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1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 0 2012 01 10 Released D. Jordan, NA, A. Toennessen, EU Controlled document at www.MATS Copyright 2012, Ford Global Technologies, LLC Page 1 of 7 STEEL, SHEET, COLD ROLLED, LOW CARBON WSS-M1A365-A11 STEEL, SHEET, COLD ROLLED, LOW CARBON,

2、WSS-M1A365-A12 GENERAL FORMABILITY STEEL, SHEET, COLD ROLLED, LOW CARBON, WSS-M1A365-A13 IMPROVED FORMABILITY STEEL, SHEET, COLD ROLLED, LOW CARBON, WSS-M1A365-A14 HIGH FORMABILITY STEEL, SHEET, COLD ROLLED, LOW CARBON, WSS-M1A365-A15 EXTRA HIGH FORMABILITY STEEL, SHEET, HOT ROLLED, LOW CARBON WSS-M

3、1A365-A20 STEEL, SHEET, HOT ROLLED, LOW CARBON, WSS-M1A365-A21 GENERAL FORMABILITY STEEL, SHEET, HOT ROLLED, LOW CARBON, WSS-M1A365-A22 IMPROVED FORMABILITY STEEL, SHEET, HOT ROLLED, LOW CARBON, WSS-M1A365-A23 HIGH FORMABILITY 1. SCOPE The materials defined by these Global specifications are fully k

4、illed, fine grained, low carbon steel sheet, with specified minimum yield strength between 110 and 240 MPa and good forming, joining, and painting characteristics. The steel sheet may achieve its final thickness by cold rolling, hot rolling, continuous thin-strip casting, or other means. All require

5、ments of the specific variant are to be met regardless of the final thickness reduction method. Specification WSS-M1P94-A shall be used where pre-coating by the steel supplier is required. All requirements of the specific variant are to be met with or without pre-coating, except as noted in these sp

6、ecifications or as noted as exceptions on the Engineering Drawing. Ford Motor Company may, at its option and in agreement with the local or regional supplier, define additional and/or restricted technical delivery requirements such as mechanical properties, forming characteristics and surface textur

7、e, for a specific grade and/or part. The defined requirements shall be mandatory and no characteristics shall conflict with these engineering specifications. ENGINEERING MATERIAL SPECIFICATION WSS-M1A365-A11/A23 Copyright 2012, Ford Global Technologies, LLC Page 2 of 7 2. APPLICATION These Global sp

8、ecifications were released originally for automotive body and chassis parts. 2.1 LIMITATIONS Common Global Grade Names are provided for information purposes and are not intended to be used on Engineering Drawings or CAD files. Not all grade / gauge / width / coating combinations are available. Conta

9、ct Product Development Materials Engineering for assistance or Global Materials and Fastener Standards () for help in locating the responsible engineer. Material supplied to these specifications may contain titanium or other transition metals as alloying additions. Such alloyed steels, if subsequent

10、ly surface treated by a nitrocarburising and/or oxidizing process, risk becoming embrittled due to the formation of ultrafine TiN or other precipitates. Accordingly, special consideration should be given to low carbon steel that contains intentional additions of titanium or other transition metals f

11、or parts that may be subjected to nitrocarburising and/or oxidizing processes. 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). Material suppliers and

12、 part producers must conform to the Companys Quality System Requirements. In order for materials to comply with the requirements of the material specification they shall be sourced from suppliers listed in the Ford Motor Company Approved Source List, (ASL). See also paragraph 4.1. 3.2 CHEMICAL COMPO

13、SITION AND MICROSTRUCTURE (ASTM E112, JIS G0320, ISO 4967 / ASTM E45) 3.2.1 Chemical Composition The upper and lower limits of chemical composition of the controlled elements shall be established by the supplier and included in the suppliers Control Plan. Heat and/or check analyses shall be provided

14、 as part of the initial material source approval process in a format suitable for upload into the Ford Material Database. 3.2.2 Microstructure The grain size number shall be established as part of the initial material source approval process and shall be consistent (within 1 unit) throughout the thi

15、ckness of the sheet. The steel sheet shall be free from internal defects that adversely affect manufacturing or part functionality. Examples of defects may include: pipe laminations, non-metallic inclusions, segregation, and blowholes. Non-metallic inclusion content shall not exceed a rating of 2.0

16、for thin and 2.0 for heavy when tested in accordance with ASTM E45 Method D, Plate III, by analysis at 100X. ENGINEERING MATERIAL SPECIFICATION WSS-M1A365-A11/A23 Copyright 2012, Ford Global Technologies, LLC Page 3 of 7 3.3 MECHANICAL PROPERTIES (ASTM E8M, ASTM E517, EN 10002-1, ISO 6892, ISO 10113

17、, ISO 10275, SEP 1240, JIS Z2241) For initial approval requirements see paragraph 4.1. Mechanical properties are valid in both the transverse and longitudinal directions. Certification of ongoing production material shall be in accordance with regional and/or local requirements. For the determinatio

18、n of mechanical properties, the material cross sectional area shall be defined as that of the steel; contribution of any metallic and/or organic coating to the calculated cross-sectional area used for stress calculations is neglected. Yield Strength is defined as lower yield stress or 0.2% proof str

19、ess (for materials without marked yield point). ASTM Total Elongation is measured with an ASTM (50 mm) test bar (ASTM E 8M). EN Total Elongation is measured with an ISO II (80 mm) test bar (EN 10002-1). JIS Total Elongation is measured with a JIS #5 test bar (JIS Z 2201). Plastic Strain Ratio (r-val

20、ue) is defined for a specific test direction with respect to the rolling direction. It is measured at 20% total elongation (or maximum uniform elongation if less than 20%). See ASTM E 517, ISO 10113, or JIS Z 2254. Average Plastic Strain Ratio (ravg) is calculated as a weighted average of the indivi

21、dual r-values, i.e., ( 0o + 90o+ 2 x 45o) / 4 Strain Hardening Exponent (n-value) is measured over the range 10-20% strain (or 10% to end of uniform elongation if less than 20%). See ASTM E 646 or ISO 10275. Table 1: Mechanical Properties for Typically Cold Rolled Variants Variant A11 A12 A13 A14 A1

22、5 Common Global Grade Name CR1 CR2 CR3 CR4 CR5 Yield Strength, MPa (min)140 140 140 140 110 Yield Strength, MPa (max) 280 240 210 180 160 Tensile Strength, MPa (min) 270 270 270 270 260 Tensile Strength, MPa (max) 410 370 350 330 330 ASTM Total Elongation, %(min) N/R 34 38 40 42 EN Total Elongation,

23、 % (min) N/R 34 38 40 42 JIS Total Elongation, % (min) N/R 37 41 43 45 ravg(min) N/R N/R 1.5 1.6 1.7 r90(min) N/R 1.3 1.6 1.9 2.0 n value (min) N/R 0.16 0.18 0.20 0.22 Table 2: Mechanical Properties for Typically Hot Rolled Variants Variant A20 A21 A22 A23 Common Global Grade Name HR0 HR1 HR2 HR3 Yi

24、eld Strength, MPa (min)240 210 180 180 Yield Strength, MPa (max) 350 320 290 260 Tensile Strength, MPa (min) 310 310 270 270 Tensile Strength, MPa (max) 460 430 400 380 ASTM Total Elongation, % (min) 26 30 34 38 EN Total Elongation, % (min) 22 26 30 34 JIS Total Elongation, % (min) N/R 33 39 42 n va

25、lue (min) 0.12 0.14 0.16 0.18 ENGINEERING MATERIAL SPECIFICATION WSS-M1A365-A11/A23 Copyright 2012, Ford Global Technologies, LLC Page 4 of 7 3.4 DIMENSIONS AND DIMENSIONAL TOLERANCES 3.4.1 Thickness and Thickness Tolerance Unless otherwise specified by Ford Motor Company on the Engineering Drawing

26、or Purchase Order, the tolerance for thickness shall comply with ESBAU5-1N260-AA or latest level. 3.4.2. Other Dimensional Tolerances Length, width, flatness, camber, out-of-square, mass and other tolerances for the material as delivered by the steel supplier are defined by the relevant local manufa

27、cturing activity. Examples include ASTM A 568M, ASTM A 635M, JFS A 1001, JFS A 2001, EN 10051, EN 10131, and EN 10143 3.5 FORMABILITY In conjunction with the material supplier and Product Development Materials Engineering, the affected local manufacturing activity shall, as part of the initial mater

28、ial source approval process, approve the formability of this material by means of laboratory test(s), manufacturing trial(s), and/or another mutually acceptable alternative, using the equipment and methods that are proposed for production. If needed to enable the fabrication of a specific component,

29、 restricted tolerances and/or additional material property requirements (i.e., the “quality level“ of the steel) shall be developed by the affected manufacturing activity and the steel supplier. Examples include, but are not limited to: restricted yield strength range, restricted gauge tolerance, sp

30、ecified minimum n-value, and specified surface roughness. The “quality level“ of the steel for a specific component: shall not conflict with specified requirements in paragraph 3 of this Engineering Material Specification shall be described in detail by the local manufacturing activity shall be a ma

31、ndatory extension of these Engineering Material Specifications 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 quality level and will form that part satisfactorily as defined and reco

32、rded by the manufacturing activity. 3.6 JOINABILITY In conjunction with the material supplier and Product Development Materials Engineering, the affected local manufacturing activity shall, as part of the initial material source approval process, approve the joinability (e.g., resistance spot weldin

33、g, riveting, adhesive bonding) of this material by means of laboratory test(s), manufacturing trial(s), and/or another mutually acceptable alternative, using the equipment and methods that are proposed for production. If needed to enable the fabrication of a specific component, restricted tolerances

34、 and/or additional material property requirements (i.e., the “quality level“ of the steel) shall be developed by the affected manufacturing activity and the steel supplier. Examples include, but are not limited to: restricted chemical composition, restricted gauge tolerance, specified minimum n-valu

35、e, and specified surface condition. ENGINEERING MATERIAL SPECIFICATION WSS-M1A365-A11/A23 Copyright 2012, Ford Global Technologies, LLC Page 5 of 7 The “quality level“ of the steel for a specific component: shall not conflict with specified requirements in paragraph 3 of this Engineering Material Sp

36、ecification shall be described in detail by the local manufacturing activity shall be a mandatory extension of these Engineering Material Specifications Acceptance of subsequent orders by the steel supplier for a given component at the agreed upon quality level implies that all steel supplied will b

37、e of a comparable quality level and can be joined satisfactorily as defined and recorded by the manufacturing activity. 3.7 SURFACE APPEARANCE, CONDITION, AND SURFACE ROUGHNESS (Ra) 3.7.1 Surface Classification Surface appearance shall be defined as Class 1 or Class 3: A Class 1 surface shall be spe

38、cified for parts of the vehicle that are exposed to view after paint or trim. A Class 3 surface shall be specified for parts of the vehicle that are concealed during normal use. 3.7.2 Incoming Lubricant Products coated with a designated mill-applied lubricant (i.e., mill oil or prelube) shall comply

39、 with the regional requirements and regional approved lubricant list. 3.7.3 Surface Roughness The surface roughness and associated parameters for a given component are to be defined and recorded by the regional manufacturing activity. 3.8 PAINTABILITY In conjunction with the material supplier and Pr

40、oduct Development Materials Engineering, the affected local manufacturing activity shall, as part of the initial material source approval process, approve the paintability (e.g., compatibility, appearance, performance) of this material by means of laboratory test(s), manufacturing trial(s), and/or a

41、nother mutually acceptable alternative, using the equipment and methods that are proposed for production. If needed to enable the fabrication of a specific component, restricted tolerances and/or additional material property requirements (i.e., the “quality level“ of the steel) shall be developed by

42、 the affected manufacturing activity and the steel supplier. Examples include, but are not limited to: restricted dross content, specified surface roughness, and specified surface condition. The “quality level“ of the steel for a specific component: shall not conflict with specified requirements in

43、paragraph 3 of this Engineering Material Specification shall be described in detail by the local manufacturing activity shall be a mandatory extension of these Engineering Material Specifications Acceptance of subsequent orders by the steel supplier for a given component at the agreed upon quality l

44、evel implies that all steel supplied will be of a comparable quality level and can be painted satisfactorily as defined and recorded by the manufacturing activity. ENGINEERING MATERIAL SPECIFICATION WSS-M1A365-A11/A23 Copyright 2012, Ford Global Technologies, LLC Page 6 of 7 4. GENERAL INFORMATION T

45、he information given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 4.1 INITIAL SUPPLIER APPROVAL BY FORD For initial approval, the supplier should contact Product Developmen

46、t Materials Engineering to obtain the latest revision of the Sheet Metal Material Specification/Source Approval Process and test requirement checklist. Upon initial technical approval and completion of a functional prove-out (line trial), the material will be added to the Engineering Material Approv

47、ed Source List (ASL). 4.2 REFERENCE DOCUMENTS The reference documents are: External Standards: ASTM A568M Standard Specification for Steel, Sheet, Carbon, and High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled, General Requirements for ASTM A635M Standard Specification for Steel Sheet and Strip, H

48、eavy-Thickness Coils, Carbon, Hot-Rolled ASTM E8M Test Methods for Tension Testing of Metallic Materials ASTM E45 Test Methods for Determining the Inclusion Content of Steel ASTM E112 Test Methods for Determining Average Grain Size ASTM E517 Test Method for Plastic Strain Ratio r for Sheet Metal AST

49、M E646 Test Method for Tensile Strain-Hardening Exponents (n-values) of Metallic Sheet Materials EN 10002-1 Metallic Materials Tensile Testing Part 1: Method of Test at Ambient Temperature EN 10051 Specification for Continuously Hot Rolled Uncoated Plate, Sheet and Strip of Non-Alloy and Alloy Steels Tolerances on Dimensions and Shape EN 10131 Cold Rolled Uncoated and Zinc or Zinc-Nickel Electrolytically Coated Low Carbon and High Yield Strength Steel Flat Products for Cold

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