Low alloy steels for use in pressure vessels.

摘要

Low alloy steels for use in pressure vessels comprising on a weight % basis:
<UnorderedLists id="ula01" listStyle="none"><ListItem>C: from 0.05 % to 0.30 %,</ListItem><ListItem>Si : less than 0.10 %,</ListItem><ListItem>Mn: from 0.3 % to 1.5 %,</ListItem><ListItem>Ni : from inevitably incorporated content to 0.55 %,</ListItem><ListItem>Cr : from 1.5 %to 5.5 %,</ListItem><ListItem>Mo : from 0.25 % to 1.5 %,</ListItem><ListItem>V : in excess of 0.10 % and less than 0.6 %, and</ListItem></UnorderedLists>
the balance of iron and inevitably incorporated impurities. The steels are excellent in hardenability, hot strength, toughness, weldability and hydrogen attack and embrittlement resistance, as well as showing excellent toughness after use in the temper brittle temperature region.