties of a metal.

Tantalum socket head cap screws are also extremely stable at high temperatures, since tantalum has a melting point around 3000°C. High temperature applications require vaccum or inert gas since tantalum may embrittle when used in oxygen rich environments above 250°C.  Tantalum socket head cap screws are also one of the most bio-compatible metals available and is also radio-opaque due to its high density (16.68 g/cm3).

All tantalum socket head cap screws are available in commercially pure tantalum and tantalum 2.5% tungsten (Ta-2.5%W).

Contact us to see if your required tantalum socket head cap screws are in stock and how our engineers may help you with your tantalum fastener application.

Resources: Tantalum Torque Spec

Screw Types: Button Head Cap Screws, Flat Head Screws, Hex Cap Screws, Pan Head Screws, Set Screws, Socket Head Cap Screws, Tamper Resistant Security Screws,

Tantalum Socket Head Cap Screw Features and Benefits

When it comes to tantalum socket head cap screws, it’s all about clearance. These screws are the best choice for applications with limited installation access or clearance. Yet if you have an application with a lot of debris, you may want to select a tantalum hex head bolt or hex head cap screw, as they don’t have a socket drive which could get clogged.

Advantages:

• Ideal for applications with limited access as they require very little clearance around the fastener.
• Socket head cap screws can be used in locations where externally wrenched fasteners aren't desirable.
• Weight reduction on application as tantalum socket head cap screws are smaller – being that the cylindrical heads of socket screws need less space than hex heads and require no additional wrench space.
• Also known for safety, reliability and economy.

Tantalum Grades, Specifications and Chemistry

Tantalum (Commercially Pure)

Commercially pure tantalum metal is 99.95% pure tantalum has some o the best corrosion resistant properties of any metal. While its corrosion resistance is exceptional, it is relatively soft and mechanically similar in strength to copper.

Tantalum Specifications: UNS R05200, ASTM B521, B708

Tantalum 2.5% Tungsten (Ta-2.5W)

This grade of tantalum alloyed with 2.5% tungsten provided better overall strength while maintaining its exception corrosion resistant properties. For tantalum fastener applications this is usually preferred.

Tantalum 2.5% Tungsten Specifications: UNS R05252, ASTM B521, B708

Physical Properties

• Density 16.6 g/cc
• Melting Point 3290 K, 2996°C, 5462°F
• Boiling Point 5731 K, 6100°C, 9856°F
• Coefficient of Thermal Expansion (20°C) 6.5 x 10(-6) / °C
• Electrical Resistivity (20°C) 13.5 microhms-cm
• Electrical Conductivity 13% IACS
• Specific Heat .036 cal/g/°C
• Thermal Conductivity .13 cal/cm(2)/cm°C/sec

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Tantalum Tensile Data

Tantalum Iso-Corrosion Curves

Tantalum Corrosion Resistance Table