| 摘要 |
A steel having a composition, expressed in wt. %, of: 0.03<=C<=0.06; 0.50<=Mn<=1.10; 0.08<=Si<=0.20; 0.015<=Al<=0.070; N<=0.007; Ni<=0.040; Cu<=0.040; P<=0.035; S<=0.015; Mo<=0.008; Ti<=0.005; and boron in an amount such that: 0.65<=B/N<=1.60, the rest of the composition consisting of iron and impurities resulting from preparation. Also a method for making steel plates having this composition, and the resulting plates, produced by the method.
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