| 摘要 |
<p>The invention relates to the use of a fine grain manganese-nickel structural steel which contains 0.04% to 0.09% carbon, 1.2 to 1.8% manganese, 0.1 to 0.4% silicon, 0.03 to 0.08% niobium, 0.5 to 1.5% nickel, up to 0.025% aluminum, up to 0.015% sulfur and, optionally, 0.2 to 0.4% copper, the residue being iron including the impurities resulting from smelting as a material for workpieces, e.g., pipes and vessels, which may get in contact with liquid gases at temperatures of at least -120.degree.C.</p> |
