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3-1 Material Strength and Stiffness 72 3-2 The Statistical Significance of Material Properties 76 3-3 Strength and Cold Work 77 3-4 Hardness 80 3-5 Impact Properties nbsp;82 3-6 Temperature Effects 83 3-7 Numbering Systems 85 3-8 Sand Casting 86 3-9 Shell Molding 86 3-10 Investment Casting 87 3-11 Powder-Metallurgy Process 87 3-12 Hot-Working Processes 87 3-13 Cold-Working Processes 88 3-14 The Heat Treatment of Steel 89 3-15 Alloy Steels 92 3-16 Corrosion-Resistant Steels 93 3-17 Casting Materials 94 3-18 Nonferrous Metals 95 3-19 Plastics 98 3-20 Composite Materials 100 |