1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 02 2012 03 06 N Status No replacement or usage G. Weber, NA 2003 10 15 Revised Para 3.0 inserted; para 3.1, 3.6 and 4 deleted 1998 05 11 Activated K. Thurgood Controlled document at www.MATS Copyright 2012, Ford Global Technologies, Inc.
2、Page 1 of 2 POWDER METAL, HIGH NICKEL (5.0 - 6.0%) WSS-M10A83-B ALLOY STEEL NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an iron based material which achieves high density and improved dimensional accuracy through double pressing-double sintering. The chemical
3、 composition and high density of this material permits heat treatment to high strength levels in the core (quench and temper) and allows carburizing processes to improve surface wear characteristics. 2. APPLICATION This specification was released originally for materials used in tilt steering column
4、 lock levers. 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). 3.2 CHEMICAL COMPOSITION (Weight %) Carbon 0.2 - 0.4 Nickel 5.0 - 6.0 Molybdenum 0.4 -
5、0.6 Copper 1.20 - 1.80 Manganese 0.25 max Silicon 0.03 max Iron Balance 3.3 DENSITY 7.2 Mg/M3 min (ASTM B 328) 3.4 MECHANICAL PROPERTIES Measured on a test specimen molded to the same density and processed under identical conditions to the relevant components. 3.4.1 Tensile Strength 827 MPa min - (M
6、PIF Standard 10-63) as sintered 3.4.2 Yield Strength 689 MPa min - (MPIF Standard 10-63) as sintered 3.4.3 Elongation 2% min - (MPIF Standard 10-63) as sintered ENGINEERING MATERIAL SPECIFICATION WSS-M10A83-B Copyright 2012, Ford Global Technologies, Inc. Page 2 of 2 3.4.4 Impact Strength, Charpy As
7、 per Engineering (ASTM E 23, unnotched) Drawing/When Required 3.4.5 Compressive Strength As per Engineering (ASTM E 9) Drawing/When Required 3.4.6 Hardness As per Engineering (Required on finished parts also) Drawing/When Required 3.5 HEAT TREATMENT This material may be used as sintered or heat treated. The required condition shall be indicated on the Engineering Drawing.
