1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2012 07 25 N-Status No replacement A. Wedepohl, NA 2005 02 08 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.8, 4 1989 09 15 Released R.D. Moore, J.A.F., NAAO. J.P.C.Lines, EAO Controlled document at www.MATS Copyright 2012, Ford Global Technologi
2、es, LLC Page 1 of 2 SOLDER PASTE - TIN BASED NOT FOR NEW DESIGN WSB-M11A42-A 1. SCOPE The material defined by this specification is a tin based, self-fluxing, body solder paste. 2. APPLICATION This specification was released for lead free material used for tinning metal surfaces preparatory to body
3、contour soldering. It was designed to be used in conjunction with WSB-M11A41-A solder. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.3 PASTE COMP
4、OSITION (Weight Percent) (ASTM D 4055 modified. Solder isolated using water and 0.6 micron filter, flux obtained by difference) Solder 58.0 - 62.0 Flux 38.0 - 42.0 3.4 SOLDER COMPOSITION (Weight Percent (Inductively Coupled Plasma Emission Spectrometry. Solder isolated by ASTM B 486) Copper 0.1 max
5、Zinc 0.010 max Lead 0.1 max Arsenic 0.02 max Iron 0.15 max Other 0.03 max Tin Remainder 3.5 FLUX COMPOSITION Weigh a portion of solder paste calculated to contain 10 g of flux, as determined in Paragraph 3.3, into a 1000 ml volumetric flask and dilute to volume. Mix well and allow the solder to sett
6、le. Analyze the flux by removing aliquots of sample from above the settled solder. Total Chlorides as Cl 11.0 min (FLTM AK 115-01) Total Acidity as HCl 3.5 max (FLTM AK 106-01, modified, titration with 0.5 N NaOH) ENGINEERING MATERIAL SPECIFICATION WSB-M11A42-A Copyright 2012, Ford Global Technologi
7、es, LLC Page 2 of 2 Zinc Chloride as ZnCl2 14.5 max (Calculated based on total Cl and HCl) Water-Miscible Solvent 2.0 max (FLTM AK 117-01) Water Remainder (ASTM D 95) Other Less than 1.0% (By difference) pH, 1 % solution by weight, 25 C 1.0 - 2.0 (ASTM E 70) 3.6 STABILITY Material shall permit stand
8、ing in original container without caking. 3.7 QUALITY The material, when applied to a wire brushed metal surface and melted with a torch, shall produce a good tinned surface when wiped with a clean soft cloth. 4. GENERAL INFORMATION The information given below is provided for clarification and assis
9、tance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 4.1 NEW SOURCE APPROVAL The vendor must do the following: Contact the Body Resident Engineer at the production plant, to determine if there is a need for new suppliers. If
10、there is interest, a plant tryout coordinated by Body and Assembly Engineering is required to determine functional acceptance. If the tryout is satisfactory, the Body Resident Engineer is to notify the Body Materials and Corrosion Engineering Department, in writing, of the successful tryout, and the need for approval of a new supplier. The Body Materials and Corrosion Engineering Department, B&CE will then finalize the approval.
