309 type quality stainless steel is in the austenitic group. It contains 7% nickel in its components and therefore has a ductile and wide temperature range. It is one of the most widely used types among stainless steels and is more durable than type 304, which is one of the reasons why it is preferred.

Overview of the Properties of 309

It contains low carbon.
It has high durability in high temperature and humid environments and these factors determine its usage areas.
Resistant to oxidation up to 1100 degrees.
It shows high durability in terms of friction and has high resistance up to 800 degrees.
It can be welded, but the welding process may cause internal corrosion.
In case of continuous operation at temperatures higher than 900 degrees during the application process, it causes sigma formation, and sigma formation increases sensitivity in terms of internal corrosion.
It is suitable for use in urban, rural and maritime areas and shows durability for a long time.
In industrial use, it may rust over time because deformation is possible when exposed to acidic substances.
Fresh water and salt water resistance is high.
Another area where 309 shows durability is tensile strength and creep properties. In this sense, the overall durability score is higher than other stainless steel types.
It has high resistance to oxidation.
Another issue where 309 shows resistance is nitrogen and sulfurous gases.

Advantages

An important advantage of 309 is its cost-effectiveness. It presents a very good cost picture for the level of durability it offers.
It is completely recyclable at the end of the use process and is biological.
It is bacteria-free and easy to clean.
When compared in terms of production, it has been observed that it is in the easy production group.