Abstract: The invention concerns the use of a wear resistant, temper resisting steel alloy of______________________________________ 0.30 to 0.40% carbon 1.0 to 1.60% silicon 0.50 to 0.80% manganese 2.0 to 2.6% chromium maximum 0.025% phosphorus maximum 0.025% sulfur the remainder iron and limited contaminants. ______________________________________The alloy is used as the work material for making dredger teeth forged in a close-die, especially suction dredger teeth, which teeth after the forging are heated to a temperature above the A.sub.3 temperature, are hardened in oil and tempered.

Abstract: The invention concerns a method for manufacturing a worked weldable, low temperature ferritic steel consisting of0.015 to 0.08% C0.1 to 0.5% Si0.3 to 0.6% Mn<0.015% P<0.015% S4 to 7% Ni0 to 1.5% Cuthe rest iron and unavoidable impurities in normal amounts which is characterized in that the steel has added to it 0.15 to 0.25% vanadian and 0.020 to 0.030% nitrogen; the steel being rolled and then cooled to room temperature and finally subjected to a one time normalizing. Such a steel is usable as work material for making construction part especially for the transport and storage of liquified natural gas and having at a temperature of -196.degree. C. a notch charpy impact value at longitudinal test samples of more than 42 J.