1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions Rev 03 2011 12 15 N Status No usage S. Ryzyi, NA 2003 03 13 Revised Para 3.0 inserted ; Para 3.1, 3.6, 3.7, 4 deleted 1982 01 12 Released, CESL-RD863100-E42 E. Price Controlled document at www.MATS Page 1 of
2、 2 Copyright 2011, Ford Global Technologies, Inc. GRAY CAST IRON, PERMANENT MOLD ESE-M1A265-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is gray cast iron poured into permanent (cast iron) molds to produce castings with good machinability and high strength at m
3、oderate hardness level. 2. APPLICAION This material was released originally for material used to make automotive engine water pump pulley hubs. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIAL
4、S Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 CHEMICAL COMPOSMON (TYPICAL) Total Carbon 3.45 - 3.65 Silicon 2.45 - 2.65 Manganese 0.60 - 1.00 Phosphorus 0.35 max Sulfur 0.15 max Iron Balance 3.3 HEAT TREATMEN
5、T All part and test bar castings shall be cast in permanent (cast iron) molds and shall be normalized at approximately 1650 F (900 C) in a continuous furnace and light air blow cooled. ENGINEERING MATERIAL SPECIFICATION ESE-M1A265-A Page 2 of 2 Copyright 2011, Ford Global Technologies, Inc. 3.4 HARD
6、NESS - BRINELL (ASTM E 10 -10 mm ball and 3000 kg load) 3.4.1 As-Cast Surface 163 - 229 At location indicated on part engineering drawing, minus the 0.010-0.030 in (0.25-0.76 mm) normally removed by grinding to prepare the area for Brinell hardness testing. 3.4.2 Machined Surface, min 143 actual Not
7、e: Normal distribution statistical analysis minus 3 sigma limit does not apply. At location indicated on part engineering drawing, when specified, 0.5 in (12.5 mm) min from edges. 3.5 TENSILE STRENGTH, min 35,000 psi (241 MPa) Mechanical properties shall be determined per ASTM A 48 on a 0.505 in (12
8、.8 mm) diameter test bar, machined from a 0.875 in (22.2 mm) diameter permanent mold cast and normalized bar, at a minimum frequency of once per month. Note: For part design analysis tensile strength in the actual part, depending on section size and microstructure, may be typically 25,000 psi (172 M
9、Pa) at the lower hardness limit. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. The following microstructure has been found most suitable. The indicated microstructure is not to be used as a basis for
10、 rejection; however, it can be used to support functional rejection. The matrix structure of permanent mold gray cast iron parts in the normalized condition shall be predominantly ferrite, with 5% minimum pearlite, no massive cementite and free of abnormal segregation. The graphite per ASTM A 247 sh
11、all be evenly distributed and shall be present in the form of predominantly interdendritic random orientation Type D flake - Size 6 to 8 at the as-cast surface. Graphite may have diminishing amounts of Type D and up to 100% random orientation Type A - Size 4 to 6 at the casting center and at machined surfaces.
