Below are the most frequently asked questions about Sanicro® 25 high-alloy austenitic stainless steel.
Sanicro® 25 is a high-performance austenitic tube material developed for superheaters and reheaters in advanced coal-fired power boilers for material temperatures up to around 700°C (1290°F).
Sanicro 25 was designed for high strength at elevated temperatures. It has very good high-temperature oxidation resistance and steam oxidation resistance. Sanicro 25 also has very good resistance to corrosion in environments with coal ash.
Test results indicate that Sanicro 25 has higher creep strength than any other known commercial austenitic material. Sanicro 25 is also characterized by high oxidation resistance, high structural stability and good fabricability.
Tubes in Sanicro 25 can be supplied hot- or cold-worked, solution annealed and white pickled.
As filler metal for gas-shielded arc welding, wire in Sanicro® 53 or alloy 617 mod. is recommended. Contact us for more information.
The following approvals are available for Sanicro® 25:
UNS number S31035 was entered in the UNS database in November 2007 with cross reference to ASTM A213 and A312.
In August 2004, trial tubes in Sanicro® 25 were installed in the RWE plant in Weisweiler, Germany and in the Dong Energy plant in Esbjerg, Denmark. In July 2005 this was followed by a larger installation in the E.ON plant in Scholven (project COMTES 700), Germany. Sanicro® 25 is being tested in material temperatures between 650 and 700°C (1290°F). Feedback so far is very promising.
|Vattenfall Boxberg||2008–continuing||Hitachi Power|
|E.ON, Scholven (COMTES 700)||2005–2009||Hitachi Power|
|Dong Energy, Esbjerg||2004–2009||Alstom|
|RWE Weisweiler||2004–2008||Hitachi Power|