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 Stainless steel grades and their international equivalents

Mechanical Properties of Stainless Steel

Required mechanical properties are normally given in purchase specifications for stainless steel. Minimum mechanical properties are also given by the various standards relevant to the material and product form. Meeting these standard mechanical properties indicates that the material has been properly manufactured to an appropriate quality system. Engineers can then confidently utilise the material in structures that meet safe working loads and pressures.

Yield Strength of Stainless Steel

Unlike mild steels, the yield strength of annealed austenitic stainless steel is a very low proportion of the tensile strength. Mild steel yield strength is typically 65-70% of the tensile strength. This figure tends to only be 40-45% in the austenitic stainless family.

Ductility of Stainless Steel

The combination of high work hardening rates and high elongation / ductility makes stainless steel very easy to fabricate. With this property combination, stainless steel can be severely deformed in operations like deep drawing.