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                        Mechanical properties of steel

                        View: 52705/06/2017  

                        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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