Cr-Mo Steel for use as very thick plates of 75 mm or more for oi

Details Cr-Mo Steel for use as very thick plates of 75 mm or more for oi Cr-Mo Steel for use as very thick plates of 75 mm or more for oi

1981-08-31

1983-08-23

Skiff, Peter K.

Metal treatment

Compositions

Heat treating

75124, 75126P, C22C 3832

Patent

active

044002254

ABSTRACT:
A Cr-Mo steel which is suitable for use as extremely thick plates of 75 mm or greater for pressel vessels of oil refinery, coal liquefaction and coal gasification equipment. The Cr-Mo steel includes 0.09 to 0.17 wt % of carbon, 0.03 to 0.50 wt % of silicon, 0.45 to 0.70 wt % of manganese, 1.80 to 3.40 wt % of chromium, 0.80 to 1.20 wt % of molybdenum, 0.035 to 0.1 wt % of aluminum and 0.0010 to 0.0040 wt % of boron and the balance iron and impurities inevitably mixed in steel-making processes. The Cr-Mo steel of such compositions is highly excellent in high-temperature strength, toughness and hydrogen attack resistance.

REFERENCES:
patent: 3328211 (1967-06-01), Nakamura et al.
patent: 3463677 (1969-08-01), Nakamura et al.

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