... over 1200°F(650) after cold-drawnInspections and Tests Performed: Chemical Composition, Mechanical Properties(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Flange ... and Surface Test, Non-destructive Test, Hydrostatic Test.Surface treatment:Oil-dip, Varnish, Passivation, Phosphorization, Shot Blasting.