Stainless Steel Grade AISI 205 | UNS S20500

AISI 205 | UNS S20500 is a standard austenitic stainless steel grade. It is also called AISI Type 205 chromium-manganese-nickel steel. It provides approximately 30% higher mechanical properties such as yield strength than the traditional 304 series. It has good formability and ductility.

Stainless steel grade AISI 205 is a widely used precipitation-hardening stainless steel. It has good corrosion resistance, high hardness, viscosity and strength. In the annealed state, it is soft and ductile. This grade of metal is capable of acquiring high properties with a single precipitation or aging treatment.

Manufacturing process

AISI 205 steel is easy to machine. When machined, it produces long sticky chips. It can be machined in an annealed condition. For heat treatment, the material should be held at 1038 °C for 30 minutes and cooled to below 16 °C for complete martensitic transformation. The material can be welded using conventional fusion and resistance methods. It is not recommended to join this steel using oxyacetylene welding. The steel can be forged. Forging at temperatures below 1010 °C should be avoided.

AISI 205 stainless steel is an austenitic steel containing 16.0 - 18.0% chromium, 14.0 - 15.5% manganese, 1.0 - 1.75% nickel and 0.12 - 0.25% carbon.

The steel is non-magnetic, but may become slightly magnetized after processing in bending/deformation areas and especially after welding in the heating zone of the material.

The specific gravity of this grade of stainless steel is 7.8 g/cm³. Specific heat capacity at +20°C, J/kg*K = 500. Thermal conductivity at +20°C, W/m*K = 16.3.