| 摘要 |
<p>A machinery steel intended for rugged operating conditions, and specifically continuous casting rolls, which have near isotropic properties due to the controlled use of calcium, aluminum and melting techniques, and having the following constituents and characteristics: C - from about .15 to about .25 Mn - " " .75 " " 1.25 Si - " " .15 " " .50 Ni - " "1.00 " " 1.50 Cr - " "1.00 " " 1.50 Mo - " " .35 " " .45 Al - up to .050 max. V - " .10 max. P - " .025 max. S - " .025 max. H2 - " 2.5 max. O2 - " 70 ppm max. Fe - balance, plus usual non deleterious impurities, said steel being further characterized by the presence of Type III sulfides being predominate over Type II sulfides.</p> |
