MIL-STD-2175 Revision A:1993
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
CASTING, CLASSIFICATION AND INSPECTION OF
01-07-1998
1. SCOPE
1.1 Purpose
1.2 Applicability
1.2.1 Casting methods
1.2.2 Casting alloys
1.3 Classification
1.3.1 Classes
1.3.2 Grades
2. APPLICABLE DOCUMENTS
2.1 Government documents
2.1.1 Specifications and standards
2.2 Non-Government publications
2.3 Order of precedence
3. DEFINITIONS
3.1 Alloy
3.2 Casting
3.3 Chaplet
3.4 Cold shut
3.5 Contracting agency
3.6 Defect
3.7 Diffraction
3.8 Discontinuity
3.9 Foreign material
3.10 Gas holes
3.11 Gas porosity
3.12 Hot tear
3.13 Inclusions
3.14 Insert
3.15 Misruns
3.16 Penetrameter or image quality indicator (IQI)
3.17 Radiographic quality level
3.18 Segregation
3.19 Shrinkage
3.20 Shrinkage cavity
3.21 Surface irregularities
3.22 Visual inspection
4. GENERAL REQUIREMENTS
4.1 Personnel qualification
4.2 Inspection sequence
4.3 Discontinuity removal
4.4 Classification of castings
4.4.1 Determination of classes and grades
4.4.2 Class 1 casting requirements
4.5 Inspection lot
5. DETAIL REQUIREMENTS
5.1 Outline of inspections
5.1.1 Visual inspection
5.1.2 Magnetic particle and liquid penetrant
inspection
5.1.3 Radiographic inspection
5.2 Sampling
5.2.1 Visual inspection
5.2.2 Magnetic particle and liquid penetrant
inspection
5.2.3 Radiographic inspection
5.3 Inspection methods and acceptance criteria
5.3.1 Visual inspection
5.3.1.1 Surface roughness
5.3.1.2 Gate, riser and parting line projections
5.3.1.3 Surface pits and raised metal
5.3.2 Magnetic particle and liquid penetrant
inspection
5.3.2.1 Inspection method for ferromagnetic materials
5.3.2.2 Inspection method for non-ferromagnetic
materials
5.3.2.3 Magnetic particle and liquid penetrant
acceptance criteria
5.3.3 Radiographic inspection
5.3.3.1 Radiographic inspection method
5.3.3.2 Radiographic reference standards
5.3.3.3 Radiographic acceptance criteria
5.4 Re-inspection
5.4.1 Re-inspection of rejected lots
5.4.2 Individual casting rejection
6. NOTES
6.1 Intended use
6.2 Issue of DoDISS
6.3 Data requirements
6.4 Sampling
6.5 Cross-reference
6.6 Radiographic quality grades for machined
6.7 Producibility considerations
6.8 Observational standards
6.9 Ultrasonic inspection of thick castings
6.10 Subject term (key word) listing
6.11 Changes from previous issue
TABLE
1. Sampling, radiographic inspection of class 2
castings and magnetic particle and liquid penetrant
inspection of class 4 castings
2. Sampling, radiographic inspection of class 3
castings
3. Maximum allowable gate, riser and parting line
projections
4. Maximum permissible discontinuity size and
distribution (in inches) for magnetic particle (MT)
and liquid penetrant (PT) inspection
5. Notes for tables 6 though 14
6. Maximum permissible radiographic severity levels
for discontinuities in aluminium castings per
ASTM E 155
7. Maximum permissible radiographic severity levels
for discontinuities in magnesium castings per
ASTM E 155
8. Maximum permissible radiographic severity levels
for discontinuities in investment steel castings
1 inch wall or less per ASTM E 192
9. Maximum permissible radiographic severity levels
for discontinuities in heavy walled steel castings
2-4.5 inch per ASTM E 186
10. Maximum permissible radiographic severity levels
for discontinuities in steel castings up to 2 inch
in thickness per ASTM E 446
11. Maximum permissible radiographic severity levels
for discontinuities in heavy walled 4.5-12 inch
steel castings per ASTM E 280
12. Maximum permissible radiographic severity levels
for discontinuities in high strength copper-base
and nickel-copper alloy castings up to 2 inch
in thickness per ASTM E 272
13. Maximum permissible radiographic severity levels
for discontinuities in high-strength copper-base
and nickel-copper alloy castings 2 - 6 inch in
thickness per ASTM E 272
14. Maximum permissible radiographic severity levels
for discontinuities in tin bronze castings up to
2 inch in thickness per ASTM E 310
Appendix
A. Test report technical content requirements
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