VDM® Alloy 33 (1.4591/R20033)
VDM® Alloy 33 (1.4591/R20033) is an austenitic alloy that has an excellent resistance against common corrosion and against pitting corrosion in media containing chloride due to its well-balanced analysis and extraordinarily high chromium concentration.
Characteristics of VDM® Alloy 33
VDM® Alloy 33 is characterized by:
- 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
Applications of VDM® Alloy 33
Typical applications for VDM® Alloy 33 are:
- Heat recovery and distribution systems in the sulfuric acid production
- Pipes and heat exchangers for sulfuric acids contaminated with chlorides
- Vessels for storage and transport of nitric acid/hydrofluoric acid mixtures
- Seawater conducting pipes, condensers, coolers, etc. with excellent resistance against pitting corrosion
- Production and use of NaOH and KOH up to 70 wt.-% and max. 170 °C (338 °F)
- Urea solutions in the concentration range from 5 to 90 wt.-%
- Components for the pulp and paper industry
- Vessels and piping in purified terephthalic acid (PTA) plants
Available product forms
You will find a detailed list about available product forms and sizes of VDM® Alloy 33 (1.4591/R20033) in our data sheet.
Additional information and links
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