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MIL-STD-867 Temper Etch InspectionThis standard establishes requirements and test for performing temper etch inspection of carburized steels and tool and low alloy steels, which are heat treated above 1.24 x 109 Pascal PA 1.26 x 102 kilogram - force/square millimeter Kgf/mm2 or 1.8 x 105 pound - force/square inch psi. This standard applies to aircraft and missiles structural and propulsion system components when MIL-HDBK-6870 for guidance only and/or MIL-STD-866 are reference documents in the solicitation or contract.

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CONTENTS


PARAGRAPHS                                                                                                       PAGE


Table IV

9

5.4

Acid etch visual inspection

10

5.4.1

Rejection criterion

10

5.4.2

Acceptable color

10

5.5

Baking

10

5.6

In-service quality checks

10

5.6.1

Acid concentrations

10

5.6.2

Sensitivity

10

5.6.3

Magnetic particle inspection

11

5.6.4

Records

11

5.7

Re-etching

11

5.8

Seeking competent advice

11

5.9

Hardness testing

11

5.10

Rework/salvage

11

5.11

Acid etch removal

11

5.12

Marking

11

5.13

Toxic and hazardous substances

11


6.

NOTES

12

6.1

Intended use

12

6.2

Subject term (key word) listing

12

6.3

Changes from previous issue

12


CONCLUDING MATERIALS                                                                                       12


iv




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