ASTM B521-12

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 or 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.

General Information

• Status: Historical
• Publication Date: 30-Nov-2012
• ICS: 77.150.99 - Other products of non-ferrous metals
• Technical Committee: B10 - Reactive and Refractory Metals and Alloys
• Drafting Committee: B10.03 - Niobium, Tantalum, and Vanadium

Relations

• Replaces: ASTM B521-98(2004) - Standard Specification for Tantalum and Tantalum Alloy Seamless and Welded Tubes
• Effective Date: 01-Dec-2012

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:B521 −12
Standard Specification for
1
Tantalum and Tantalum Alloy Seamless and Welded Tubes
This standard is issued under the fixed designation B521; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Ordering Information
1.1 This specification covers tantalum and tantalum alloy 4.1 Ordersformaterialunderthisspecificationshallinclude
seamless and welded tubes of the following grades: the following information:
1.1.1 UNS Grade R05400—Unalloyed tantalum, powder- 4.1.1 Quantity,
metallurgy consolidation, 4.1.2 UNS grade,
1.1.2 UNS Grade R05200—Unalloyed tantalum, vacuum 4.1.3 Type (welded or seamless),
melted, 4.1.4 Dimensions,
1.1.3 UNS Grade R05252—Tantalum + 2.5 % tungsten 4.1.5 Nondestructive test requirements, if any, and
alloy, vacuum melted. 4.1.6 Additions to the specification and supplementary
1.1.4 UNS Grade R05255—Tantalum + 10 % tungsten requirements, if any.
alloy, vacuum melted.
5. Materials and Manufacture
1.1.5 UNS Grade R05240—Tantalum alloy, 60% tantalum,
40% niobium, electron-beam furnace or vacuum arc melt, or
5.1 Seamless tube shall be made by any seamless method
both.
that will yield a product meeting the requirements of this
specification.
1.2 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
5.2 Welded tube shall be made from flat-rolled product by
conversions to SI units that are provided for information only
an automatic or semiautomatic fusion welding process with no
and are not considered standard.
addition of filler metal.
6. Chemical Composition
2. Referenced Documents
2
6.1 The material shall conform to the requirements of
2.1 ASTM Standards:
E29Practice for Using Significant Digits in Test Data to chemical composition prescribed in Table 1.
6.1.1 Analysis for elements not listed in Table 1 and not
Determine Conformance with Specifications
normally expected in tantalum shall not be required unless
3. Terminology
specified at time of purchase.
3.1 Definitions of Terms Specific to This Standard:
6.2 The manufacturer’s ingot analysis shall be considered
3.1.1 lot—all material produced from the same ingot or
the chemical analysis for products supplied under this specifi-
single powder blend, of the same size and last annealed in the
cation.
same furnace charge.
6.3 Whenrequestedbythepurchaseratthetimeofpurchase
3.1.2 process length—the one-piece length of each tube that
the manufacturer shall report the values of the interstitial
results from the production operation that first yields the
elements carbon, oxygen, hydrogen, and nitrogen as specified
tubular form. Sampling and testing should in general be based
in Table 1 for each lot of finished product.
on process lengths unless specifically stated otherwise.
7. Mechanical Properties
7.1 Tensile—The tensile properties of the finished tube
1
This specification is under the jurisdiction of ASTM Committee B10 on
material shall conform to the requirements of Table 2.
Reactive and Refractory Metals and Alloysand is the direct responsibility of
Subcommittee B10.03 on Niobium and Tantalum.
7.2 Flare—Asectionofthefinishedtubeshallbecapableof
Current edition approved Dec. 1, 2012. Published January 2013. Originally
being flared without cracking visibly to the unaided eye. The
approved in 1970. Last previous edition approved in 2004 as B521–98 (2004).
flareshallbemadewithatoolhavinga60°includedangleuntil
DOI: 10.1520/B0521-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or the outside diameter has been increased 20%.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
7.3 Reverse Flattening—Asectionofweldedtubethatisslit
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. longitudinally 90° either side of the weld shall be opened and
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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B521−12
TABLE 1 Ingot Chemical Requirements
(Composition, max weight %)
Element
R05200 R05400 R05252 R05255 R05240
O 0.015 0.030 0.015 0.015 0.020
N 0.010 0.010 0.010 0.010 0.010
C 0.010 0.010 0.010 0.010 0.010
H 0.0015 0.0015 0.0015 0.0015 0.0015
Nb 0.10 0.10 0.50 0.10 35.0–42.0
Mo 0.020 0.020 0.020 0.020 0.020
W 0.050 0.050 2.0–3.5 9.0–11.0 0.050
Ti 0.010 0.010 0.010 0.010 0.010
Si 0.005 0.005 0.005 0.005 0.005
Fe 0.010 0.010 0.010 0.010 0.010
Ni 0.010 0.010 0.010 0.010 0.010
Ta remainder remainder remainder remainder remainder
TABLE 2 Mechanical Requirements
R05200/R05400
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: B521 − 98 (Reapproved 2004) B521 − 12
Standard Specification for
1
Tantalum and Tantalum Alloy Seamless and Welded Tubes
This standard is issued under the fixed designation B521; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. 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 % columbium,niobium, electron-beam furnace or vacuum arc
melt, or both.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information
only.mathematical conversions to SI units that are provided for information only and are not considered standard.
2. Referenced Documents
2
2.1 ASTM Standards:
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 lot—all material produced from the same ingot or single powder blend, of the same size and last annealed in the same
furnace charge.
3.1.2 process length—the one-piece length of each tube that results from the production operation that first yields the tubular
form. Sampling and testing should in general be based on process lengths unless specifically stated otherwise.
4. Ordering Information
4.1 Orders for material under this specification shall include the following information:
4.1.1 Quantity,
4.1.2 UNS grade,
4.1.3 Type (welded or seamless),
4.1.4 Dimensions,
4.1.5 Nondestructive test requirements, if any, and
4.1.6 Additions to the specification and supplementary requirements, if any.
5. Materials and Manufacture
5.1 Seamless tube shall be made by any seamless method that will yield a product meeting the requirements of this specification.
5.2 Welded tube shall be made from flat-rolled product by an automatic or semiautomatic fusion welding process with no
addition of filler metal.
1
This specification is under the jurisdiction of ASTM Committee B10 on Reactive and Refractory Metals and Alloysand is the direct responsibility of Subcommittee
B10.03 on Niobium and Tantalum.
Current edition approved May 1, 2004Dec. 1, 2012. Published May 2004January 2013. Originally approved in 1970. Last previous edition approved in 19982004 as
B521 – 98.B521 – 98 (2004). DOI: 10.1520/B0521-98R04.10.1520/B0521-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B521 − 12
6. Chemical Composition
6.1 The material shall conform to the requirements of chemical composition prescribed in Table 1.
6.1.1 Analysis for elements not listed in Table 1 and not normally expected in tantalum shall not be required unless specified
at time of purchase.
6.2 The manufacturer’s ingot analysis shall be considered the chemical analysis for products supplied under this specification.
6.3 When requested by the purchaser at the time of purchase the manufacturer shall report the values of the interstitial elements
carbon, oxygen, hydrogen, and nitrogen as specified in Table 21 for each lot of finished product.
7. Mechanical Properties
7.1 Tensile—The tensile properties of the finished tube material shall conform to the requirements of Table 32.
7.2 Flare—A section of the finished tube shall be capable of being flared without cracking visibly to the unaided eye. The flare
shall be made with a tool having a 60° included angle until the outside diameter has been increased 20 %.
7.3 Reverse Flattening—A section of welded tube that is slit longitudinally 90° either side of the weld shall be opened and
flattened with the weld at the point of maximum bend. No cracking is permitted.
7.4 One set of these mechanical tests shall
...