1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 0 2013 12 16 Released A. Wedepohl therefore, there are no requirements for mechanical properties prior to heat treatment. Incoming mechanical properties can be developed and specified on the part print to facilitate production of a speci
2、fic component (see paragraph 3.6). Yield strength, tensile strength, and elongation are also likely to vary with material thickness and supplier. See paragraph 4.2 for typical incoming mechanical properties. 3.10 MECHANICAL PROPERTIES AFTER HEAT TREATMENT (ISO 6892/ASTM E8M/EN 10002, Longitudinal, 5
3、0 mm gage length, ASTM E10) Mechanical properties after heat treat must be listed and controlled on the Engineering Drawing. The type of heat treatment should also be listed. See paragraph 4.3 for an example. ENGINEERING MATERIAL SPECIFICATION WSS-M1A374-A1 Copyright 2013, Ford Global Technologies,
4、LLC Page 4 of 5 4. GENERAL INFORMATION The 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 su
5、pplier should contact Product Development 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
6、added to the Engineering Material Approved Source List (ASL). 4.2 MECHANICAL PROPERTIES PRIOR TO HEAT TREATMENT Typical properties for steel 7 11 mm thick as delivered by the steel supplier are: Yield strength: 310 to 450 MPa. Tensile strength: 450 MPa Total Elongation: 22% 4.3 METHOD OF SPECIFYING
7、The specification on the Engineering Drawing, CAD file, or related documents shall include the base steel, surface classification and any performance requirements before and after heat treatment. Example: Steel: WSS-M1A374-A1, Black, Class 3 Chemistry: Carbon Equivalent (CE) 0.41 (Note: CE = C+Mn/6+
8、(Cr+Mo+V)/5+(Ni+Cu)/15) Heat Treat: Austenitization, water quench, and temper. Microstructure: Tempered martensite throughout with small amounts of bainite likely and allowed Mechanical Properties after heat treatment: Yield Strength 800 MPa min Tensile Strength 890 MPa min Total Elongation 12% min
9、Brinell Hardness 269 331 HBW 10/3000 4.4 REFERENCE DOCUMENTS The reference documents are: ASTM A568M Standard Specification for Steel, Sheet, Carbon, and High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled, General Requirements ASTM A635M Standard Specification for Steel Sheet and Strip, Heavy-Thic
10、kness Coils, Carbon, Hot-Rolled ASTM A751 Standard Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products ASTM E8M Test Methods for Tension Testing of Metallic Materials ASTM E10 Standard Test Method for Brinell Hardness of Metallic Materials EN 10002-1 Metallic Materials T
11、ensile 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 ESBAU5-1N260-AA Sheet Metal Gauges and Thickness Tolerances ES-F75B-11007 Specification She
12、et Metal Surfaces and Edges ENGINEERING MATERIAL SPECIFICATION WSS-M1A374-A1 Copyright 2013, Ford Global Technologies, LLC Page 5 of 5 ISO 6892 Metallic Materials Tensile Testing at Ambient Temperature JFS A 1001 Hot Rolled Steel Sheet and Strip for Automobile Use JFS A 2001 Cold Rolled Steel Sheet and Strip for Automobile Use JIS G 0320 Standard Test Methods for Heat Analysis of Sheet Products SAE J419 Methods of Measuring Decarburization WSBCPA-1B310-AA Welding Specification WSS-M99P1111-A Standard Requirements for Production Materials 5. SUMMARY OF REVISIONS
