Alloy composition table

Besides alloy composition (Table 2-19), the corrosion behavior of titanium in reducing acids is very dependent on acid concentration, temperature, and impurities in the acid (Schutz and Thomas, 1987). Anodic polarization curves of titanium in sulfuric acid solutions showed that the critical current for passivation at fixed temperature increased with the acid concentration (Levy, 1967 Peters and Myers, 1967) and with temperature at a given acid concentration (Levy, 1967). Fig. 2-29 shows the rates of corrosion of Ti Gr 2 and other alloys as a function of the concentration of pure hydrochloric acid at the boiling temperatures. As the acid concentration increases the rate of corrosion of Ti Gr 2 increases rapidly. 

Numbering System and the Unified Numbering System (UNS) that were developed by ASTM and SAE to apply to all commercial metals and alloys, define specific alloy compositions. Table 5.1 through Table 5.3 provide a comparison between ASI and UNS designation for stainless steels. 

LI ANSWER 1 OF 2 COPYRIGHT 1994 GMELIN Alloy Composition Table Component W A ... 

Table 13. High Temperature Eutectic Alloy Compositions...

Table 8 indicates the compatibiUty of magnesium with a variety of chemicals and common substances. Because the presence of even small amounts of impurities in a chemical substance may result in significantly altered performance, a positive response in the table only means that tests under the actual service conditions are warranted (132). Other factors which may significantly alter magnesium compatibiUty include the presence of galvanic couples, variations in operating temperatures, alloy composition, or humidity levels. 

Table 5. Alloy Composition of High Temperature Steels...

Alloy Compositions and Product Forms. The nominal compositions of various cobalt-base wear-resistant alloys are Hsted in Table 5. The six most popular cobalt-base wear alloys are Hsted first. SteUite alloys 1, 6, and 12, derivatives of the original cobalt—chromium—tungsten alloys, are characterized by their carbon and tungsten contents. SteUite aUoy 1 is the hardest, most abrasion resistant, and least ductile. 

Alloy Compositions and Product Forms. SteUite 21, an early type of cobalt-base high temperature alloy, is used primarily for wear resistance. The use of tungsten rather than molybdenum, moderate nickel contents, lower carbon contents, and rare-earth additions typify cobalt-base high temperature alloys of the 1990s as can be seen from Table 5. 

Table 7 gives the composition of gold alloys available for commercial use. The average coefficient of thermal expansion for the first six alloys Hsted is (14-15) X 10 j° C from room temperature to ca 1000°C two opaque porcelains used with them have thermal coefficient expansion of 6.45 and 7.88 X 10 from room temperature to 820°C (91). The HV values of these alloys are 109—193, and the tensile strengths are 464—509 MPa (67-74 X 10 psi). For the last four alloys in Table 7, the HV values are 102—216, and the tensile strengths are 358—662 MPa (52-96 x 10 psi), depending upon thermal history. 

Current content values Q and Q" for the most important anode metals are given in Table 6-1. These data apply only to pure metals and not to alloys. For these the Q values corresponding to the alloy composition can be calculated from ... 

In addition to the alloys in Table 4.21, Ni-Sn and Ni-Ti alloys also possess useful corrosion resistance. Ni-Sn alloys are extremely brittle and, because of this, are used only as electrodeposited coatings. Ni-Ti alloys over a wide range of compositions have been studied, of which perhaps the intermetallic compound NiTi (55 06Ni-44-94Ti) has attracted the most interest. 

Typical alloy compositions are reported by Hochmann etal. (Table 8.2) . Molybdenum or copper is added to some of the alloys. 

With due regard to the lateral variations in composition which can arise as a consequence of source geometry and positioning (discussed in Section II), it is vise to analyze the alloy film at a number of representative points. For example, if a catalytic reaction was carried out over an alloy film deposited inside a spherical vessel maintained at a constant temperature over its entire area, then the mean alloy composition (and the uniformity of composition) is required. A convenient procedure is to cut glass reaction vessels carefully into pieces at the end of the experiment and to determine the composition by X-ray fluorescence analysis of a number of representative pieces. Compositions of Pd-Ag alloy films (40) determined at 12 representative parts of a spherical vessel from the intensities of the AgK 12 and PdKau fluorescent X-ray emissions are shown in Table V mean compositions are listed in the first column. (The Pd and Ag sources were separate short concentric spirals.) In other applications of evaporated alloy films to adsorption and catalytic studies, as good or better uniformity of composition was achieved. Analyses of five sections of a cylindrical... 

The flame retardant performance of various flame retardant additives in a commercial polycarbonate/ABS alloy were compared. No antimony oxide was required. The data shows brominated phosphate to be a highly efficient flame retardant in this alloy (Table XI). An alloy composition containing 14% brominated phosphate and no antimony oxide gives a V-0 rating (Table XII). The melt index of this alloy containing 12% brominated polystyrene was 7.6 g/10 min. (at 250°C) the equivalent resin containing brominated phosphate had a melt index of 13.3 g/10 min. 

Typical pressure-composition isotherms for the LaNi5-H2 system are shown in Figure 2 (14). From plots of In Pplateau vs- 1 / T, several workers determined the experimental heats and entropies of Reaction 1. The enthalpies are the heats of formation for the /J-phase hydride from the a-phase hydrogen-saturated alloy (see Table I). 

Substituting into the formula (30) the numbers m, mu m2, m3, lu l2, h from Table 1 and known formulae for probabilities (7), we find the solubility of interstitial impurity in alloy of each structure correspondingly for octa-and tetrahedral interstitial sites in dependence on alloy composition, temperature and degree of long-range order. 

TABLE 2 summarises elastic constants and lattice constants for each binary compound [20-23]. Determination of the alloy composition by this method depends strongly on the preciseness of the elastic constants. Elastic constants of AIN and GaN have been measured precisely by Brillouin scattering [21-23] measurement, while those of InN are not known as accurately. In TABLE 2, calculated results [23] are also shown for comparison. 

A9.2 Measurement of alloy content in GaN and related materials TABLE 1 Alloy compositions calculated by XRD and EPMA. 

The properties of skeletal Cu-Zn catalysts depend on the composition of the precursor alloy, the composition of the leach solution, and the temperature and time of leaching. Table 6 shows the properties of catalysts used by Friedrich et al. [26]. The leaching conditions used to prepare the catalysts were 323 K, 40wt% NaOH, and sufficient time for complete reaction of the Zn and Al with the NaOH. Thus, the catalysts were fully leached. Table 6 shows that by replacing copper by zinc in the precursor alloy catalysts with increased BET surface areas, decreased pore volumes, decreased pore diameters, and decreased copper crystallite sizes are produced. It also shows the effect of the precursor alloy composition on the surface and pore properties of the catalysts. 

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