1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions Rev 03 2011 12 15 N Status No Usage S. Ryzyi, NA 2002 08 29 Revised Updated and renumbered 1989 11 01 SM/ER4345TC Released G.Lane, N.Riley, EAO. R.Graham, NAAO Controlled document at www.MATS Page 1 of 2 Cop
2、yright 2011, Ford Global Technologies, Inc. NODULAR CAST IRON - SILICON, MOLYBDENUM WSD-M1A316-A ALLOYED NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an annealed nodular cast iron alloyed with a nominal 4 % silicon and 1 % molybdenum. 2. APPLICATION This speci
3、fication was released originally for material used for exhaust manifolds requiring high temperature strength and resistance to oxidation. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Pr
4、oduction Materials (WSS-M99P1111-A). 3.2 CHEMICAL COMPOSITION (Weight Percent) Total Carbon 3.0 to 3.8 Silicon 3.5 to 5.0 Manganese 0.7 max Phosphorus 0.04 max Sulphur 0.02 max Molybdenum 0.5 to 1.25 Magnesium As Required Specific composition limits and foundry practice to meet performance and manuf
5、acturing requirements will form part of an agreed Control Plan. 3.3 MECHANICAL PROPERTIES (ASTM E 8M/ISO 6892) Test bars shall be separately cast and heat treated with components. Tensile Strength, min 500 MPa 0.2 % Proof Stress, min 400 MPa Elongation, min 5 % ENGINEERING MATERIAL SPECIFICATION WSD
6、-M1A316-A Page 2 of 2 Copyright 2011, Ford Global Technologies, Inc. 3.4 HARDNESS 192 - 262 HB (ASTM E 10/ISO 6506) Checking location shall be specified on the Engineering Drawing. 3.5 MICROSTRUCTURE (ASTM A 247) The location of the microstructure may be as specified on the Engineering Drawing. Grap
7、hite Morphology, min 90 % Types I & II Graphite Size 6 and 7 Matrix microstructure shall consist predominantly of ferrite with a maximum of 25 % pearlite and a maximum of 4 % finely dispersed carbides. The graphite morphology, size and matrix microstructure content may be measured by estimation, com
8、parison to available industry charts or by quantitative methods (ASTM E 562 or approved image analysis techniques). In case of dispute, the quantitative metallurgical method will be the umpire method. 3.6 HEAT TREATMENT Castings produced to this specification shall be annealed. The annealing process
9、 will depend upon the part design and shall be part of the Control Plan. 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 4.1 Modulus of Elasticity, GPa 150 - 170 4.2 Coefficient of Thermal Expansion Coefficient (10E-6/C) Temp. Range (C) 11.4 20 - 200 12.1 20 - 540 13.3 20 - 815
