ASTM B521-98 To5200 Pure Seamless Tantalum Tubes Annealed

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Tantalum thermowells are often used to protect thermocouples when monitoring the temperature of highly corrosive chemical solutions and agents. 

Material: pure tantalum, tantalum alloy

Standard Specification ASTM B 521 -98 for Tantalum Tube + Tantalum Alloy Tube Seamless and Welded.This specification covers tantalum and tantalum alloy seamless and welded tubes of the following grades:  

1. ASTM B 521 -98 UNS R05200, unalloyed tantalum, vacuum melt;  
2. ASTM B 521 -98 UNS R05200, unalloyed tantalum, powder-metallugry consolidation;  
3. ASTM B 521 -98 UNS R05255, tantalum alloy, 90% tantalum 10% tungsten alloy, vacuum melted;  
4. ASTM B 521 -98 UNS R05252, tantalum alloy, 97.5% tantalum 2.5% tungsten alloy, vacuum melted;  
5. ASTM B 521 -98 UNS R05240, tantalum alloy, 60% tantalum 40% columbium, electron-beam furnace or vacuum-arc melt.

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