1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2013 05 06 N Status A1/2/3/4/5/6/7/8/9/10 no direct replacement, use CBP strategy D. Rhuno, NA 2009 01 08 Revised Added A11 Added 3.4.1 Rev 1, 3.4, 3.5, 3.7, 4.2 local procedure V1P-03-132 refers. Exceptions to this (for PAG) shall be authori
2、sed by Materials Engineering. (* the currently released level) 3.4.2 Use of Engineering Specifications for Thickness (see also para 4.6) This para is for the Americas ONLY. Use ES-YC15-1N260-A(-)* ie. all plus thickness tolerances. (* the currently released level) 3.5 FORMABILITY The quality level o
3、f steel supplied to fabricate a specific component shall be negotiated between the manufacturing activity and the steel supplier. Acceptance of subsequent orders by the steel supplier for a given component at the agreed upon quality level implies that all steel supplied will be of a comparable quali
4、ty level and will form that part satisfactorily as defined by the manufacturing activity. The company may, at its option and in agreement with the steel supplier, define characteristics such as mechanical properties, testing direction, formability, surface texture, oiling, thickness 1 micrometer (+
5、0.5 micrometer) band width; 12.5 mm minimum effective traverse length; flat skid type is defined thus: . Class 1 (also known as “B“ (EN 10130) or full finish (FF): Ra 1.0 - 1.7 (2.5 mm cut-off) Peak density 45 ppcm (Peak Valley Pairs per centimeter) minimum (at 2.5 mm cut-off). . Class 2 (also known
6、 as “A“ (EN 10130) or general purpose (GP): Ra 1.0 - 2.4 (2.5 mm cut-off) Peak Density not defined. . Class 3 Ra and Peak Density not defined. 3.8 PAINTABILITY Material supplied to these specifications must have prior approval for paintability by the responsible Materials Engineering activity. This
7、approval shall be based on samples prepared to the local process and performance requirements appropriate to the country of vehicle manufacture. Where the material or component is delivered to Ford in the fully painted condition, this para is not applicable and the performance defined by the drawing
8、 is mandatory. Where the final product is to be surface coated by other methods, e.g. electroplate, a similar approval procedure applies. 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. ENGINEERING MAT
9、ERIAL SPECIFICATION WSS-M1A341-A1/A2/A3/A4/A5/A6/A7/A8/A9/A10/A11/A12 Copyright 2013, Ford Global Technologies, LLC Page 5 of 6 4.1 INITIAL SUPPLIER APPROVAL (UNCOATED ONLY For information for coated dent resistant steel submissions see WSS-M1P94-A) For initial approval, the supplier should furnish
10、the following information for each variant: . 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 requirements outlined in para 3, with the exception that paintability testing shall be conducted on one samp
11、le. . Weldability test results from production samples as outlined in para 3.6. To control weldability on an ongoing basis, the Supplier Control Plan will indicate the maximum chemistry and minimum gage allowed for each supplier approval submission. These levels will be negotiated between the approp
12、riate Ford Materials Engineering activity and the supplier at the time of submission. It is therefore important, where possible, that samples with higher chemistry and lower gage be selected for testing. . Mechanical property histograms including mean and standard deviation values. Data shall consis
13、t of a minimum of 40 measurements for each property in para 3.3, taken from a minimum of 20 coils, while the process is operating in statistical control. Upon approval, the material will be added to the Engineering Material Approval Source List. 4.2 REFERENCE DOCUMENTS The reference documents are: A
14、STM E 8M ISO 6892 WSS-M1P94-A ASTM A 568M EN 10131 WSS-M99P9999-A1 ESB-M2P129-B EN 10002 FLTM BA 013-04 ESB-M2P130-A ES-YC15-IN260-A(-) WSS-M99P1111-A V1P-03-132 ES6G91-1N260-A(-) ES-6H52-00001-A(-) 4.3 ISOTROPIC CONDITION r delta r: 0.25 max.; n bar: 0.18 min WSS-M1A341-A11: r bar: 1.4 max.; delta
15、r: 0.25 max; n bar: 0.17 min WSS-M1A341-A12: r bar: 1.4 max.; delta r: 0.25 max; n bar: 0.17 min. (r bar = (r0+r90+2r45)/4; delta r = (r0+r90-2r45)/2; n bar = (n0+n90+2n45)/4) 4.4 METHOD OF SPECIFYING The specification on the Engineering Drawing shall include, if applicable, the surface quality; als
16、o the coating(s), as defined by WSS-M1P94-A. e.g. Steel, Sheet, Bake Hardenable, Uncoated, 210 MPa minimum as received Yield Strength, for a non-visible component would be specified thus: ENGINEERING MATERIAL SPECIFICATION WSS-M1A341-A1/A2/A3/A4/A5/A6/A7/A8/A9/A10/A11/A12 Copyright 2013, Ford Global
17、 Technologies, LLC Page 6 of 6 WSS-M1A341-A4: Class 3 e.g. Steel, Sheet, Non-Bake Hardenable, Zinc Coated, 250 MPa minimum as received Yield Strength, for a non-visible component would be specified thus: WSS-M1A341-A2, coated to WSS-M1P94-A: 60G60G, Class 3 e.g. Steel, Sheet, Bake Hardening, Isotrop
18、ic, Electro-Zinc Coated, 235 minimum MPa as received Yield Strength, for a visible exterior component would be specified thus: WSS-M1A341-A7, coated to WSS-M1P94-A: 50G50G-EL, Class 1 4.5 PAINTABILITY Material supplied to North America shall meet the following requirements: . Material intended for C
19、lass 1 surface applications shall meet the requirements of ESB-M2P130-A. . Material intended for Class 2 and 3 surface applications shall meet the requirements of ESB-M2P129-B. 4.6 THICKNESS TOLERANCE (CAUTION) If and when choosing a minimum gage from ES-YC15-1N260-AB, if the previous choice of gage
20、 was nominal, it is important to avoid generating an inadvertent increase in the ACTUAL thickness of the component, and consideration should be given to specifying the next lowest minimum gage e.g. for an existing 0.80 mm nominal gage, the nearest equivalent minimum gage in ES-YC15-1N260-AB is 0.75
21、mm. 4.7 ADDITIONAL TERMS USED IN EUROPE WSS-M1A341-A1: Rephos IF 210 (or) Rephos ULC 210 WSS-M1A341-A2: Rephos IF 250 (or) Rephos ULC 250 WSS-M1A341-A4: BH 220 Type WSS-M1A341-A5: BH 260 Type WSS-M1A341-A7 Reduced Yield BHZ 260 Type WSS-M1A341-A8: Rephos IF 180 (or) Rephos ULC 180 WSS-M1A341-A10: 22
22、0i Type WSS-M1A341-A11: 250i Type WSS-M1A341-A12: 300i Type (Rephos = Rephosphorised; IF = Interstitial Free; ULC = Ultra Low Carbon; i = Isotropic steel BH = Bake Hardenable) 4.8 GUIDANCE FOR WSS-M1A341-A1, A2, A8, A10, A11 & A12 Although these materials typically do not Bake Harden, 2% Strain typically increases the Yield Strength by 35 MPa minimum. (See para 3.3).
