1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2002 09 26 Revised Updated and renumbered 1993 07 21 NB00I10043054269 Released- J.E. Nelson NAAO C. Sales EAO Printed copies are uncontrolled Page 1 of 3 Copyright 2002, Ford Global Technologies, Inc. STEEL,
2、 HIGH STRENGTH, WELDED TUBING WSB-M1A331-A1 1. SCOPE The material defined by this specification is fully killed, fine grained, high strength martensitic carbon steel electric resistance welded tubing. 2. APPLICATION This specification was released originally for material used in door intrusion beams
3、 where a high strength to weight ratio is required. Caution: Due to the hardenability response of these materials, individual welding schedules must be developed for each application. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must confor
4、m to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 CHEMICAL COMPOSITION (weight percent) The percentages given are heat or cast (ladle) analysis: Grade 900 1100 1300 1500 Carbon, max .09 .13 .20 .26 Manganese, max .60 .60 .60 .60 Phosphorous, max .02 .02 .02 .02 S
5、ulfur, max .025 .025 .025 .025 ENGINEERING MATERIAL SPECIFICATION WSB-M1A331-A1 Page 2 of 3 Copyright 2002, Ford Global Technologies, Inc. 3.3 MECHANICAL PROPERTIES (ASTM A 370/ISO 6892) Grade 900 1100 1300 1500 Tensile Strength, MPa, min 900 1100 1300 1500 Tensile Strength, MPa, Typical 1140 1310 1
6、520 1690 Elongation, %, min 4 4 3.5 3.5 Elongation, %, Typical 6.5 6.5 5 5 Note: Tension test specimens shall be taken longitudinally, 180 deg from the weld and shall conform dimensionally to specimen No. 2 shown in Figure 19, ASTM A 370. 3.4 WELD QUALITY Each tube shall pass nondestructive testing
7、to assure weld soundness. Supplier inspection method must be submitted prior to source approval. Width of combined weld fusion zone and heat affected zone shall not exceed a total of 12 mm. Measurements shall be made between points at the beginning of the heat affected zone where hardness has been r
8、educed by 6 HRC equivalent points from the adjacent non-heat affected material. 3.5 PAINTABILITY Material supplied to this specification must have prior approval for paintability by the responsible Materials Engineering Activity. This approval shall be based on samples prepared to the local process
9、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 below is provided for clarification and assistance in meeting the requirements of this specification. 4.
10、1 INITIAL SUPPLIER APPROVAL For initial approval, the supplier must furnish the following information for each grade: . A plan detailing how each requirement of para 3 will be controlled on a continuing production basis. . Test results from a typical production sample for the requirements outlined i
11、n para 3. . Tensile strength, yield 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. ENGINEERING MATERIAL SPECI
12、FICATION WSB-M1A331-A1 Page 3 of 3 Copyright 2002, Ford Global Technologies, Inc. . Weld quality inspection method outlined in para 3.4. . Description and frequency of destructive tube sample testing. . Paintability test results from typical production samples as outlined in para 4.2. Upon approval,
13、 the material will be added to the Engineering Material Approved Source List. 4.2 PAINTABILITY TEST METHODS Material supplied to European Automotive Operations (EAO) shall meet the requirements of WSK-M2P136-A. Material supplied to North American Automotive Operations (NAAO) shall meet the following
14、 requirements: . Material intended for Class 1 surface applications shall meet the requirements of ESB-M2P130. . 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 tha
15、t are exposed after paint or trim. A Class 2 surface shall be specified for parts of the body not covered by trim 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.
