1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 05 03 Revised Revised 3.5.3, 4.5 (spelling), 4.7, Added 3.3.2 Del 4.6 K J Thurgood (Ford PDE); S Buckingham (JLR)2004 07 27 Activated K J Thurgood (Ford PDE); S Buckingham (Jaguar) Printed copies are uncontrolled Copyright 2006, Ford Glob
2、al Technologies, LLC Page 1 of 5 STEEL, SHEET, BORON TREATED, HIGH STRENGTH WSS-M1A322-A3 (EUROPEAN APPLICATIONS) 1. SCOPE The material defined by this specification is a fully killed, fine grained, high strength boron treated steel and shall comply with WSS-M99A3-A. It may be coated by a hot dip Al
3、uminum + Silicon coating. Component manufacture shall be via the combined hot forming/die quenching route. 2. APPLICATION This specification was released originally for A local procedure V1P-03-132 refers. Exceptions to this (for PAG) shall be authorised by Materials Engineering. (* the currently re
4、leased level) 3.4 OTHER DIMENSIONS, TOLERANCES AND ASSOCIATED ITEMS . These shall be defined by the relevant national standards (see para 4.3 ) . As appropriate to the relevant national standards, the title of this paragraph shall be interpreted to include length, width, flatness, camber and mass. 3
5、.5 REQUIREMENTS FOR FINISHED COMPONENTS 3.5.1 Mechanical Properties (after hot forming/die quenching) (Longitudinal Tensile Specimens) (50 mm Gauge Length (A5 is permissible) (ISO 6892/ASTM E 8M/EN 10002) Ultimate Tensile Strength (MPa) 1300 min Yield Strength (MPa) (see also para 4.6) 950 min % Elo
6、ngation 4 min (A5: 6 min) Unless it is impractical to do so or is otherwise stated on the component engineering drawing or CAD file, tensile specimens shall be taken from the finished component. 3.5.2 Chemical Composition (weight percent for heat or cast (ladle) Carbon Silicon Manganese Phosphorus S
7、ulphur Chromium 0.20 - 0.25 0.15 - 0.50 1.00 - 1.40 0.030 max 0.025 max 0.10 - 0.35 Molybdenum Boron Titanium Aluminum C. E. 0.35 max 0.0015 - 0.0050 * * 0.60 max. (* means sufficient to combine with any nitrogen) (see also 4.4) (* means sufficient to fully kill the steel) (see also 4.4) C.E. is def
8、ined as %C + %Mn/6 + %(Cr + Mo + V)/5 + %(Ni + Cu)/15 ENGINEERING MATERIAL SPECIFICATIONWSS-M1A322-A3 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 5 3.5.3 Formability The quality level of steel supplied to fabricate a specific component shall be negotiated
9、between the manufacturing activity and the steel supplier. Steel cleanliness may involve the use of a mutually agreed referee method. 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 q
10、uality 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 also the coating(s), as defined in section 3.5.5.1. e.g. Steel, Sheet, Cold Rolled, Boron, Aluminum + Silicon coated, would be specified thus: WSS-M1A322-A3 + Aluminum Silicon coating (Boron + AlSi)
