There is also Duplex Stainless Steel in JIS specification.

The material grade is including SUS329J1, SUS329J3L, SUS329J4L, and etc. All grade is derived from AISI329.

   The Duplex contains Austenite and Freeite which both have good corrosion resistance and good strength. Besides, the price is always stable to apply in following industry:

* Chemical processing, delivery, and storage - Pressure vessels, storage tank, channels, and heat exchanger.

* Oil and Gas extraction and fabrication equipment- Channels, tank, and heat exchanger.

* Sea and other prechloride environments.

* Water treament and recycling.

* Pulp and paper industry - Marsh gas tank, bleaching apparatus, and storage-processing system.

* Ship and truck for oil tank.

* Food processing equipment.

* Biofuel plant.