Standard Specification for Tantalum and Tantalum Alloy Seamless and Welded Tubes
Standard Specification for Tantalum and Tantalum Alloy Seamless and Welded Tubes
ABSTRACT This specification covers tantalum and tantalum alloy seamless and welded tubes of the following grades: UNS Grade R05400 which is unalloyed tantalum, powder-metallurgy consolidation, UNS Grade R05200 which is unalloyed tantalum, vacuum melted, UNS Grade R05252 which is tantalum with 2.5% tungsten alloy, vacuum melted, UNS Grade R05255 which is tantalum with 10% tungsten alloy, vacuum melted, and UNS Grade R05240 which is tantalum alloy with 60% tantalum, 40% columbium, electron-beam furnace or vacuum arc melted, or both. Seamless tube shall be made by any seamless method and the welded tube shall be made from flat-rolled product by an automatic or semiautomatic fusion welding process with no addition of filler metal. Mechanical properties such as ultimate tensile strength, yield strength, and elongation shall be determined by tensile, flare, and reverse flattening tests. Nondestructive tests such as hydrostatic test, pneumatic test, helium leak test, and ultrasonic test shall be done as well. SIGNIFICANCE AND USE 12.1 For the purpose of determining compliance with the specified limits of property requirements, an observed value or a calculated value shall be rounded in accordance with the rounding method of Practice E29. SCOPE 1.1 This specification covers tantalum and tantalum alloy seamless and welded tubes of the following grades: 1.1.1 UNS Grade R05400—Unalloyed tantalum, powder-metallurgy consolidation, 1.1.2 UNS Grade R05200—Unalloyed tantalum, vacuum melted, 1.1.3 UNS Grade R05252—Tantalum + 2.5 % tungsten alloy, vacuum melted. 1.1.4 UNS Grade R05255—Tantalum + 10 % tungsten alloy, vacuum melted. 1.1.5 UNS Grade R05240—Tantalum alloy, 60 % tantalum, 40 % niobium, electron-beam furnace, vacuum arc melt, or both. 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM B521-22 is the standard specification from ASTM International covering the requirements for tantalum and tantalum alloy seamless and welded tubes. This standard applies to tubes manufactured from several grades, including unalloyed tantalum and tantalum alloys with tungsten or niobium, employing various melting and consolidating processes. ASTM B521-22 details key aspects such as chemical composition, mechanical properties, allowable tolerances, tests, inspection, packaging, and marking, ensuring consistent quality and performance for tantalum tubing products used in critical applications.
Keywords: tantalum tubes, tantalum alloys, ASTM B521, seamless tubing, welded tubing, chemical composition, mechanical properties, inspection, non-destructive testing
Material Grades Covered
Tube Types
Key Requirements
Testing and Inspection
Другие стандарты ASTM
Tantalum and tantalum alloy tubing is valued for its exceptional corrosion resistance, high temperature stability, and bio-compatibility. Key industries and applications include:
The performance of these tubes, as defined under ASTM B521-22, supports operational safety and reliability in highly demanding environments.
ASTM B521-22 references and aligns with several other ASTM and industry documents for mutual compatibility and best practices:
By referencing these documents, ASTM B521-22 promotes international harmonization and reliable qualification of tantalum tubing for critical industrial applications.
For the latest version and full technical detail, always consult the official ASTM B521 standard.