Aluminum alloys welds

B 345 Aluminum and Aluminum-Alloy Seamless Pipe and Seamless Extruded Tube for Gas and Oil Transmission and Distribution Piping Systems B 361 Factory-Made Wrought Aluminum and Aluminum-Alloy Welding Fittings... 

Lightweight aluminum alloy welded fittings conforming to dimensions in MSS SP-43 shall have full penetration welds. 

Figure 12.44 shows the overall cross-sectional views of both the M190 weld and DP600 weld made with 2.1 s welding time. A close-up view in the bonding interface region of the M190 weld is given in Fig. 12.45. Metallurgical bonding was formed between the top and bottom workpieces around the penetrating pin. As in the case of aluminum alloy welds, the...

Ambriz, R.R., Mesmacque, G., Benhamena, A., Ruiz, A., Amrouche, A., Lopez, V.H. Fatigue Crack Growth Behaviour in 6061-T6 Aluminum alloy welds obtained by MIEA... 

Fig. 12.6 a Schematic of dendrites forming during solidification of the weld pool, b As it appears in type 1100 aluminum alloy weld (reproduced with permission of [1])... 

Uses. Alkah metal and ammonium fluoroborates are used mainly for the high temperature fluxing action required by the metals processing industries (see Metal surface treatments Welding). The tendency toward BF dissociation at elevated temperatures inhibits oxidation in magnesium casting and aluminum alloy heat treatment. 

The choice of metals for vacuum walls is largely based on the ease of fabrication of the metal, machining, cleaning (26), welding, etc. Aluminum alloys are the material of choice for out-gassing at room temperature. 

Liquid-Metal Corrosion Liquid metals can also cause corrosion failures. The most damaging are liqmd metals which penetrate the metal along grain boundaries to cause catastrophic failure. Examples include mercury attack on aluminum alloys and attack of stainless steels by molten zinc or aluminum. A fairly common problem occurs when galvanized-structural-steel attachments are welded to stainless piping or eqmpment. In such cases it is mandatoty to remove the galvanizing completely from the area which will be heated above 260°C (500°F). 

Aluminum Aluminum alloys have unusual ability to maintain strength and shock resistance at temperatures as low as —250°C (—425°F). Good corrosion resistance and relatively low cost make these alloys very popular for low-temperature equipment. For most welded construction the 5000-series aluminum alloys are widely used. These are the aluminum-magnesium and aluminum-magnesium-manganese materials. 

Offshore anodes are similar in shape to tank anodes. They are, however, much larger and weigh about 0.5 t. They are predominantly manufactured from aluminum alloys. On the basis of strength, most of them are cast onto pipes or profile iron as supports on which lateral protruding shackles are welded. The cross-section is usually trapezoidal (see Fig. 6-15). 

Microfabrication of the parallel channels was performed by mechanical surface cutting of metal tapes [31]. In the case of aluminum alloys, ground-in monocrystalline diamonds were used [45]. In the case of iron alloys, ceramic micro tools have to be used owing to the incompatibility of diamonds with that material. Such a microstructured platelet stack is provided with top and cover plates, diffusion bonded and connected to suitable fittings for the inlet and withdrawal ducts by electron beam welding (Figure 3.9). 

B 547 Aluminum and Aluminum-Alloy Formed and Arc-Welded Round Tube... 

There is an NPS 8 branch at right angles to an NPS 12 header (Fig. E-l). Both run and branch are of aluminum alloy Schedule 80 ASTM B 241 6061-T6 seamless pipe. The connection is reinforced by a ring 14 in. O.D. (measured along the run) cut from a piece of NPS 12 Schedule 80 ASTM B 241 6063-T6 seamless pipe and opened slightly to fit over the run pipe. Allowable stresses for welded construction apply in accordance with Mandatory Appendix IX, Table IX-1A, Note (28). The fillet welds have the minimum dimensions permitted in para. IP-3.4. A zero corrosion allowance is specified. What is the maximum permissible design pressure if the design temperature is -320°F ... 

Eor welds in aluminum alloy only, internal protrusion shall not exceed the following values ... 

Aluminum and Aluminum Alloys, A. L. Phillips, ed., American Welding Society, New York, 1967. 

Fans shall be of a design that has operated satisfactorily in cooling tower service for at least five years. The fans shall have a minimum of four blades of aluminum alloy, stainless steel, monel or equivalent. Plastic blades are not acceptable. Blades shall be adjustable for degree of pitch and shall be individually fastened to a hub of welded steel or cast iron (stainless steel optional at extra cost). 

The cobalt-60 source consists of 392 individually encapsulated rods (1). Each cobalt rod, which is 0.725 inch in diameter, is covered by a stainless steel jacket with welded end closures. This, in turn, is covered with an aluminum jacket (Figure 6). The doubly sealed slugs are 0.943 inch in diameter and approximately 10.7 inches long. The cobalt rods were encapsulated before activation in 1245 aluminum alloy to minimize activation... 

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