What are the tantalum grades and tantalum product standards?

What are the grades of tantalum?

Tantalum grades are usually set based on its chemical composition and properties. The following are some common grades of pure tantalum and tantalum alloys:

Pure Tantalum:

R05200: This is electronic grade pure tantalum with higher purity.
R05400: This is pure tantalum for industrial use.
Tantalum alloy:

Ta-2.5W (R05252): Tantalum alloy containing 2.5% tungsten, commonly used in high-temperature applications.
Ta-10W (R05255): Tantalum alloy containing 10% tungsten, with good high-temperature strength and corrosion resistance.
Ta-40Nb (R05240): Tantalum alloy containing 40% niobium, used in high-temperature and corrosive environments.
These grades are usually named according to the United States Unified Numbering System (UNS), other countries or regions may use different standards. When selecting a tantalum material, it is best to refer to the appropriate standards and specifications to ensure it meets the requirements of your specific application.

Standards for tantalum products such as tantalum wire, tantalum rods, tantalum plates, tantalum foils, and tantalum grounding rings are usually set by different international, national, or industry organizations. The following are some common standards covering tantalum products:
1. ASTM standard:

ASTM B365: Covers standard specifications for tantalum and tantalum alloy wire, rod, and shapes.
ASTM B708: Includes requirements for tantalum and tantalum alloy plates, sheets, and foils.
2. AMS specifications:

AMS 7849: Specifies pure tantalum and tantalum alloys for high-temperature applications.
AMS 4902: Requirements for Tantalum and Tantalum Alloy Sheets and Foils for Industrial Use.

3. ISO standards:

ISO 13782: Covers metallic materials used in medical implants, including tantalum.
4. MIL specifications:

MIL-T-81556: Specifies requirements for tantalum and tantalum alloys in aerospace applications.
5. National standards:

Different countries may have their national standards, such as Chinese National Standards (GB) or European Standards (EN).