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      Mechanical properties of steel

      View: 54005/06/2017  

      Mechanical properties of steel


      Mechanical properties are often referred to as elasticity, plasticity, stiffness, aging sensitivity, strength, hardness, impact toughness, fatigue strength and fracture toughness.

      Elasticity: the deformation of a metal material under external force and the ability to regain its original shape when taken out of an external force.

      Plasticity: the ability of a metal material to produce permanent deformation without causing damage when subjected to external force.

      Stiffness: the ability of metal materials to resist elastic deformation when subjected to force.

      Strength: the ability of metal materials to resist plastic deformation and fracture under external force.

      Hardness: the ability of metal materials to resist stiffer objects pressed into them.

      Impact toughness: the ability of metal materials to resist fracture under impact loading.

      Fatigue strength: the maximum stress that occurs when a metal material is subjected to numerous repeated or alternating loads without causing fracture.

      Fracture toughness: the performance index used to reflect the material's ability to resist crack expansion


      Example:GB   45#  


      mechanical property

      Normalization: 850;

      Quenching: 840;

      Tempering: 600;

      Tensile strength: no less than 600Mpa;

      Yield strength: no less than 355Mpa;

      Elongation: 16[1]%;

      Shrinkage: 40%;

      Impact work: 39J;

      Steel delivery status hardness [1]:

      Hot rolled steel: less than 229HB

      Annealed steel: less than 197HB

      Component editor

      The main component is Fe (Tie Yuansu), and contains the following elements:

      C:0.42~0.50%

      Si:0.17~0.37%

      Mn:0.50~0.80%

      P: = 0.035%

      S: = 0.035%

      Cr: = 0.25%

      Ni: = 0.25%

      Cu: = 0.25%[1]

      Density 7.85g/cm3, elastic modulus 210GPa, Poisson's ratio 0.269.

        

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