Feed-water heater comprising low C-Cr-Mo steel components used u

Details Feed-water heater comprising low C-Cr-Mo steel components used u Feed-water heater comprising low C-Cr-Mo steel components used u

1987-07-08

1989-08-01

Yee, Deborah

Heat exchange

With protector or protective agent

165905, 122DIG13, 148334, 148335, F28F 1906

Patent

active

RE0330060

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 susbtantially 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 (1986-01-01), Brady et al.
patent: 3251682 (1966-05-01), Wada
patent: 3271138 (1962-03-01), Ohtake et al.

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