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10.
Ultrasonic Examination
Each
finished bar or rod 1/2" diameter or larger, shall be
examined as follows:
10.1
All bar and rods 1/2" diameter or larger shall be examined
with ultrasonic test equipment calibrated with a flat
bottom hole standard. Discontinuities producing indications
with an amplitude equal to or greater than that produced
in the reference hole shall be cause for rejection.
10.2
Circumferential Angle-Beam Examination. Each finished
bar or rod shall be examined by circumferential angle-beam
examination. This examination shall be performed by
relating the angle-beam ultrasonic inspection procedures
described in ASTM A-388 to solid bars or rods. For bars
and rods the ultrasonic equipment shall be calibrated
using a standard containing the following diameter hole
drilled to a depth of 1/2 to 3/4 inch into the end of
the standard parallel to the axis and a distance one-fourth
of the diameter from the axis.
| Rod Diameter,
inch |
Hole Diameter in Standard,
inch |
| 5/8 and less |
0.013 |
| greater than 5/8
to 2 |
3% of product diameter or 0.032
inch, whichever is smaller |
The
ultrasonic equipment shall also be calibrated for all
bars using standards containing a notch which has the
following depth and is no longer than 1/4 inch cut parallel
to the longitudinal axis.
| Rod Diameter;
inch |
Notch Depth, inch |
| 1/2 to 2 |
1% of product diameter |
Discontinuities
producing indications with an amplitude equal to or
greater than that produced in the reference or notch
shall be cause for rejection or rework.
11.
High Homogeneity Material
High
homogeneity niobium-titanium alloys are available upon
request. The degree of homogeneity will be determined
by x-ray comparison to mutually approved standards.
When specified, an x-ray positive(s) will be provided
with the certification.
12.
Conflicts
Where
any of the above standards or specifications appear
to be in conflict with the requirements of another reference
document, such conflict shall be brought to the attention
of the Purchaser for resolution.
Page
31 of 34 Next
INDEX •
CORROSION RESISTANCE
PROPERTIES • FABRICATION
NIOBIUM
PRODUCTS • SPECIFICATIONS
of NIOBIUM
NIOBIUM ELECTRONICS APPLICATIONS
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