Specific Material Considerations Metals

The following are some specific considerations that should be evaluated when applying certain metals in metal structures such as piping. 

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Creep modeling A stress-strain diagram is a significant source of data for a material. In metals, for example, most of the needed data for mechanical property considerations are obtained from a stress-strain diagram. In plastic, however, the viscoelasticity causes an initial deformation at a specific load and temperature and is followed by a continuous increase in strain under identical test conditions until the product is either dimensionally out of tolerance or fails in rupture as a result of excessive deformation. This type of an occurrence can be explained with the aid of the Maxwell model shown in Fig. 2-24. 

Binder and/or lubricant selection depends on many considerations which are specific for the particular application. The additives must be compatible with the material to be agglomerated and the proposed uses of the product. For example, for pharmaceutical or food applications no toxic materials can be selected and for agglomeration of metal-bearing dusts intended for use in steel making sulfur-containing additives are normally prohibited. Many such limitations may be defined for specific materials and applications. 

Questions that relate to specific considerations contained in company environmental guidelines apply to licensing and tolling of products (all or m part). They do not apply to suppliers of laboratory quantities of proprietary materials, raw material suppliers, or arrangements made with other companies to recover nonproprietary raw materials (for example, solvents and metal compounds). 

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