Inconel alloy

Inconel alloy 718 Inconel X [11145-80-5] Incontinence devices Indalone [532-34-3]... 

HASTELLOY alloy B-2 HASTELLOY alloy C-22 HASTELLOY alloy C-276 HASTELLOY alloy G-3 INCONEL alloy 718... 

Other alloys have been developed for use in particular corrosive environments at high temperatures. Several of these are age-hardenable alloys which contain additions of aluminum and titanium. Eor example, INCONEL alloys 718 and X-750 [11145-80-5] (UNS N07750) have higher strength and better creep and stress mpture properties than alloy 600 and maintain the same good corrosion and oxidation resistance. AHoy 718 exhibits excellent stress mpture properties up to 705°C as well as good oxidation resistance up to 980°C and is widely used in gas turbines and other aerospace appHcations, and for pumps, nuclear reactor parts, and tooling. 

Certain Inconel alloys have been used with varying degrees of success. Inconel 600 (70% Ni, 15% Cr, 15% Fe) has been employed because of its improved resistance to chloride-induced, SCC, but it has failed on occasions because of intergranular attack and general etch corrosion. 

The above results concerning the fractal dimension as functions of the solution temperature, the CPE exponent, and the depression parameter are demonstrated again in their other investigation of the effect of the anion addition on pit morphology of Inconel alloy 600 at elevated temperatures.54... 

Inconel alloy 625 —Low-cycle fatigue resistance has been increased from 70-80.000 to 110-120,000 psi at 10 cycles. This has been achieved through grain size control and improved product cleanliness. Major applications are bellows and expansion joints. 

Inconel alloy 622 —Modified composition and special thermal mechanical processing give this alloy superior thermal stability and resistance to intergranular attack and localized corrosion. The alloy is particularly suited to acidified halide environments, especially those containing oxidizing acids. 

Inconel alloy 925 —An age-hardenabte nickel-iron-chromium alloy providing high strength up to 540°C i1000 F), Developed for use in gas production applications, such as tubular products, tool joints, and equipment for surface and downhole hardware in gas industry,... 

Figure 8. Temperature dependence of the equilibrium constant, Kp = p(HtO)/ p(Ht) for the reduction of several metal oxides often present in Tokamak walls. The Kp values are calculated from thermochemical data listed in Ref. 51. The reduction curve for NiO, the most prevalent metal oxide on Inconel alloys, lies above the FeO curve, and thus is more easily reduced in hydrogen than the oxides shown. (Reproduced, with permission, from Ref. 37. Copyright 1980, North-...

When selecting a bellows valve, it is important to pay some special attention that the material selection is in accordance with the process conditions. Some SRV manufacturers use as standard bellow material INCONEL alloy 625LCF-UNS N06625 (ASME SB0443). This material is not perfect either but, compared to simple stainless steel, has an enhanced resistance to mechanical fatigue and sour gases it is commonly used in refinery FCC systems for expansion joints. 

The splitting tower is the heart of the process. Most splitting towers have the same configuration and basically operate the same way. Depending on the capacity, the tower can be 508-1220 mm in diameter and 18-25 m high and is made of corrosion-resistant material such as stainless steel 316 or Inconel alloy designed to operate at a pressure of about 5000 kPa. 

Inco (1982), Inconel Alloy MA 6000, Inco Pamphlet. Inden, G. (1993), unpublished report, Max-Planck-Institut fiir Eisenforschung, Diisseldorf, FRG. Inden, G., Pepperhoff, W. (1990), Z. Metallkd. 81, lid-113. 

To overcome this corrosion problem, nickel-based super alloys such as Inconel alloy 625 and Incoloy alloy 864 have been used. Although these alloys are more costly than stainless steel, they have shown excellent corrosion resistance in the modern automotive exhaust environment. 

D.H. Lee, J.H. Han, K.M. Kim, J.S. Kim, U.C. Lee, Effect of cold work on primary water stress corrosion cracking of Inconel Alloy 600 nuclear power steam generator tube material, Han guk Chaelyo Hakhoechi 8 (1998) 726-732. 

R. Bandy, D. Van Rooyen, Stress corrosion cracking on Inconel Alloy 600 in high temperature water—an update, Corrosion 40 (1984) 425—430. 

Bulk moduli of two Inconel alloys. The irregularities are due probably to magnetic ordering. 

The investigations of the metal release rates of Inconel 600 and Inconel 690 reported by Beslu et al. (1986) yielded results which were somewhat different from those of Lister and Davidson mentioned above. Their experiments, also using radioindicator techniques, were carried out in the Corele loop, a so-called zero release loop made almost completely of Zircaloy-4 and titanium. The equivalent penetrations of both Inconel alloys obtained by measuring the cobalt release were lower by a factor of 2 to 8 than Ae data reported by Lister and Davidson (1989), when normalized to an exposure period of 1000 hours. The measured cobalt release from Inconel 600 was hi er by about a factor of 2 than that from Inconel 690, with this difference being largely independent of the experimental conditions applied such as flow rate, temperature and solution pH. Moreover, the cobalt release rates measured by Beslu et al. (1986) did not decrease with time but remained... 

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