| ASTM B521-22 - 1.4.2022 | ||
| 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. | ||
| 1. Scope | ||
1.1?This specification covers tantalum and tantalum alloy seamless and welded tubes of the following grades: 1.1.1?UNS Grade R05400Unalloyed tantalum, powder-metallurgy consolidation, 1.1.2?UNS Grade R05200Unalloyed tantalum, vacuum melted, 1.1.3?UNS Grade R05252Tantalum + 2.5 % tungsten alloy, vacuum melted. 1.1.4?UNS Grade R05255Tantalum + 10 % tungsten alloy, vacuum melted. 1.1.5?UNS Grade R05240Tantalum 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. | ||
| 2. Referenced Documents | ||
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