High-strength low-alloy steels having improved formability
Abstract
Abstract FULLY KILLED HIGH-STRENGTH LOW-ALLOY STEELS CONSISTING ESSENTIALLY OF .06% TO .20% CARBON, .50% TO 1.4% MANGANESE, .01% TO .08% COLUMBIUM OR .04% TO .12% VANADIUM, .05% MAXIMUM SILICON, .04% MAXIMUM SULFUR, .04% MAXIMUM PHOSPHORUS AND AN INCLUSION SHAPE-CONTROL AGENT COMPRISING EITHER .06% TO .20% ZIRCONIUM, .01% TO .10% OF A REARE EARTH OR.01% TO .10% MISCHMETAL ARE CHARACTERIZED IN A HOT-ROLLED FINISHED CONDITION BY YIELD STRENGTHS IN EXCESS OF 45,000 P.S.I., ULTIMATE TENSILE STRENGTHS IN EXCESS OF 60,000 P.S.I., DUCTILITIES AS MEASURED BY PERCENT ELONGATION (2 INCHES) IN EXCESS OF 20%, GOOD TOUGHNESS, SUPERIOR FORMABILITY AND REDUCED DIRECTIONALITY . THE STEELS ARE HOT-ROLLED FINISHED IN THE TEMPERATURE RANGE 1550*F. TO 1650*F., COOLED AT A RATEA WITHIN THE RANGE 20*F. TO 135*F. PER SECOND AND COLLECTED BY COILING OR PILING WITHIN A TEMPERATURE RANGE OF 1025*F. TO 1175*F.
Inventors
- 👤 Michael Korchynsky
- 👤 John David Grozier
- 👤 John L Mihelich
Bibliographic Details
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