Alloy 33 (UNS N08033/R20033)

*Similar Grade

*Product Forms

Pipe, Tube, Sheet, Strip, Plate, Round Bar, Flat Bar, Forgings, Hexagon, Wire

*Brief

Alloy 33 is a high-chromium austenitic alloy. This alloy combines ease of fabrication with outstanding resistance to highly oxidizing media such as concentrated sulphuric acid. Despite its low molybdenum content, it shows excellent resistance to localized corrosion in halide media. The nitrogen content ensures high mechanical properties with good ductility.

*Chemical Composition,%

*Typical Physical & Mechanical Property(Solution Annealed)

*Specification

*Feature

1. Excellent resistance against pitting corrosion in media containing chloride and against general corrosion in hot mineral acids, mixed acids and alkalis as well as seawater and brackish water

2. High strength and high ductility even in high temperatures

3. Good workability and welding characteristics,

4. ASME approval for pressure vessels in the temperature range from -196℃ to 450℃.

*Application

1. Heat recovery and distribution systems in the sulfuric acid production

2. Pipes and heat exchangers for sulfuric acids contaminated with chlorides

3. Vessels for storage and transport of nitric acid/hydrofluoric acid mixtures

4. Seawater conducting pipes, condensers, coolers, etc. with excellent resistance against pitting corrosion

5. Production and use of NaOH and KOH up to 70 wt.-% and max. 170℃

6. Urea solutions in the concentration range from 5 to 90 wt.-%

7. Components for the pulp and paper industry

Vessels and pipes in purified terephthalic acid (PTA) plants