9.16 Figure (a) shows the cross-sectional dimensions of a structural steel section known as C-channel with a nominal depth of 100 mm. The following are properties for the cross section: A=588 mm², Īx = 78.9 x 10¹mm, and Īy = 2.81 x 10mm*. If two of these channels are welded together as shown in Fig. (b), find Ix and Īy for the resulting cross section. 100 mm C 6.06 mm x -3.79 mm 27.39 mm (a) Fig. P9.16 (b)

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Properties of materials

A property of a material describes its characteristics and distinguishes it from the others. The material properties are described it in terms of its hardness, color, appearances, and so on. The material properties generally depend on the type of material, or whether it is a metal or an alloy. There are different kinds of material properties such as mechanical properties, thermal properties, physical properties, and chemical properties. Chemical properties describe the material in terms of a chemical change. The mechanical properties come into existence when the material is acted upon by an external load. Thermal properties are associated with the temperature of the material and specific heat.