2.4858 – Alloy 825 – N08825
Available from stock !
UR™ 825 is an austenitic Ni - Fe - Cr - Mo - Cu nickel based alloy developed to resist corrosion in very aggressive media.
The high level of nickel, molybdenum and copper induces an improvement of the corrosion resistance in reducing environment compared to standard stainless steels.
|> EURONORM :||EN 2.4858||Ni Cr21 Mo|
|> ASTM :||UNS N08825|
|> ASTM :||B 424|
|> ASME :||SB-424|
Sulfuric acid :
UR™ 825 is highly resistant to sulfuric acid (all concentrations) at temperatures below 65°C (150°F) and until boiling temperature for concentration to 40%.
Its corrosion resistance is enhanced by the presence of oxidizing salts.
Phosphoric acid :
UR™ 825 well resists to pure phosphoric acid until boiling temperature for concentrations up to 85%.
Nitric acid :
UR™ 825 has a good behavior in nitric acid to concentrations up to 65%. This behavior is lower in the presence of fluorhydric acid.
Chlorhydric acid :
UR™ 825 is susceptible to corrosion when the chlorhydric acid concentration is higher than 20%.
This grade is mainly used for construction vessels, tubes, forgings or sheets used in seawater, sulphuric and nitric acids (particularly for pickling vessels), phosphoric acid and other aggressive media.