1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2013 05 06 N Status A1/2/3 no direct replacement, use CBP Strategy D. Rhuno, NA 2005 02 15 Activated R. Starbowski Controlled document at www.MATS Copyright 2013, Ford Global Technologies, LLC Page 1 of 3 STEEL, SHEET, HOT ROLLED, LOW CARBON
2、WSS-M1A356-A1 (NORTH AMERICAN APPLICATIONS) STEEL, SHEET, HOT ROLLED, LOW CARBON WSS-M1A356-A2 (NORTH AMERICAN APPLICATIONS) STEEL, SHEET, HOT ROLLED, LOW CARBON WSS-M1A356-A3 (NORTH AMERICAN APPLICATIONS) NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by these specifications is a low c
3、arbon steel sheet suitable for cold forming. WSS-M1A356-A1 CQ WSS-M1A356-A2 DQ WSS-M1A356-A3 DDQ Specification WSS-M1P94-A shall be used where pre-coating by the steel supplier is required. 2. APPLICATION These specifications were released originally for automotive body and chassis parts. A range of
4、 formability exists between Variants A1 through A3. Variant A1 is used for simple to form parts, i.e., brackets. Variants A2 and A3 are used for higher formability applications, coated or uncoated. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part produce
5、rs must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 CHEMICAL COMPOSITION (WEIGHT PERCENT) The upper and lower limits of chemical composition of the controlled elements shall be established by the supplier and be included in the control plan. ENGINEERI
6、NG MATERIAL SPECIFICATION WSS-M1A356-A1/A3 Copyright 2013, Ford Global Technologies, LLC Page 2 of 3 3.3 MECHANICAL PROPERTIES (ASTM E 8M, Longitudinal Tensile Specimens 50 mm Gauge Length) The material shall be steel sheet suitable to form the part and be suitable for assembly. VARIANTS A1 A2 A3 Yi
7、eld Strength (0.2% offset), MPa 180 380 180 290 180 - 240 Tensile Strength MPa min N/R 270 270 Total % Elongation min N/R 34 38 n Value min (10 - 20%) N/R 0.16 0.18 N/R = Not Required 3.4 THICKNESS AND THICKNESS TOLERANCE The thickness specified on the Engineering Drawing shall be a minimum. Unless
8、otherwise specified by Ford via the Engineering Drawing, the SMRL (see para 3.5) or Purchasing, the tolerance range on thickness shall comply with ES-YC15-1N260-AC. 3.5 FORMABILITY The quality level of steel (including internal cleanliness) supplied to fabricate a specific component shall be negotia
9、ted 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 quality level and will form that part satisfactorily as defined by the m
10、anufacturing activity. Ford Motor Company may, at its option and in agreement with the steel supplier, compile a list of property requirements such as mechanical properties, forming characteristics and surface texture, for each specific part. This list will be a mandatory extension of these specific
11、ations. The current responsible area within Ford North America is Advanced Technology and Material Engineering (AT also the coating(s) defined by WSS-M1P94-A. e.g. Steel, Sheet, Hot Rolled, Low Carbon, uncoated, would be specified thus: Steel to WSS-M1A356-A2: Class 3 e.g. Steel, Sheet, Hot Rolled, Low Carbon, coated with double sided Hot Dipped Zinc, would be specified thus: Steel to WSS-M1A356-A2, coated to WSS-M1P94-A: 60G60G-HD, Class 3
