Alleima 2RE10
Alleima® 2RE10 is an austenitic stainless steel with extremely low carbon and impurity contents.
Standards:
– UNS: S31002
– EN Number: 1.4335
– W.Nr.: 1.4335*
– DIN: X 1 CrNi 25 21*
* Obsolete. Replaced by EN.
Product standards
– ASTM A213 and A312
– EN 10216-5
– SEW 400 (Feb 1991)
Alleima® 2RE10 conforms to EN no. 1.4335, but actual composition specified for EN no. 1.4335 allows considerable higher maximum levels of C, Si, P, S and Mo. High levels of these elements increase the potential for corrosion and have therefore been kept as low as possible in Alleima® 2RE10.
Approvals
– ASME BPV Code, Section VIII, Divsion 1.
Aplications:
Alleima® 2RE10 is very suitable for heat exchanger tube and pipe in processes that treat nitric acid, for example, the manufacture of nitric acid, acrylic fibres, ammonium nitrate and the reprocessing of nuclear reactor fuel.
Extensive practical experience in such applications has confirmed the superiority of Alleima® 2RE10 over standard steels such as ASTM 304L and ASTM 329.
Tail gas preheaters
The main reason for highly corrosive conditions in tail gas preheaters is that droplets of nitric acid are entrained in the tail gas from the absorption tower. When this gas enters the heater, the droplets settle on the hot tube wall and start boiling. The temperature of the heating medium, usually hot process gas or steam, can be very high. In this type of condition, ASTM 304L tends to have a short service life. Tubes and tube sheets manufactured in Alleima® 2RE10 are recommended for a long service life
Cooler/condensers
In cooler/condensers, corrosion is normally encountered at the inlet end, where the first condensate is formed. If reboiling of the first condensate occurs, the corrosive conditions become very severe, leading to the kind of attack illustrated in figure 5. This typical corrosion problem can be detected easily. By upgrading to Alleima® 2RE10the service life will be substantially longer than, for example, ASTM 304L.
ACEROS TITANIUM no garantiza la exactitud de la información contenida en este documento y recomienda que los usuarios investiguen en profundidad aspectos técnicos y especificaciones antes de realizar una compra. Esta información técnica ha sido recompilada de diversas fuentes en línea, incluyendo Alleima, Ovako y Roxon entre otras. Esta ficha técnica ha sido proporcionada solo para fines informativos y no ha sido verificada de forma independiente por ACEROS TITANIUM CHILE LTDA.