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1.
Scope
1.1 Scope. This specification establishes the
requirements for niobium alloy plates, sheets and strip.
1.2 Classification. Niobium alloy plates, sheet,
and strip procured to this specification shall be supplied
in the following types:
| Type |
Composition |
| Nb |
Nb |
| C-103 |
Nb-lOHf-1Ti |
| C-129Y |
Nb-lOHf-1OW-.1Y |
| Nb1Zr |
Nb-1Zr |
| Cb-752 |
Nb- 1OW-2.5Zr |
2.
Applicable Documents
The
following documents of the issue in effect on the date
of invitation for bids or request for proposal form
a part of this specification to the extent specified
herein.
STANDARDS
- Federal
- Federal Test Method Standard No.151. MIL-STD-271.
Metals, Test Methods, Non-Destructive Testing (X-Ray,
Sonics, Dye Penetrant)
- American
Society for Testing Materials. ASTM E-12. Methods
for Determining Average Grain Size
- National
Academy of Science, Material Advisory Board, MAB-216-M.
Evaluation Test Methods for Refractory Metal Sheet
Material
- Aeronautical
Material Specifications. AMS 2242. Tolerance
3.
Requirements
3.1
Materials
3.1.1
Production Methods. The ingot metal shall be double
vacuum melted in a furnace of a type suited for reactive
metals.
3.1.2 Alloy Identification. The identity of all
alloys with respect to ingot melt number shall be maintained
at all stages of fabrication.
3.1.3 Condition. Unless otherwise specified,
all material shall be supplied in the recrystallization
annealed condition in accordance with Table 1.
Table
1
| Thickness
|
% Recrystallization
|
|
Nb* |
C-103 |
C-129Y |
Nb-1 Zr |
Cb-752 |
| Less
than .005 |
A/W |
A/W |
A/W |
A/W |
A/W |
| .005-.150 |
80 |
95-100% |
95-100% |
95-100% |
95-100% |
| .151-250 |
75 |
90-100% |
90-100% |
90-100% |
90-100% |
| .251-1.00 |
50 |
85-100% |
85-100% |
85-100% |
85-100% |
*Material
supplied in the As Worked (A/W) condition unless otherwise
specified.
Page
24 of 34 Next
INDEX •
CORROSION RESISTANCE
PROPERTIES • FABRICATION
NIOBIUM
PRODUCTS • SPECIFICATIONS
of NIOBIUM
NIOBIUM ELECTRONICS APPLICATIONS
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