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Cold Upsetting Steel
Quality Difficulties in Cold Upsetting Steel Processing
Selection of hot rolled steel products
Selection of hot rolled steel products

Nomenclature of mechanical properties

Nomenclature of mechanical properties

Naming of 6 mechanical properties

  1. mechanical properties: the mechanical properties of steel plate refers to the properties related to elastic or inelastic response or stress-strain relationship under the force of steel plate. Tensile strength, yield point, elongation and impact absorption work are the main indicators of the mechanical properties of hot-rolled steel. Its size indicates the size of the steel’s ability to resist various effects, is the main criterion for assessing the quality of steel materials, but also the main basis for the design of steel parts and strength calculations.
  2. mechanical properties experiments: the determination of the mechanical properties of hot-rolled steel plate experiments are mainly tensile test and impact test.
  3. yield strength: specimen in the tensile process, the load does not increase or begin to decrease and the specimen can continue to elongate (deformation) when the stress. The lower the yield strength of steel, the smaller the force required to produce permanent deformation, that is, the easier to shape processing.Nomenclature of mechanical properties
  4. tensile strength: when the specimen is stretched, the maximum stress sustained before pulling off. When the material is subjected to external stress greater than its tensile strength, will rupture, therefore, the greater the tensile strength of the steel material, the more it can withstand the large external stress without fracture.
  5. elongation: the specimen is pulled off, the length of the increased part of the mark with the original mark length of the percentage. The greater the ratio of elongation, it means that the material can withstand permanent deformation before the destruction of the force (plasticity) the better; vice versa, the worse the plasticity.
  6.  impact work (impact absorbed work): impact test, the specified shape and size of the specimen in the impact of a break in the work absorbed, the size of the impact work, that the metal material resistance to impact loading. The higher the impact work, the stronger the ability of the material to resist sudden brittle fracture.Nomenclature of mechanical properties
automotive steel sheets
  1. Elastic deformation: material deformation under the action of external forces, when the external force can be removed, the material deformation can disappear and can fully restore the original shape of the property is called elastic.
    Deformation can disappear and can completely restore the original shape of the nature of the called elastic. This recoverable deformation is called
    is called elastic deformation.
  2.  E: modulus of elasticity, characterizing the resistance of the material to elastic deformation. 
  3.  elastic specific work: the ability of a unit volume of metal material to absorb the work of elastic deformation, also known as
    elastic specific strain energy.
  4. proportional limit of p: stress and should become a linear relationship between the maximum stress.
  5. elastic limit (e: the transition from elastic deformation to elastic plastic deformation of stress.
  6. Mechanical properties indicators: reflect the ability of certain mechanical behavior of the material to occur or the size of the resistance.
  7.  Hysteresis: the elastic range after rapid loading or unloading, with the extension of time to produce additional elastic
    The phenomenon of additional elastic strain over time.
  8. cyclic toughness: refers to the ability to absorb irreversible deformation work under alternating load.
  9. Bauschenberg effect: metal material after pre-loading a small amount of plastic deformation, after unloading
    After unloading, the residual elongation stress increases; the reverse residual elongation stress decreases.
  10.  Bauschinger strain: given the stress, forward loading and reverse loading of the strain difference between the two stress a strain curve.
  11.  plasticity: the ability of a metal material to undergo irreversible permanent (plastic) deformation before fracture. 
  12. solid solution strengthening: the addition of solute atoms in pure metal to form a solid solution alloy, will significantly increase
    Yield strength, this is the solid solution strengthening.
  13.  toughness: toughness refers to the ability of the material to absorb the work of plastic deformation and fracture work before fracture.Nomenclature of mechanical properties