1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2012 03 06 N Status No Usage replaced by ASTM B438 CTG-1001-K23 G. Weber, NA 2003 10 13 Revised Para 3.0 inserted; para 3.8 and 4 deleted 1963 06 24 Released F6-1069 Controlled document at www.MATS Copyright 2012, Ford Global Technolog
2、ies, Inc. Page 1 of 2 SINTERED BRONZE - MEDIUM DUTY ESF-M10A37-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a sintered bronze powdered metal. 2. APPLICATION This specification was released originally for material used for oil-impregnated, medium duty bearing
3、s. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1 CHEMICAL COMPOSITION Tin 9.0 - 11.0 Total Carbon 1.75 max Iron 1.00 max Total Other Elements 0
4、.50 max Copper Remainder 3.2 DENSITY 6.6 - 6.9 g/cm3 (ASTM B 328) 3.3 POROSITY, % volume, min 19 (ASTM B 328) 3.4 OIL CONTENT, % volume, min 17 (ASTM B 328) 3.5 IMPREGNATION OIL As per Engineering Drawing 3.6 RADIAL CRUSHING STRENGTH As per Engineering Drawing All Engineering Drawings which do not s
5、pecify a radial crashing strength carry the mandatory requirement of a radial crushing strength as calculated by using the formula: KLT2 Radial Crushing Strength, lb (N) = D-T ENGINEERING MATERIAL SPECIFICATION ESF-M10A37-A Copyright 2012, Ford Global Technologies, Inc. Page 2 of 2 where L = Bearing
6、 length, in (mm) T = Wall thickness, in (mm) D = Outside diameter, in (mm) L = Factor: 25.8 - 28.6 (177.9 - 197.2), ksi (MPa) Test Method: Radial crushing strength shall be determined by compressing the sample between two flat surfaces, the direction of the load being normal to the longitudinal axis
7、 of the sample. The point at which the load drops due to the first crack shall be considered the crushing strength. Flanged bearings shall be tested by cutting off the flange and compressing the two sections separately. Each section shall meet the minimum test requirements. 3.7 OIL COMPATIBILITY All materials used in the production of these parts shall be compatible with the impregnating oil to be used. Approval of these materials is to be determined by Product Engineering. No changes are to be made without Product Engineering approval.
