Workmanship Manual 6310034 - L-3 Communications

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ELECTRODYNAMICS, INC Doc. No. 6310034Rolling Meadows, IL 60008Revision: EAcceptable WorkmanshipUnacceptable WorkmanshipGSlight Discoloration / Oxidation (i.e.,Corrosion)Severe Discoloration / Oxidation(Likely Substrate Bleed-Thru/Plating TooThin)Use or disclosure of data on this sheet is subject to the restriction on the title page of this document.Page 22 of 61
ELECTRODYNAMICS, INC Doc. No. 6310034Rolling Meadows, IL 60008Revision: E1.7 ELECTRODEPOSITED TINReference: ASTM B 545 – Standard Specification for Electrodeposited Coatings of Tin,Paragraph(s): 6.3 - 6.5.1.7.1 Engineering Drawing Call Out: In the event the engineering drawing does not call out aspecific tin composition, the tin composition shall contain a minimum of 3% lead.1.7.2 Acceptable Workmanshipa. ASTM B 545: 6.3 Appearance — Tin coatings shall have the characteristic appearance,including surface texture (4.3 per ASTM B 545), for the process used. The appearanceshall be uniform throughout, insofar as the basis metal will permit. They shall beadherent and visually free of blisters, pits, peeled areas, cracks, nodules, and unplatedareas. They shall not be stained or discolored. Flow-brightened coatings shall be freeof dewetted areas and beads. All surfaces shall be substantially free of grease or oilused in the flow-brightening process.b. ASTM B 545: 6.4 All tin-coated articles shall be clean and undamaged. Whennecessary, preliminary samples showing the finish shall be supplied to and approved bythe purchaser. Where a contact mark is inevitable, its location shall be subject toagreement between the supplier and the purchaser.c. ASTM B 545: 6.5 Thickness of Coatings—Tin coatings on articles shall conform to thethickness requirements specified in 4.2 of ASTM B 545 as to the minimum thickness onsignificant surfaces.d. Coatings shall be free of visible mechanical damage and similar gross defects whenviewed at up to 4X magnification.1.7.3 Packaginga. Coated surfaces shall be protected from damage during shipment and storage.b. When applicable, egg crate shipping containers are recommended during all storageand handling of the components. Each item should be individually packaged toprevent contact of adjacent items (e.g., in their own egg crate cell).Use or disclosure of data on this sheet is subject to the restriction on the title page of this document.Page 23 of 61
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Workmanship Manual 6310034 - L-3 Communications

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