Corrosion-resistant high-strength low-alloy steels
Abstract
Abstract LOW-ABLE STEELS HAVING FIVE TO EIGHT TIMES THE ATMOSPHERIC CORROSION RESISTANCE OF CARBON STEELS, 80,000 P.S.I. MINIMUM YIELD STRENGTHS AND AN OVERALLY DESIRABLE BALANCE OF MECHANICAL PROPERTIES PRODUCED DIRECTLY OFF THE HOTMILL HAVE THE FOLLOWING CHEMISTRY: CARBON, 0.4% TO 10%; MANGANESE, 40% TO 1.80%; SULFUR, .03% MAXIMUN; ALUMINUM, .015% MINIMUM; CHROMIUM, .90% TO 1.20%; COPPER, .30% TO .50% SILICON, .50% TO 1.20%; PHOSPHORUS, 10% TO .15%; COLUMBIUM, .015% TO .040%; AND ZIRCONIUM, .04% TO .12% OR A TOTAL CONTENT OF RARE EARTH ELEMENTS, SUCH AS CERIUM AND LANTHANUM, SUCH THAT THE WEIGHT RATIO OF TOTAL RARE EARTHS TO SULFUR IS AT LEAST 2.8 TO 1. IN PROCESSING THE STEEL TO STRIP OR PLATE, IT IS HOT-ROLLED SO AS TO HAVE A FININSHING TEMPERATURE BETWEEN ITS A3 F./SEC. AND 45*F./SEC. AND COILED OR POLED AT A TEM20*F./SEC. AND 45*F./SEC. AND COILED OR PILED AT A TEMPERATURE OF 1100*F.$100*F.
Inventors
- 👤 M Korchynsky
- 👤 J Bell
- 👤 R Cover
Bibliographic Details
Claims Analysis
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