It is well understood that higher steam temperatures enable increased operational efficiencies. For supercritical conditions, the forging best suited for elevated temperatures is X12CrMoWVNb10-1-1, or the advanced 10 Cr steel. This was developed by the European COST 501 programme for operations at 600°C. The 10 Cr is excellent for its high strength as well as its enhanced creep life and creep s...