Background
The stainless steel mechanical properties depend on the specifications of the product and this helped the buyers to procure the product. The mechanical properties specified for the flat rolled products are yielding stress, tensile strength, Rockwell or Brinell hardness and elongation. For less frequency, there is a need for collision resistance such as Izod or Charpy.
The products which need yielding stress and tensile strength are tube, fittings, bar and pipe. The mechanical properties provide a guarantee and the material is used by the engineers to determine the working force or loads that the product can be safely used.
Typical Properties
The typical mechanical properties of some hard materials can be seen in the graph. One can see the elevated frozen work solidifying rate of the austenitic grades by seeing the graph and some mechanical properties of the several products. There is an increase in the yielding stress.
Yield Strength
The remarkable feature of hard austenitic stainless steel is that yield strength contains a little ratio of the tensile strength of 40-45 percent. The mild steel contains 65-70 percent of tensile strength. It is found that if there is a slight increase in the cold work, then yield also raises to a higher amount of tensile strength.
The small amount of cold work increases the yield by 300MPa or 200MPa as it can be seen in the materials like spring temper strip or wire and the yield increases to about 80-95 percent of the tensile strength. One can see various design strains for temperatures and grades from the Australian Standard AS1210 ‘Unfired Pressure Vessels’.
Ductility
Another important mechanical property of stainless steel is ductility which is calculated by one percent extension during a tensile test. Austenitic stainless steels contain high extensions of about 60-70 percent for hard products. One can allow the severe production operations like deep sketch of laundry troughs and kitchen sinks because of the grouping of high elongation and high work hardening rate.
Hardness
The strength of a material or mechanical properties of a stainless steel is hardness. This property determines the hardness of the material or product with the use of the test machines. Every machine involves a different force application system and different shaped indenter so that alteration between the scales of hardness is not very perfect. Sometimes hardness test is done to measure the hardness of the material and then it is transformed into tensile strength.
