Hello Shahid Ahmad,

In order to obtain a stress-strain curve for a material, it is usually necessary to perform a tensile test on a sample of the material. In a tensile test, a sample is subjected to a gradually increasing load and the resulting deformation is measured. By plotting the applied stress (force per unit area) against the resulting strain (deformation per unit length), you can obtain a stress-strain curve.

If you are unable to perform a tensile test, you can look for existing data on the material's properties. A good source for material properties is the MatWeb database (https://www.matweb.com/).

Sincerely,

Pavlo