31 What is the difference between a rectangular bar section

31. What is the difference between a rectangular bar section and a plate? 32. What are the three preferred types of steel for shapes in the construction industry? 33. What effects does the addition of carbon have on steel? Name three elements that improve the corrosion resistance of steel. 35. What grade of steel is most commonly used today in the production of W-shapes, and what are its yield stress and tensile stress? 36. What grade of steel is most commonly used today in the production of round HSS? Rectangular HSS? 37. What are the differences between an A500 Grade C rectangular HSS and an A1085 rectangular HSS? 38. What grade of steel is preferred for the fabrication of most structural shapes other than W-shapes, and what are its yield stress and tensile stress? (Hint: See Figure 3.10.)

Solution

31) Rectangular bar section has the(b*d) has other section which is length will be large.

But for rectangular plate(b*d) has other section which is thickness is very less compared to b and d.

32) TYpes of steel: Low carbon steel, high carbon stell, stainless steel.

33) If carbon percentage is increase in steel, it increases the strength and hardness but it decrease the ductility ( yield palateau) of the member and it reduce the machineability.

34) Chromium is the corrosive resistance of the steel. If it is present in steel, it is called stainless steel. It will not corrode.