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Stellite corrosion resistance

Corrosion Resistance of Hastelloy Alloys, Stellite Div., Cabot Corp. [Pg.39]

The wrought version of Haynes 6B alloy has higher corrosion resistance in aqueous media than the cast and weld overlay version (Stellite 6) because of hot forging and rolling breakdown of the interconnected carbides into discrete particles. Haynes 6B can be used in sulfuric acid in the concentration range 2-77 wt % at 24°C and in dilute solutions at higher temperatures (see Table 4.50). [Pg.260]

Massive forms are in use as cast only. Finished shape can be attained by grinding, since they are not amenable to hot rolling or forging. The properties of stellite metal cutting tools are in the middle between HSS and cemented carbides. Other applications are wear and corrosion resistant parts, like pump sleeves, valves, valve seats, extrusion dies, and mill guides. [Pg.319]

Stellite 1 Possess high abrasion and corrosion resistance for applications such as pump sleeves and... [Pg.148]

The hardest and most abrasion-resistant Stellite, designed specifically for metal-cutting purposes and used in the form of tool bits, tips, milling cutter blades, etc. Also available for small solid components of simple design where maximum wear resistance is required. Possesses good corrosion resistance and the highest hot hardness. Not machinable. [Pg.149]

Stellite trademark Trade name of the Hayes Stellite Co for a family of hard and corrosion-resistant metal alloys. [Pg.700]

Boronizing for high wear resistance of carbon and alloy steels, but without appreciable corrosion resistance. Stellites, sintered cemented carbides, and some sprayed coatings can be boronized to reduce wear of their binder phases. [Pg.209]

Nickel alloys and also Stellites appear, in agreement with Douglas [122], to t)e substantially more corrosion resistant under hydrogen atmo.sphere, and several nickel alloys have appeared to be more resistant than stainless steel when exposed with it in experiments under hydrogen atmo.sphere. [Pg.259]

However, under more realistic test conditions Hancock and Islam showed that in burner rig tests with contaminant flux rates greater than about 0-1 mgcm h" the corrosion rate of nickel- and cobalt-base superalloys was largely independent of alloy composition in the temperature range 7(X)-850 C. However, in burner rig tests at 6(X) C, simulating diesel engine combustion, Saunders et reported that Nimonic 80A (20% Cr) had superior resistance to Stellite 6 (Co-28%Cr) and EN 52 (Fe-8%Cr-3%Si). [Pg.1071]

Toughness can influence the performance of materials under conditions of erosion-corrosion. The soft metals are often more susceptible to erosion corrosion because they are more susceptible to mechanical wear. The toughness is a good criterion for the resistance to the mechanical erosion or abrasion, but this is not necessarily a good criterion to predict the resistance to the erosion-corrosion. Stellite (Co-Cr-W-Fe-C alloy), which has better toughness than 18-8 stainless steel, showed better resistance to cavitation erosion on a water brake.25... [Pg.402]

Problems with steam can occur in let-down valves as a result of erosion-corrosion. To prevent attack, hard facing (e.g., stellite) is commonly used when the pressure drop exceeds 150 to 200 psi (1,035 to 1,380 kPa). This limit can be raised to 500 psi (3,450 kPa) for clean, dry steam. Corrosion-erosion also occurs in wet steam. Carbon steel is unsatisfactory in wet steam when pvx, the product of the pressure (psia), velocity (ft/s), and wetness (% water) exceeds 1 x 105. Resistance to wet steam is enhanced by increasing both the metal hardness and chromium content. [Pg.19]

In both PWRs and BWRs, corrosion of the primary circuit materials is an essential factor in the buildup of contamination layers on the surfaces of the pipes and the components. The materials used in BWRs which are in contact with the reactor water and, therefore, are potential sources of radionuclides are mainly stainless steels wear-resistant hardfacing alloys such as Stellite are also present in most of the plants. Zircaloy as the material of fuel rod claddings, spacers and fuel assembly casks need not be considered in this context, because of the extremely small release of activated constituents from this material. Due to differences in temperature and environment, the mechanisms of the corrosion process and the resulting metal release rates, which contribute to the input of corrosion products into the region of the reactor core, may show differences in different regions of the plant. Thus, corrosion of materials in the water-steam cycle exhibiting H2O phase transformations and considerable temperature differences will proceed differently than in the recirculation lines and the reactor water cleanup system, which are in contact with liquid water exclusively and show comparatively small variations in operating temperature. [Pg.341]


See other pages where Stellite corrosion resistance is mentioned: [Pg.51]    [Pg.308]    [Pg.259]    [Pg.361]    [Pg.9]    [Pg.729]    [Pg.1039]    [Pg.932]    [Pg.926]    [Pg.148]    [Pg.148]    [Pg.668]    [Pg.763]    [Pg.735]    [Pg.243]    [Pg.727]    [Pg.66]    [Pg.761]    [Pg.446]    [Pg.438]    [Pg.292]    [Pg.53]    [Pg.717]    [Pg.284]    [Pg.782]    [Pg.185]   
See also in sourсe #XX -- [ Pg.148 ]




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Corrosion resistance

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