ASTM E428 PDF

Designation: E – 00 An American National Standard. Standard This practice covers a procedure for fabrication and ASTM Standards: control of. ASTM Distance-Amplitude #3, #5, #8 FBH Blocks (set of. 19). 9. EDM Notches . amplitude. Specifications: ASTM E, ASTM. E Calibration. Application. ASTM E – 00 – Standard Practice for Fabrication and Control of Steel Reference Blocks Used in.

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ASTM E428 – 08(2013)

A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval.

The reference blocks described are suitable for use with either the direct-contact method or immersion pulse-echo ultrasonic methods. Additional procedures and controls may be required when fabricating reference blocks from other than carbon or alloy steel material.

This practice shall in no way preclude the speci? This practice, however, must not be confused with, nor does it supersede Practice Especi? Unlike this practice, Practice E has requirements for evaluation relative to a speci?

Summary of Practice 4.

Additional supplemental requirements may be needed when using this practice to fabricate reference blocks from other types of materials or with larger diameter holes. The physical characteristics of the hole may be established by evaluating plastic replicas.

It must be recognized however that there are limitations on the size hole r428 may be replicated and evaluated.

The grain size, heat treat condition, physical and chemical composition, surface? It is the responsibility of the user of this standard to establish appro- 1 This practice is under the jurisdiction of ASTM Committee E07 on Nondestructive Testing and is the direct responsibility of Subcommittee E Current edition approved July 10, Originally published as E — Last previous edition E — The examination instruments, frequency, and search unit used in the evaluation of the raw material intended for the fabrication of the reference blocks shall be comparable to that used in the examination of the production material.

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In cases of materials that are acoustically transparent to the extent that this requirement cannot be satis? The acoustic noise level from the material is not to be confused with inherent electrical instrument noise often observed when the system sensitivity is adjusted to its maximum level range. With the amplitude from the? On samples that are to have FBHs smaller than 3?

At frequencies such as 5. Block sets conforming to customary commercial practice are grouped as follows: The following machining sequence is recommended: NOTE 2—This practice may be used to produce blocks with?

D—Hole diameter tolerance Due to possible edge build-up during the plating process, this tolerance applies only to the area exclusive of that within 1? G—Hole bottom must be? Careful attention must be given to the squareness of corners of the cutter, the slightest radius reduces the re? Checking Physical Characteristics 7. The replica shall indicate that the hole bottom is?

For record purposes, the replica may be projected on a comparator screen and photographed as shown in Fig. Checking Ultrasonic Response Characteristics 8. If the ultrasonic-response characteristics are to be established by immersion techniques, the drilled? It is recommended that blocks fabricated as sets be compared with each other to determine their relative ultrasonic-response characteristics. This is particularly desirable in the cases of sets containing?

Without changing any examination parameters, the ultrasonic response from the remaining blocks with both smaller and larger size re?

Without changing any test parameters, the ultrasonic response from the remaining blocks with both shorter and longer distances are plotted on the response curve. Under no circumstances may the FBH be altered to change the ultrasonicresponse characteristics of the reference block.

Therefore, consideration should be given to the operating characteristics of the search unit and instrument generally available from the equipment manufacturer when evaluating the response curves from the reference blocks. The curve may vary when the examination is performed at other frequencies with different diameter search units and different water path distances or if a contact test method is used.

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For example, the identi? Where several sets and types of blocks are being used, a serial number identi? Serial numbers are important when comparing sets of blocks to their respective response curves and to other sets of blocks. However, the coating must not signi? Generally, nickel plating to a maximum thickness of 0. The machined counterbore may be omitted if this plugging technique is used.

An adequate air gap must be maintained at the hole bottom. The curve may vary when the test is performed at other frequencies with different diameter search units and different water-path distances or if a contact test method is used.

Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

ASTM E – 00_百度文库

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.