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ASTM International - ASTM B391-18

Standard Specification for Niobium and Niobium Alloy Ingots

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Organization: ASTM International
Publication Date: 1 April 2018
Status: active
Page Count: 3
significance And Use:

10.1 For the purpose of determining compliance with the specified limits for requirements of the properties listed in the following tables, an observed value or a calculated value shall be rounded... View More

scope:

1.1 This specification covers unalloyed and alloyed niobium ingots prepared by vacuum- or plasma-arc melting or electron-beam melting to produce consolidated metal for processing to various mill shapes.

1.2 The materials covered by this specification are:

1.2.1 R04200-Type 1-Reactor grade unalloyed niobium,

1.2.2 R04210-Type 2-Commercial grade unalloyed niobium,

1.2.3 R04251-Type 3-Reactor grade niobium alloy containing 1 % zirconium, and

1.2.4 R04261-Type 4-Commercial grade niobium alloy containing 1 % zirconium.

1.3 Unless a single unit is used, 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.

1.4 The following precautionary caveat pertains only to the test method portions of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5 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.

abstract:

This specification covers unalloyed and alloyed niobium ingots prepared by vacuum- or plasma-arc melting or electron-beam melting to produce consolidated metal for processing to various mill... View More

Document History

ASTM B391-18
April 1, 2018
Standard Specification for Niobium and Niobium Alloy Ingots
1.1 This specification covers unalloyed and alloyed niobium ingots prepared by vacuum- or plasma-arc melting or electron-beam melting to produce consolidated metal for processing to various mill...
October 1, 2009
Standard Specification for Niobium and Niobium Alloy Ingots (Withdrawn 2018)
1.1 This specification covers unalloyed and alloyed niobium ingots prepared by vacuum- or plasma-arc melting or electron-beam melting to produce consolidated metal for processing to various mill...
October 1, 2009
Standard Specification for Niobium and Niobium Alloy Ingots
1.1 This specification covers unalloyed and alloyed niobium ingots prepared by vacuum- or plasma-arc melting or electron-beam melting to produce consolidated metal for processing to various mill...
May 10, 2003
Standard Specification for Niobium and Niobium Alloy Ingots
1.1 This specification covers unalloyed and alloyed niobium ingots prepared by vacuum- or plasma-arc melting or electron-beam melting to produce consolidated metal for processing to various mill...
November 10, 1999
Standard Specification for Niobium and Niobium Alloy Ingots
1.1 This specification covers unalloyed and alloyed niobium ingots prepared by vacuum- or plasma-arc melting or electron-beam melting to produce consolidated metal for processing to various mill...
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