MIL-STD-271 Revision F:1986

1. SCOPE
1.1 General
1.2 Classification
1.3 Acceptance standards
1.4 Time of inspection
1.5 General definitions
1.6 Nondestructive test personnel certification
1.7 Procedure qualification and approval
1.8 Maintenance of inspection records
2. APPLICABLE DOCUMENTS
2.1 Government documents
2.2 Other publications
2.3 Order of precedence
3. RADIOGRAPHY
3.1 Definitions
3.2 General requirements
3.3 Radiography requirements
3.4 Penetrameters
3.5 Shims
3.6 Radiographic quality levels
3.7 Single-wall and double-wall radiography
3.8 Radiography of parts
3.9 Radiography of repair welds
3.10 Radiography of castings and forgings
3.11 Radiographic film ownership
4. MAGNETIC PARTICLE TESTING
4.1 Intended use
4.2 Definitions
4.3 Magnetic particle inspection requirements
4.4 Non-relevant indications
4.5 Final cleaning
4.6 Arc strikes
5. LIQUID PENETRANT TESTING
5.1 Intended use
5.2 Definitions
5.3 Inspection methods
5.4 General requirements
5.5 Surface preparation
5.6 Test procedures
5.7 Test results
6. ULTRASONIC TESTING
6.1 Definitions
6.2 Procedure and test methods
6.3 Equipment
6.4 General requirements
6.5 Test methods
6.6 Thickness measurements
6.7 Bonding
7. EDDY CURRENT TESTING
7.1 Scope
7.2 Definitions
7.3 Eddy current inspection requirements
7.4 Equipment requirements
7.5 On-site verification/standardization
7.6 Test technique
8. VISUAL INSPECTION
8.1 Scope
8.2 Reference standard
8.3 Procedure requirements
8.4 Inspection techniques
8.5 Dimensional inspection accuracy
8.6 Lighting
9. NOTES
9.1 Subject term (key word) listing
9.2 Changes from previous issue
FIGURES
1. Recommended X-ray voltage settings and radioisotope
     sources to be used with various steel and
     similar alloys
2. Recommended X-ray voltage settings and radioisotope
     sources to be used with varius copper-base and
     similar alloys
3. Recommended X-ray voltage settings and radioisotope
     sources to be used with various aluminium,
     magnesium and similar alloys
4. Penetrameter designs
4a. Penetrameter identification notching
4b. Maximum allowed Ug
4c. Recommended increase in source-to-film distance
     for various radioisotope sources with lengths
     greater than 1/8 inch
5. Examples of material thickness (Tm) and specimen
     thickness (Ts)
6. Magnetic field indicator
7. Skip distance example
7a. Accepted scanning techniques for butt welds
8. Typical ultrasonic calibration plot for vertical
     linearity
9. Typical reference calibration standard
     (sensitivity)
10. Typical viewing screen calibration (butt welds)
     (with dB control)
11. Typical viewing screen calibration (butt welds)
     (without dB control)
12. Scanning procedures for welds
13. Scanning procedure for tee welds
14. Typical viewing screen calibration (tee welds)
     (with dB control)
15. Typical viewing screen calibration (tee welds)
     (without dB control)
16. Surface opposite attachment member accessible
17. Surface opposite attachment member not accessible
18. Recommended probe-to-weld attitude for eddy
     current standardization and scanning operations
TABLES
I. Examples of penetrameter identification
II. Penetrameter placement for welds
III. Allowable film-side penetrameters
IV. Definition of radiographic quality levels
V. Minimum radiographic quality levels for Iridium-
      192 radiography of nonstructural welds
VI. Calibration hole size for longitudinal test
VII. Calibration reference notch dimensions of square
      and "U" bottom notch

Covers non-destructive testing for determination of internal and surface discontinuities in metals.

This standard covers the requirements for conducting nondestructive tests used in determining the presence of surface and internal discontinuities in metals.