ASTM B393-03
(Specification)Standard Specification for Niobium and Niobium Alloy Strip, Sheet, and Plate
Standard Specification for Niobium and Niobium Alloy Strip, Sheet, and Plate
SCOPE
1.1 This specification covers four grades of wrought niobium and niobium alloy strip, sheet, and plate as follows: Note 1—Committee B10 has adopted "niobium" as the designation for Element No. 41, formerly named "columbium."
1.1.1 R04200-Type 1 Reactor grade unalloyed niobium,
1.1.2 R04210-Type 2 Commercial grade unalloyed niobium,
1.1.3 R04251-Type 3 Reactor grade niobium alloy containing 1 % zirconium, and
1.1.4 R04261-Type 4 Commercial grade niobium alloy containing 1 % zirconium.
1.2 Except for dimensional tolerances in , the values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 The following precautionary caveat pertains only to the test methods portion 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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: B 393 – 03
Standard Specification for
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Niobium and Niobium Alloy Strip, Sheet, and Plate
This standard is issued under the fixed designation B 393; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.1 lot—a lot shall consist of all material produced from
the same ingot at one time, with the same cross section,
1.1 This specification covers four grades of wrought nio-
processed with the same nominal metallurgical parameters and
bium and niobium alloy strip, sheet, and plate as follows:
heat treated at the same conditions.
NOTE 1—Committee B10 has adopted “niobium” as the designation for
3.1.2 plate—a flat product 6 in. (152.4 mm) or more in
Element No. 41, formerly named “columbium.”
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width and greater than ⁄16 in. (4.76 mm) in thickness.
1.1.1 R04200-Type 1—Reactor grade unalloyed niobium,
3.1.3 sheet—a flat product 6 in. (152.4 mm) or more in
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1.1.2 R04210-Type 2—Commercial grade unalloyed nio-
width and from 0.005 in. (0.13 mm) to ⁄16 in. (4.76 mm) in
bium,
thickness.
1.1.3 R04251-Type 3—Reactor grade niobium alloy con-
3.1.4 strip—a flat product, which may be supplied in coil,
taining 1 % zirconium, and
less than 6 in. (152.4 mm) in width and from 0.005 in. (0.13
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1.1.4 R04261-Type 4—Commercial grade niobium alloy
mm) to ⁄16 in. (4.76 mm) in thickness.
containing 1 % zirconium.
4. Ordering Information
1.2 Except for dimensional tolerances in Table 1, the values
stated in inch-pound units are to be regarded as the standard.
4.1 Orders for materials under this specification shall in-
The values given in parentheses are for information only.
clude the following information as applicable:
1.3 The following precautionary caveat pertains only to the
4.1.1 Type and grade (Section 1),
test methods portion of this specification. This standard does
4.1.2 ASTM designation and year of issue,
not purport to address all of the safety concerns, if any,
4.1.3 Quantityinweight,numberofpieces,anddimensions,
associated with its use. It is the responsibility of the user of this
4.1.4 Chemistry (6.3),
standard to establish appropriate safety and health practices
4.1.5 Temper designation (Section 8),
and determine the applicability of regulatory limitations prior
4.1.6 Permissible overshipment (9.3),
to use.
4.1.7 Quality and finish (10.3),
4.1.8 Sampling (11.2),
2. Referenced Documents
4.1.9 Inspection (Section 15),
2.1 ASTM Standards:
4.1.10 Required reports (Section 17),
B 391 Specification for Niobium and Niobium Alloy In-
4.1.11 Marking (Section 18), and
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gots
4.1.12 Additions to the specification and supplementary
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E 8 Test Methods forTensionTesting of Metallic Materials
requirements, as required.
E 29 Practice for Using Significant Digits in Test Data to
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5. Materials and Manufacture
Determine Conformance with Specifications
5.1 Material covered by this specification shall be made
3. Terminology
from ingots that conform to Specification B 391 and that are
3.1 Definitions of Terms Specific to This Standard:
produced by vacuum or plasma arc melting, vacuum electron-
beam melting, or a combination of these three methods.
5.2 The various niobium mill products covered by this
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This specification is under the jurisdiction of ASTM Committee B10 on
specification are formed with the conventional extrusion,
Reactive and Refractory Metals and Alloys and is the direct responsibility of
forging, swaging, rolling, and drawing equipment normally
Subcommittee B10.03 on Niobium and Tantalum.
Current edition approved Sept. 10, 2003. Published September 2003. Originally
available in metal working plants.
approved in 1999. Last previous edition approved in 1999 as B 393 - 99.
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Annual Book of ASTM Standards, Vol 02.04.
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Annual Book of ASTM Standards, Vol 03.01.
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Annual Book of ASTM Standards, Vol 14.02.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B393–03
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 Length over 12 in. or 304.8 mm
Width under 6 in. Width under 6 in.
and under
or 152.4 to or 152.4 to
or 152.4 mm or 152.4 mm
609.6 mm 609.6 mm
Plus Minus Plus Minus
Inches
1 3
0.005 to 0.010 excl 0.0005 0.001 0.012 . ⁄16 0 ⁄32 0
1 3
0.010 to 0.015 excl 0.0007 0.001 0.015 0.015 ⁄16 0 ⁄32 0
1 3
0.015 to 0.0
...
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