Container Cleaning System TANKO®EX-R64T
Annexes
Translation - Operating/installation instructions 2020/03
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Annex 2: Corrosion Resistance of Steels (Excerpts from Data Sheets)
Material no. 1.4401 (AISI 316)
The corrosion resistance of 1.4401 is significantly better than that of stainless steel grades 1.4301 and
1.4307, particularly when chlorides are also present, thanks to the addition of 2 - 3% molybdenum.
1.4401 has excellent corrosion resistance in natural environmental media (water, rural and urban
atmospheres), as well as in industrial sectors with moderate chlorine and salt concentrations, in the
food industry and the agricultural food sector.
Due to its relatively high carbon content it must be taken into account that 1.4401 is not resistant to
intergranular corrosion. Furthermore, it should also be pointed out that 1.4401 is not resistant to sea water.
Material no. 1.4404 (AISI 316L)
The corrosion resistance of 1.4404 is significantly better than that of stainless steel grades 1.4301 and
1.4307, particularly when chlorides are present, thanks to the addition of 2–3% molybdenum.
1.4404 has excellent corrosion resistance in natural environmental media (water, rural and urban
environments), as well as in industrial sectors with moderate chlorine and salt concentrations, in the
food and pharmaceutical industry and in the agricultural food sector. Due to its low carbon content
1.4404 is even resistant to intergranular corrosion after welding.
1.4404 is not resistant to sea water!
Material no. 1.4430
1.4430 is the filler material for the base materials 1.4404 and 1.4435.
Material no. 1.4435 (AISI 316 L)
1.4435 has excellent corrosion resistance in natural environmental media (water, rural and urban
environments), in industrial sectors with moderate chlorine and salt concentrations, as well as in the
food industry and the agricultural food sector. In addition, this grade is also resistant to various acidic
media. As this material is also resistant to intergranular corrosion after welding, it complies with the
following standardized test procedures:
DIN EN ISO 3651-2
The higher molybdenum level in 1.4435 compared to 1.4404 makes it significantly more resistant to
reducing acids and chloride media.
Material no. 1.4571 (AISI 316Ti)
1.4571 has good resistance to corrosion in most natural waters (urban and industrial), provided that
the concentrations of chloride, salt, hydrochloric acid and organic acids are low to medium. 1.4571 has
excellent corrosion resistance both in the food and beverage industry, as well as in the agricultural food
sector.
As this grade is also resistant to intergranular corrosion after welding, it complies with the following
standardized test procedures:
DIN EN ISO 3651-2
Material no. 1.4576
1.4576 is the filler material for the base material 1.4571
Material no. 2.4602 (HASTELLOY® C-22™ alloy)
HASTELLOY® C-22™ alloy also provides good resistance to liquid media, such as sulfuric acid,
phosphoric acid, nitric acid, chlorine gas, acidic mixtures consisting of sulfuric acid and oxidizing acids
