MIL-STD-792F(SH)
19 May 2006
material and no evidence of cracking, pitting, or corrosion caused by the marking material. Also, one marked and the unmarked sample shall be given guided-bend tests in accordance with ANSI/AWS 84.0. The bend test samples shall exhibit no cracking.
5.11.2.1 Type A and type F marking and residue from type 8 marking shall be removed using one of the following solvents:
(a) Unused or redistilled acetone
(b) Denatured alcohol (formula 23-A of k) (c) Isopropanol
(d) Perchloroethylene (tetrachloroethylene) (e) Trichloroethylene
"WARNING"
Vapor of solvents (d) and (e) are toxic. Spills have caused death at low concentrations. Use only in well ventilated areas.
ESCAPE IMMEDIATELY IF STRONG VAPOR ODORS ARE DETECTED.
5.11.2.1.1 Surfaces without crevices or inaccessible areas. Parts or surfaces containing no crevices or inaccessible areas may be cleaned by degreasing using any of the above solvents.
5.11.2.1.2 Surfaces with crevices and inaccessible areas. Parts or surfaces containing crevices or areas inaccessible to inspection for proper drainage shall be degreased only by immersion in solvents (a), (b), or (c) of the above list with no time restrictions. All parts shall be dried.
5.11.2.1.3 Halogenated solvents. Solvents (d) or (e) of the above list shall not be used on parts or surfaces with crevices. Caution shall be taken when using halogenated solvents (d) or (e) of the above list since decomposition into corrosive agents may occur. Corrosive agents which are generated at temperatures such as those produced during brazing and welding may attack materials of construction, notably corrosion resistant steel. When cleaned with halogenated materials, hardware shall be dried with clean air or inert gas.
5.11.3 All temporary markings shall be removed from material surfaces prior to fabrication operations which render markings inaccessible and prior to final heat treatment. The area exposed by mechanical removal of temporary markings shall be inspected by the same method (limited to liquid penetrant, magnetic particle or visual inspection) originally specified for the base material and shall meet the original base material acceptance criteria.
5.11.4 Temporary marking on the surface of hard, brittle materials such as 17-4PH stainless steel or cold worked Haynes 25 shall be applied by ink using rubber stamps or fabric marking pens or by electrochemical etching.
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