MET 34800 - Engineering Materials Chapter 20 - IUPUI...

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MET 34800 – ENGINEERING MATERIALS IUPUI ENGINEERING TECHNOLOGY ENT Department
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CHAPTER 20 NICKEL, ZINC, TITANIUM, MAGNESIUM, AND SPECIAL USE METALS Engineering Materials: properties and selection, 9th ed. Kenneth G. Budinski, Michael K. Budinski
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20.1 NICKEL Stainless steels constitute 65% of Nickels use and 10% is electroplated. Nickel properties of density, thermal expansion, and physical properties are similar to wrought steel. Nickel has unique corrosion resistance properties, although not added to stainless for corrosion resistance. Nickel and nickel alloys are weldable. Nickel and aluminum form an intermetallic compound that if controlled during fabrication of alloys, provided excellent high temperature properties. 3
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20.1 NICKEL Pure Nickel: Nickel 200, 201, 211, 270, 210, 213. 305, and Duranickel 301. Nickel-copper alloys: Monel 400, Monel K-500. Ni-Cu alloys 410, 505, and 506. Nickel-chromium alloys: Inconel 600, 601, 7022X750, 690, 671, Incoloy 804, Nichrome. Nickel-iron alloys: Hy-mu 80, Permalloy, Ni span C, Invar, Elinvar, NiResist type 3, 5. Nickel-molybdenum alloys: Hastelloy B, B-2, N, and Chlorimet 2. Nickel-chromium-molybdenum alloys: Hastelloy C, 276, C-4, C-22, X, F, Inconel625, Chlorimet 3. Nickel-chromium-molybdenum-iron-copper alloys: Hastelloy G, G30, Inconel825. Nickel-based superalloys: Inconel 600, 601, 617, 718, X750, Udimet 500,700, Waspaloy, Hastelloy S, Mar-M-200, PS Mar-M-200. 4
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Figure 20–1 Short-term tensile strength of various alloys 20.1 NICKEL
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Table 20–2 Properties of some important nickel alloys 20.1 NICKEL
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Figure 20–2 Silicon-nickel nut 20.1 NICKEL
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Table 20–1 ACI casting designation for some nickel-based alloys (see also ASTM A 494) 20.1 NICKEL
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20.2 ZINC The largest single use of zinc is in coatings for other metals, mainly for corrosion control. The next largest category is in die casting. Zinc has a low melting point, making it easy for casting methods. Zinc has good corrosion resistance in the normal atmosphere, but has poor resistance to chemicals. 9
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Table 20–3 Commonly used die-casting alloys 20.2 ZINC
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Figure 20–3 Zinc die-casting machine; the shot plunger injects the molten metal, and ejector pins push the part from the mold when it opens 20.2 ZINC
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Figure 20–4 Zinc die-cast mechanism chassis. Note exceptional detail, ribbing, cored holes, bosses, and thin wall design for light weight. This is a good casting design.
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