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ATEX Retractor System TANKO-RT/-RTS
120/121
Translation - Operating/installation instructions 2020/01
Annexes
Material no. 1.4435 (AISI 316L)
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 proportion of molybdenum 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. 2.4607
2.4607 is the filler material for the base material 2.4602, 2.4610, 2.4819
Stainless with high corrosion resistance in reducing media and above all oxidizing media
Material no. 2.4610 (HASTELLOY® C-4 alloy)
HASTELLOY® C-4 alloy belongs to the group of highly corrosion resistant nickel-chrome-molybdenum
alloys and has good corrosion resistance even at higher temperatures.
HASTELLOY® C-4 alloy provides good resistance in reducing and oxidizing conditions, for example in
hot, contaminated media such as sulfuric acid, nitric acid, dry chlorine, formic acid, acetic acid,
solvents, chlorine and chloride media. This material is characterized by its low tendency for
intergranular corrosion, stress corrosion cracking and pitting corrosion. Due to its excellent thermal
stability HASTELLOY® C-4 alloy is extremely suitable for welding and is generally used in a welded state.
Material no. 2.4819 (HASTELLOY
®
C-276 alloy)
Nicrofer 5716 hMoW can be used in numerous chemical processes with both oxidizing and reducing
media. Its high chrome and molybdenum content make the alloy resistant to attack by chloride ions.
The tungsten content further improves this resistance. Nicrofer 5716 hMoW is one of the few materials
that is resistant to damp chlorine gas, hypochlorite and chlorine dioxide solutions. The alloy has
excellent resistance to concentrated solutions of oxidizing salts (such as iron III and copper chloride).