ASTM B393-09e1

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Designation:B393 −09
Standard Specification for
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Niobium and Niobium Alloy Strip, Sheet, and Plate
This standard is issued under the fixed designation B393; 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.
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ε NOTE—Editorial corrections were made throughout in January 2010.
1. Scope E29Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
1.1 This specification covers five grades of wrought nio-
E2626Guide for Spectrometric Analysis of Reactive and
bium and niobium alloy strip, sheet, and plate as follows:
Refractory Metals
1.1.1 R04200-Type 1—Reactor grade unalloyed niobium,
1.1.2 R04210-Type 2—Commercial grade unalloyed
3. Terminology
niobium,
3.1 Definitions of Terms Specific to This Standard:
1.1.3 R04251-Type 3—Reactorgradeniobiumalloycontain-
3.1.1 lot, n—alotshallconsistofallmaterialproducedfrom
ing 1% zirconium, and
the same ingot at one time, with the same cross section,
1.1.4 R04261-Type 4—Commercial grade niobium alloy
processed with the same nominal metallurgical parameters and
containing 1% zirconium.
heat treated at the same conditions.
1.1.5 R04220-Type 5—RRR grade pure niobium.
3.1.2 plate, n—a flat product 6 in. (152.4 mm) or more in
NOTE1—Thisgradeofniobiumisusedinsuperconductingapplications
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width and greater than ⁄16 in. (4.76 mm) in thickness.
that require the ultra high purity. Because of the high purity the product is
conducive to very large grains that can adversely affect formability. It is 3.1.3 sheet, n—a flat product 6 in. (152.4 mm) or more in
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not recommended for other applications.
width and from 0.005 in. (0.13 mm) to ⁄16 in. (4.76 mm) in
thickness.
1.2 Except for dimensional tolerances in Table 1, the values
stated in inch-pound units are to be regarded as standard. The
3.1.4 strip, n—aflatproduct,whichmaybesuppliedincoil,
valuesgiveninparenthesesaremathematicalconversionstoSI
less than 6 in. (152.4 mm) in width and from 0.005 in. (0.13
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units that are provided for information only and are not
mm) to ⁄16 in. (4.76 mm) in thickness.
considered standard.
4. Ordering Information
1.3 The following precautionary caveat pertains only to the
4.1 Orders for materials under this specification shall in-
test methods portion of this specification. This standard does
clude the following information as applicable:
not purport to address all of the safety concerns, if any,
4.1.1 Type and grade (Section 1),
associated with its use. It is the responsibility of the user of this
4.1.2 ASTM designation and year of issue,
standard to establish appropriate safety and health practices
4.1.3 Quantityinweight,numberofpieces,anddimensions,
and determine the applicability of regulatory limitations prior
4.1.4 Chemistry (6.3),
to use.
4.1.5 Temper designation (Section 8),
2. Referenced Documents
4.1.6 Permissible overshipment (9.3),
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4.1.7 Quality and finish (10.3),
2.1 ASTM Standards:
4.1.8 Sampling (11.2),
B391Specification for Niobium and Niobium Alloy Ingots
4.1.9 Inspection (Section 15),
E8Test Methods for Tension Testing of Metallic Materials
4.1.10 Required reports (Section 17),
4.1.11 Marking (Section 18), and
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This specification is under the jurisdiction of ASTM Committee B10 on
4.1.12 Additions to the specification and supplementary
Reactive and Refractory Metals and Alloys and is the direct responsibility of
requirements, as required.
Subcommittee B10.03 on Niobium and Tantalum.
Current edition approved Oct. 1, 2009. Published December 2009. Originally
5. Materials and Manufacture
approved in 1999. Last previous edition approved in 2005 as B393– 05. DOI:
10.1520/B0393-09E01.
5.1 Material covered by this specification shall be made
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
from ingots that conform to Specification B391 and that are
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
produced by vacuum or plasma arc melting, vacuum electron-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. beam melting, or a combination of these three methods.
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B393−09
TABLE 1 Dimensional Tolerances for Niobium Flat-Rolled Products
A B
Tolerance on Thickness plus or Tolerance on Width (slit) plus or
Tolerance on Sheared Lengths, in. (mm)
minus, in. (mm) in lower table minus, in.(mm) in lower table
Thickness of Material,
Length 12 in. or 304.8 mm
Width6to24in. Width6to24in.
in. (mm) in lower table
...