Alloyed Aluminium

The maximum content of added elements or impurities is given in Table G.5.1 These limits are such that wrought alloys of the 2000 and 7000 series as well as castings in copper-containing alloys of the 40000 series and alloys of the 20000 and 70000 series are not deemed food-compatible. 

According to a decree of the French Ministry of Economy and Finances from August 27, 1987, anodised wrought and cast products in aluminium alloys may be used in contact with foodstuffs, if anodising has been carried out in a diluted bath containing one or more of the following acids  

Anodic coatings may be coloured by using dyestufifs and pigments that are approved as food-compatible by apphcable regulations. 

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The alloy aluminium-4 wt% copper forms the basis of the 2000 series (Duralumin, or Dural for short). It melts at about 650°C. At 500°C, solid A1 dissolves as much as 4 wt% of Cu completely. At 20°C its equilibrium solubility is only 0.1 wt% Cu. If the material is slowly cooled from 500°C to 20°C, 4 wt% - 0.1 wt% = 3.9 wt% copper separates out from the aluminium as large lumps of a new phase not pure copper, but of the compound CuAlj. If, instead, the material is quenched (cooled very rapidly, often by dropping it into cold water) from 500°C to 20°C, there is not time for the dissolved copper atoms to move together, by diffusion, to form CuAlj, and the alloy remains a solid solution. 

Almond shell Aluminium, atomized Aluminium, flake Aluminium-cobalt alloy Aluminium-copper alloy Aluminium-iron alloy Aluminium-lithium alloy Aluminium—magnesium alloy Aluminium-nickel alloy Aluminium-silicon alloy Aluminium acetate... 

Typical microstructures of the alloy-aluminium transition zones of the Al-(Fe+Ni) specimens obtained under the same conditions (temperature 700°C, dipping time 3600 sec, saturated aluminium melts) are shown in Fig. 5.16. The intermetallic layer, 80 10 pm thick, grown between a 90 mass % Fe-10 mass % Ni alloy and the aluminium melt saturated with the alloy constituents, seems to be one-phase (Fig. 5.16a). 

We have noted in Fig. 35, referring to the ternary alloy aluminium-zinc-copper, the rapid decrease in hardness with rise... 

Tests have been carried out on light alloys, aluminium-copper-magnesium, having the average composition already given and corresponding with the light alloy known as duralumin ... 

Part I is concerned with the design and preparation of vessels of mild steel, cast iron, steel alloys, aluminium alloys, concrete and of pipes and fittings. 

Whereas rigid containers can only be produced from aluminium, collapsible tubes can be produced from any of the softer metals such as aluminium, tin, lead and tin/lead alloys. Aluminium tubes must be annealed after forming and finishing, otherwise they are too springy. This process also serves to remove all traces of lubricant. 

Some SRB may cause loealized corrosion on stainless steels, nickel alloys, aluminium, zinc and copper alloys. Mechanisms of sulphur-assisted corrosion, with emphasis on Fe- and Ni-based materials, have recently been reviewed by Marcus [6.17]. The review includes the fundamentals of enhanced dissolution, retarding or blocking of passivation, and passivity breakdown. 

Cathodic precipitates are formed in Cu-alloyed aluminium, which will corrode intergranularly in polluted industrial atmospheres, in severe marine atmospheres, and in seawater. 

AISI 316 stainless steel AISI 304 stainless steel Nickel-chromium alloys Aluminium Nickel-copper alloys Nickel... 

Magnesimn-alloyed-aluminium casting Bentonite Boric acid... 

Which of the following materials are alloys aluminium, nickel, stainless steel, bronze, titanium, brass, lead, tantalum State the composition of one of them and give examples of its use as a material of construction of chemical plant. 

The sample test model consists of five piles embedded in a bi-layer soil (Fig. 26.4). The piles consist of an alloy aluminium tube (commercial model 6063-T6) with thickness t = 0.71 mm, outer diameter D = 22.23 mm and length L = 750 mm. The main properties of the aluminium tube are unit weight y = 21 kN/m, Young s modulus Ep = 70 GPa, Poisson s ratio v = 0.3, leading to bending stiffness Epip = 1.95 X 10 Nmm. Pile 3,4 and 5 are closer to each other with a relative spacing s = 10 mm sjD 3) pile 1 and 2 are placed at a distance of 140 mm. 

J. Althoff Examples of the application-orientated development of high-strength aluminium man- 1.56 ganese alloys. Aluminium Engl. Suppl. 56, E37-E39 (English transl.) (1982)... 

D. B. Goel, P. Furrer, H. Warlimont Precipitation behaviour of AIMnCuFe-alloys, Aluminium 50, 511-516 (in German) (1974)... 

E. Nes, S. Slevolden Casting and annealing structures in strip cast alloy. Aluminium 55, 319-324 (1979)... 

E. Nes, S. Slevolden The concept of a grain size diagramm in the analysis of the recrystallisation behaviour of AIMn-alloys, Aluminium 52, 560-563... 

Surface eneineerine of light alloys aluminium, magnesium and titanium alloys (ISBN 978-1-84569-537-8)... 

Lightness is the property of aluminium that first springs to mind, so much so that for a long time the term light alloy was used for what is now called aluminium alloys . Aluminium is the lightest of all common metals (Table A. 1.1). Its density is 2700 kg m , which is almost three times less than that of steel. The density of aluminium alloys ranges from 2600 to 2800 kg-m (Tables A.3.5 and A.3.9). 

Nisancioglu K., Tusvik R., Corrosion of Stripo-cast aluminium alloys. Aluminium, vol. 64, 1988, p. 407-410. 

EUdngton R.W., Design considerations for minimizing the corrosion of aluminium alloys. Aluminium Industry, vol. 5, 1986, p. 19-30. 

V MATERIAL QUANTITY N. IRONS STEEL (carbon) STEEL (tod, alloy) STAINLESS STEEL COPPER ALLOYS ALUMINIUM ALLOYS MAGNESIUM a ALLOYS ZINC a ALLOYS TIN a ALLOYS LEAD a ALLOYS NICKEL a ALLOYS TITANIUM a ALLOYS CO u 3 (L o s S g CO s s o GC IL IS i s O 1 i o s IL IS 3 < s CO g ... 

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