1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2002 09 25 Revised Updated 1994 08 31 NE01E10127076138 Released P.Lee C. Sales Printed copies are uncontrolled Page 1 of 2 Copyright 2002, Ford Global Technologies, Inc. STEEL, MICROALLOY, BAR WSE-M1A335-A1
2、1. SCOPE The materials defined by this specification are precipitation hardening steel alloys used for high durability applications. 2. APPLICATION This specification was released originally for materials used in the manufacture of fabricated camshafts. Bearing journals may or may not be hardened, a
3、s specified on the Engineering Drawing. 3. REQUIREMENTS 3.1 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 0.10 - 0.18 Mangan
4、ese 1.45 - 1.75 Phosphorus 0.030 max Sulfur 0.030 max Silicon 0.50 - 0.70 Chromium 0.20 max Nickel 0.20 max Molybdenum 0.15 - 0.20 Vanadium 0.02 max Colombium 0.09 - 0.12 Titanium - Aluminum - Copper 0.35 max Iron Balance ENGINEERING MATERIAL SPECIFICATION WSE-M1A335-A1 Page 2 of 2 Copyright 2002, F
5、ord Global Technologies, Inc. 3.3 MECHANICAL PROPERTIES (ISO 6892/ASTM E 8M) 3.3.1 Tensile Strength, MPa 690 - 860 3.3.2 Yield Strength, MPa 345 - 520 3.3.3 Hardness, HRB 90 - 100 3.3.4 Microstructure The general microstructure in unhardened components shall display a normalized microstructure. If specified on Engineering Drawing, critical hardened areas shall consist of a tempered martensitic structure, with no acicular transformation products such as bainite permitted.
