1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 09 28 N-STATUS No replacement G. Weber, NA 2003 07 25 Revised Para 3.0 inserted; Para 3.6 deleted 1963 08 02 Released AS1 # 1013 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, Inc. Page 1 of 2 PLATING, NICKEL CH
2、ROME - RUSTLESS STEEL SCREWS ESB-M1P15-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE This specification defines the quality required for screws for external attachment. 2. APPLICATION This specification was released originally for an electroplate where adequate corrosion resistance along with good appear
3、ance is required. 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). 3.1 SIGNIFICANT SURFACES All significant surfaces shall meet the corrosion and plat
4、e thickness requirements. Significant surfaces are those which are visible and are subjected to wear and/or corrosion such as heads of screws. Threads and Phillips recess shall be completely plate, but shall not be subject to plate thickness requirements, unless specifically required. 3.2 APPEARANCE
5、 The plated screws shall be free from surface imperfections such as rough or orange peel conditions, pits, slivers, breaks in the plate and areas or lines buffed through the outer layers of metal. 3.3 COMPOSITION 3.3.1 Base Metal Stainless steel as shown on engineering drawings. 3.3.2 Plating Thickn
6、ess, min 3.3.2.1 Nickel 0.0003 in (8 m) (ASTM B 487) 3.3.2.2 Chromium Finish 0.000010 in (0.25 m) (ASTM B 556 or ASTM B 504) The specified plating thickness shall not apply to the Phillips recess or the thread area. ENGINEERING MATERIAL SPECIFICATIONESB-M1P15-A Printed copies are uncontrolled Copyri
7、ght 2010, Ford Global Technologies, Inc. Page 2 of 2 3.4 CASS Test, min 16 h (FLTM BQ 105-01) 3.4.1 As Received The finish part shall pass the 16 h cycle with no evidence of red rust or other discoloration on significant surfaces. Samples shall be placed in corrosion cabinet with the head of the screw facing up at a 45 angle. 3.5 PLATING ADHESION There shall be no loss of plating adhesion after grinding across the screw head using a 20 to 50 grit abrasive wheel. Other methods of testing may be used provided they are of equal severity.
