Castings, aluminum

Prior to its addition to the aluminum casting alloys, the strontium metal is usually alloyed into the form of a master alloy. These master alloys are typically 10% Sr—90% A1 or 90% Sr—10% Al, and improve the dissolution and handling characteristics of strontium in the foundry. 

In aluminum castings, integral corrosion-resistant steel inserts may be used. An example is shown in Figure 2.3. 

Figure 2.3. Example of a corrosion-resistant steel insert used in an aluminum casting.

Steam-heated aluminum castings are used for the melt spinning of nylon and polyester fibers and have been used for storage of raw materials during manufacturing, as well as for storage of acetic acid in cellulose acetate plants. 

Aluminium, n. aluminum, aluminium, -blech, n. sheet aluminum, -bor, n. aluminum boride, -draht, m. aluminum wire, -eisen, n. ferro-aluminum. -erz, n. aluminum ore. -feilspane, m.pl. aluminum filings, -fluorwasserstoff-saure, /. fluoaluminic acid, -folie, /. aluminum foil, -formiat, n. aluminum formate, -giesserei, /. aluminum foundry or founding. -griess, m. (coarse) aluminum powder aluminum shot. guss, m. aluminum cast-ing(s), cast aluminum. 

Proprietary systems are available employing Lego type blocks which can be constructed and placed on a baseboard to represent a three-dimensional visualization of the layout. Another system employs aluminum castings of the actual items of equipment and operatives. Cardboard cutouts have been the most commonly used method, particularly with those who rarely plan layouts. 

Aluminum Casting Copper and Alloy Casting Magnesium Casting Zinc Casting... 

The gel block (Figure 3) consists of an aluminum casting 48 inches long by 4 inches wide by 1 inch deep with electrical heating elements at one end and facilities for water cooling, if required, at the other end. The block is lagged and is fitted with... 

Commercial tert.-butyl alcohol dried over calcium oxide is suitable for this preparation. Aluminum isopropoxide or ethoxide 2 may be used in place of the aluminum /er/.-butoxide to remove traces of water. The grade of metal known as fast cutting rods has proved most satisfactory. The checkers used turnings made from aluminum cast from melted-down kitchen utensils. Aluminum ferf.-butoxide has also been prepared successfully in another laboratory from commercially pure aluminum (2S) and from rods of the alloy 17ST (communication from L. F. Fieser). The checkers were able to obtain considerably higher yields of the butoxide from pure aluminum than from a copper-bearing alloy. 

TABLE 3. NOMINAL CHEMICAL COMPOSITION1 AND TYPICAL PROPERTIES OF SOME ALUMINUM CASTING ALLOYS... 

Staff Advances in Aluminum Custing Technology Proceedings from Material Solutions Conference 9H on Aluminum Casting Technolagr. ASM llllemaliunal. Materials Park, OH. 1998. 

Aluminum casting subcategory Applicability Yes 40 CFR 464, Subpart A EPA 1985c... 

Some nominal chemical composition of aluminum cast alloys and their tensile properties are listed in Table 4.22 and 4.23, respectively. 

Table 4.22 Nominal chemical composition of representative aluminum casting alloysa...

Table 4.23 Typical tensile properties of representative aluminum casting alloys in various tempers3...

Since the in-mold pressures in RIM are generally relatively low [50 to 150 psi (0.4 to 1.1 MPa)] a variety of tooling constructions have been used. These include machined steel or aluminum, cast aluminum or kirksite, sprayed metal or electroplated shells, and reinforced or aluminum filled epoxy (Chapter 17). With mold pressures usually below 100 psi (0.7 MPa), mold-clamp-pressure requirements can accordingly be low when compared to injection and compression molding. 

Aluminum, cast-hammered 2.55-2.80 165 Apple 0.66-0.74 44 Granite, syenite, gneiss 1.9-2.3 130... 

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