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Abstract

The invention provides a high-strength steel that has excellent ductile fracture values J integral even at low temperatures, so the risk of the component, which is produced in each case from the steel, breaking is reduced to a minimum even under unfavourable, hard operating conditions. This is achieved in that it contains (in % by weight) 0.08 to 0.25% C, 0.10 to 0.30% Si, 0.80 to 1.60% Mn,=0.020% P,=0.015% S, the sum of the P and S content being=0.030%, 0.40 to 0.80% Cr, 0.30 to 0.50% Mo, 0.70 to 1.20% Ni, 0.020 to 0.060% Al, 0.007 to 0.018% N,=0.15% V,=0.07% Nb, the sum of the V and Nb content being=0.020% and the remainder being iron and inevitable impurities. The steel according to the invention is particularly suitable for the manufacture of high-strength chains.

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First Claim