Low C-Cr-Mo steel used under wet steam

Details Low C-Cr-Mo steel used under wet steam Low C-Cr-Mo steel used under wet steam

1982-02-24

1985-07-16

Rutledge, L. Dwayne

Metal treatment

Compositions

Heat treating

122412, 75126C, 75124, C22C 2900

Patent

active

045294542

ABSTRACT:
A novel low C-Cr-Mo steel having an excellent weldability and a high erosion-corrosion resistance under wet steam, which consists of, in % by weight, 0.02-0.14% of C, not more than 0.90% of Si, 0.30-0.80% of Mn, 0.70-1.60% of Cr, 0.40-0.70% of Mo and the remainder being substantially Fe. This novel steel is a very excellent material for fabricating the portions in the feed-water heater, for example, for a nuclear power generation plant, the portions being used under wet steam condition. The above described weldability and erosion-corrosion resistance can be improved by additionally adding the second components of Cu, N, or B, the third components of Nb or V or the fourth components of Al, Ti or Zr in the respectively defined amounts.

REFERENCES:
patent: 2968549 (1961-01-01), Brady et al.
patent: 3251682 (1966-05-01), Wada
patent: 3271138 (1962-03-01), Ohtake et al.

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