1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2002 07 30 Revised Updated and renumbered 1979 03 02 Released CDJ2-822557-C Printed copies are uncontrolled Page 1 of 2 Copyright 2002, Ford Global Technologies, Inc. STEEL, TERNE COATED - 11.5 % TIN MINIMUM
2、 ESA-M1A191-C STEEL, TERNE COATED - 8.0 % TIN MINIMUM ESA-M1A191-D 1. SCOPE The material defined by this specification is a low carbon steel, coated with terne alloy or a lead-tin composition applied by the hot dip process. 2. APPLICATION This specification was released originally for fuel filler ne
3、ck tubes. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 BASE METAL The base metal shall be a low carbon steel capable of being fabricated into
4、the intended formed component. 3.3 TERNE COATING Continuity and uniformity of the coating is of primary importance since pitting and corrosion of the base metal is objectionable. The quality of the terne coating shall be controlled by the following: 3.3.1 Coating Weight - Triple Spot Average, min 0.
5、15 oz/ft2/side (47g/m2) (ASTM A 309 - Procedure “D“ except strip one side, weigh to obtain coating weight, and repeat for other side. The result shall consist of the average of determinations from three specimens cut from the test sheet or coil, one specimen cut from the middle of the width and one
6、from each side not closer than 50 mm from the coil side edge. No one spot shall be less than 0.10 oz/ft2 (30 g/m2)/side.) ENGINEERING MATERIAL SPECIFICATION ESA-M1A191-C/D Page 2 of 2 Copyright 2002, Ford Global Technologies, Inc. 3.3.2 Coating Porosity Density, Average, max 45 spots/in2/side) (FLTM
7、 BQ 5-6) (7 spots/cm2/side) 3.3.3 Coating Composition, % Tin, min (ASTM A 309 - Procedure “A“) “C“ Suffix 11.5 “D“ Suffix 8.0 3.4 RETEST If any test panel fails to meet the requirements of the specification, retest samples shall be taken from two other panels in the same coil and if either of these samples fails to conform to the requirements, the coil shall be rejected. 3.5 TOLERANCES Unless otherwise specified on the engineering drawing or purchase order, the tolerance must conform to those specified in ASTM A 308.
