| 摘要 |
11 PCT/DE92/00987 : The invention is directed to a process for producing seamless steel pipes or flat products (strip or sheet) for pipes or vessels which are intended for the conveyance, transport or processing of gaseous or liquid hydrocarbons containing CO2 and water and possibly small proportions of H2S and are resistant to stress crack corrosion and have good welding properties at the same time and a 0.2-percent elongation limit of at least 450 N/mm2, wherein a nickel-containing steel of the following composition is used (percent by weight): min. 0.015 % C, 0.15-0.50 % Si, max. 2.00% Mn, max. 0.020 % P, max. 0.003 % S, 12.0-13.8 % Cr, 0.002-0.02 % N, 0.01-0.05 % Nb, remainder iron and usual impurities. It is suggested according to the invention that the nickel content is limited to a maximum of 0.25%, the manganese content amounts to at least 1.0%, the carbon content is limited to 0.035%, and 0.01 to 1.2% molybdenum is contained as additional alloying component.
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