Strength stainless steel screws

Strength stainless steel screws

Strength stainless steel screws

   First explain the material deformation. Deformation into elastic deformation of materials (removed to restore the original external shape) and the plastic deformation (the removal of external force to restore the shape, shape change)

Some steel products (such as high carbon steel) has no obvious yield phenomenon, usually occurring trace amounts of plastic deformation (0.2%), the stress as the steel yield strength, yield strength as the conditions (yield strength).

    When the stress exceeds the elastic limit, the deformation increased rapidly, this time in addition to produce elastic deformation, but also produce some plastic deformation. When the stress reaches the point B, the plastic strain increased dramatically, curve of a wave of small platforms, a phenomenon known as the yield. This phase of the maximum and minimum stress are called the yield point and lower yield point. Since the next yield point value is more stable, and therefore resistance to it as material indicators, known as the yield point or yield strength (σs or σ0.2).

    (1) The phenomenon of apparent material yield, the yield strength is the stress at the yield point (yield value); (2) is not obvious for the yield of material, and the stress - strain the limits of deviation of the linear relationship between the required value (usually 0.2% of permanent deformation), the stress. Commonly used as the mechanical properties of solid materials, mechanical evaluation, the actual use of the material limit. Because the materials produced after yielding necking, strain increases, and the material lost its original function.