MIL-STD-202H.pdf - 第161页
MI L - S TD - 202 - 20 9 5.2 Summary . T he foll ow i ng det ai l s ar e t o be s p ec i f i ed i n t h e i nd i v i dua l s pec i f i c at i on: a . Required radiog r aphi c q ual i t y ( s ee 4 .1 .1 and 5 .1 ). b . I …
MIL-STD-202-209
4.4. Procedure.
4.5 Positioning of specimen. The leaded film holder is backed up by the lead plate (see 4.1.2), and the specimen
to be radiographed shall be placed in the position or positions specified in the individual specification.
4.6 Exposure parameters. The following exposure parameters may be varied to obtain the radiographic quality
specified in 4.1.1:
a. Source - film distance.
b. Kilovoltage or type of isotope.
c. Milliamperage or source strength of isotope.
d. Exposure time.
e. Film speed.
f. Intensifying screen.
The detail sensitivity is affected by the following:
a. Focal spot size.
b. Film grain size.
c. Nature of the specimen.
d. Placement of the specimen.
The above factors should be taken into consideration when determining the exposure parameters.
4.7 Intensifying screens. In general, metallic intensifying screens should be used at X-ray tube voltages above 125
kilovolts to minimize fogging and for intensifying effects.
4.8 Identification of radiographs. Suitable means shall be employed to identify individual specimens on the
radiographic record.
4.9 Marking of radiographed specimens. If required, suitable marking shall be specified in the individual
specification indicating that specimens have been inspected radiographically.
5. DETAILED REQUIREMENTS
5.1 Evaluations. The final image shall be examined with suitable viewing equipment, which may include
magnification, to determine such defects as improper positioning of elements, voids in encapsulating or potting
compounds; inhomogeneities in materials; presence of foreign materials; broken elements; and other defects as
specified in the individual specification.
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MIL-STD-202-209
5.2 Summary. The following details are to be specified in the individual specification:
a. Required radiographic quality (see 4.1.1 and 5.1).
b. Image-quality indicator to be used (see 4.1.3).
c. Records, if required for nonfilm techniques (see 4.2).
d. Position or positions of specimen (see 4.5).
e. Marking indicating that specimens have been radiographed, if required (see 4.9).
f. Evaluation of images (see 5.1).
(1) Specific kind of viewing equipment, if required.
(2) Magnification, if required.
(3) Defects to be sought in the specimen.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Supersession data. The main body and 38 parts of this revision of MIL-STD-202 replace superseded MIL-STD-
202.
Custodians: Preparing activity:
Army - CR DLA – CC
Navy - EC
Air Force - 85 (Project 59GP-2015-023)
DLA - CC
Review activities:
Army - AR, AT, AV, CR4, MI, SM, TE
Navy - AS, OS, SH
Air Force - 19, 99
NSA - NS
NOTE: The activities listed above were interested in this document as of the date of this document. Since
organizations and responsibilities can change, you should verify the currency of the information above using the
ASSIST Online database at https://assist.dla.mil/
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北测（上海）电子科技有限公司
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INCH-POUND
MIL-STD-202-210
18 April 2015
SUPERSEDING
MIL-STD-202G
w/CHANGE 2 (IN PART)
28 June 2013
(see 6.1)
DEPARTMENT OF DEFENSE
TEST METHOD STANDARD
METHOD 210, RESISTANCE TO SOLDERING HEAT
AMSC N/A FSC 59GP
北测（上海）电子科技有限公司
联系方式：xuyj@beice-sh.com 13917165676