1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2013 05 06 N Status No direct replacement, use CBP strategy D. Rhuno, NA 2002 09 30 Revised Updated and renumbered 1996 08 27 Activated J. E. Nelson Controlled document at www.MATS Page 1 of 3 Copyright 2013
2、 Ford Global Technologies, Inc. STEEL, HIGH STRENGTH, MARTENSITIC, SHEET WSS-M1A183-D NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is fully killed, fine grained, high strength martensitic carbon steel sheet. Specification WSS-M1P94-A shall be specified where pre
3、coating by the steel supplier is required. 2. APPLICATION This specification was originally released for material used in door intrusion beams, and bumpers where a high strength to weight ratio is required. Caution: Due to the hardenability response of these materials, individual welding schedules m
4、ust be developed for each application. 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 CHEMICAL COMPOSITION (weight percent) The percentages give
5、n are heat or cast (ladle) analysis: Grade 900 1100 1300 1500 Carbon, max .09 .13 .20 .26 Manganese, max .60 .60 .60 .60 Phosphorus, max .020 .020 .020 .020 Sulfur, max .025 .025 .025 .025 ENGINEERING MATERIAL SPECIFICATION WSS-M1A183-D Page 2 of 3 Copyright 2013, Ford Global Technologies, Inc. 3.3
6、MECHANICAL PROPERTIES (ASTM A 370/ISO 6892) Grade 900 1100 1300 1500 Tensile Strength, 900 1100 1300 1500 MPa, min Elongation, %, min 2 2 2 2 3.4 SPOT WELDABILITY (Applies to grades 900 and 1100 only) (FLTM BA 013-04) All material must be capable of passing the above FLTM requirement. This requireme
7、nt does not apply to grades 1300 and 1500 which are considered non-spot weldable using conventional spot welding practices. 3.5 PAINTABILITY Material supplied to this specification must have prior approval for paintability by the responsible Materials Engineering Activity. This approval shall be bas
8、ed on samples prepared to the local process and resistance requirements appropriate to the country of Ford vehicle manufacture, or to the relevant Engineering Performance Specification (see para 4.2). 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in
9、meeting the requirements of this specification. 4.1 INITIAL SUPPLIER APPROVAL For initial approval, the supplier must furnish the following information: . A plan detailing how each requirement of para 3 will be controlled on a continuing basis. . Test results from a typical production sample for the
10、 requirements outlined in para 3. . Tensile strength and elongation histograms including mean and standard deviation values. Data shall consist of a minimum of 40 measurements for each property taken from a minimum of 20 coils while the process is operating in statistical control. . Paintability tes
11、t results from typical production samples as outlined in para 4.2. Upon approval, the material will be added to the Engineering Material Approved Source List. ENGINEERING MATERIAL SPECIFICATION WSS-M1A183-D Page 3 of 3 Copyright 2013, Ford Global Technologies, Inc. 4.2 PAINTABILITY TEST METHODS Mate
12、rial supplied to European Automotive Operations (EAO) shall meet the requirements of WSK-M2P136-A. Material supplied to North American Automotive Operations (NAA) shall meet the following requirements: . Material intended for Class 1 surface applications shall meet the requirements of ESB-M2P130. .
13、Material intended for Class 2 and 3 surface applications shall meet the requirements of ESB-M2P129. A Class 1 surface shall be specified for parts of the body or front end sheet metal that are exposed after plant or trim. A Class 2 surface shall be specified for parts of the body not covered by trim
14、 materials but exposed to view when the car doors or enclosure lids are in an open position. Class 3 metal surface specifications are parts that are wholly or partially concealed during normal use of the vehicle. Parts such as fender aprons, floor pans and unexposed underbody structural members typify parts that would be specified as Class 3.
