Alloy iron-manganese

The copper-nickels are single-phase solution alloys, with nickel as the principal alloying ingredient. The alloys most important for corrosion resistance are those containing 10 and 30% nickel. Table 18.11 lists these wrought alloys. Iron, manganese, silicon, and niobium may be added. Iron improves the impingement resistance of these alloys, if it is in solid solution. Iron present in small microprecipitates can be detrimental to corrosion resistance. To aid weldability, niobium is added. 

The amount of iron and manganese in an alloy can be determined by precipitating the metals with 8-hydroxyquinoline, C9H7NO. After weighing the mixed precipitate, the precipitate is dissolved and the amount of 8-hydroxyquinoline determined by another method. In a typical analysis, a 127.3-mg sample of an alloy containing iron, manganese, and other metals was dissolved in acid and... 

Uranium Short-term tests indicate that the practical upper limit for niobium as a container material for uranium is about 1 400°C . Niobium is dissolved in a uranium-bismuth alloy in less than lOOh at a temperature of 800°C". Uranium eutectics with iron, manganese or nickel, corroded niobium at 800°C and 1 000°C It is significantly attacked by uranium-chromium at 1 000°C . 

A second way for a solid to accommodate a solute is interstitially, with solute atoms fitting in between solute atoms in the crystal stmcture. An important alloy of this type is carbon steel, a solid solution of carbon in iron, also shown in Figure 12-4. Steels actually are both substitutional and interstitial alloys. Iron is the solvent and carbon is present as an interstitial solute, but varying amounts of manganese, chromium, and nickel are also present and can be in substitutional positions. 

After iron, manganese is the second-most-common heavy metal. In the manufacture of steel, it extracts sulfur and other impurities from iron. As an additive in alloys (2-25 %), it imparts a unique ductility and hardness to steel. Railway junction plates are prepared from these alloys. 

Chromium iron manganese brown spinel, formula and DCMA number, 7 348t Chromium iron nickel black spinel, formula and DCMA number, 7 348t Chromium isotopes, 6 476 Chromium magnesium oxide, 5 583 Chromium manganese zinc brown spinel, formula and DCMA number, 7 348t Chromium-nickel alloys, 77 100-101 Chromium-nickel-iron alloys, 17 102-103 Chromium-nickel stainless steels, 15 563 Chromium niobium titanium buff rutile, formula and DCMA number, 7 347t Chromium(III) nitrate, 6 533 Chromium nitride, 4 668... 

Vanadium Alloys.—Vanadium alloys readily with many metals, including aluminium, cobalt, copper, iron, manganese, molybdenum, nickel, platinum, and tin, also with silicon. These alloys have hitherto received scant attention, and little is known in most cases of the systems produced. 

Iron—manganese alloy, see Ferromanganese, 4383 f Iron pentacarbonyl, see Pentacarbonyliron, 1808a Iron pyrites, see Iron disulfide, 4395 Iron—silicon alloy, see Ferrosilicon, 4384 Iron—titanium alloy, see Ferrotitanium, 4385 t Isobutene, see 2-Methylpropene, 1577 t Isobutyl acetate, 2496... 

V. A. Korshunov, and M. S. Petrushevskii Several Singularities of the Structure of Liquid Alloys of Silicon with Iron, Manganese and Chromium. S. 171 in (476). 

The most common alloy of manganese is ferromanganese. This alloy contains about 48 percent manganese combined with iron and carbon. Ferromanganese is the starting material for making a very large variety... 

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