Explain properties of structure steel. 


The properties of steel required for engineering design may be classified as 

A . Physical properties 

B . Mechanical properties 

A . Physical properties:-                                                          The Physical properties of steel are function of its  metallurgy and manufacturing process. Some of important physical properties of structure steel are listed below                                       SI.NO.   Physical properties      Magnitude    1.       Modulus of elasticity       2×10^5                                   (E)                             mpa

 2.   Modulus of Rigidity          0.769 × 10^5                      (R)                                    mpa

 3.   Poisson's Ratio           0.3-Elastic range                                                0.5 plastic range 

 4. Density or unit mass         7850 kg/m^3              of steel (Raw)   

 5. Coefficient of thermal          12× 10^-6/                  expansion                  degree celsus

 

  B. Mechanical properties:-                                         The  alloys and the heat treatment  used in the production of steel results in having different properties and strength. The mechanical properties are listen  as follows. 

  1.     Tensile  strength                                      2.     Hardness                                                   3.      Notch Toughness                               4.      Corrosion  Resistance                            5.        Fatigue strength 

          



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