SAMUEL J MANGANELLO
Engineers in Pittsburgh, PA
License number
Pennsylvania PE004685E
Category
Engineers
Type
Professional Engineer
Address
Address
Pittsburgh, PA 15235
Professional information
Thermomechanically Controlled Processed High Strength Weathering Steel With Low Yield/Tensile Ratio
US Patent:
6056833, May 2, 2000
Filed:
Jul 20, 1998
Appl. No.:
9/118902
Inventors:
Riad Asfahani - Cranberry Township PA
Samuel J. Manganello - Pittsburgh PA
Samuel J. Manganello - Pittsburgh PA
Assignee:
USX Corporation - Pittsburgh PA
International Classification:
C22C 3820, C22C 3824
US Classification:
148334
Abstract:
A high performance weathering steel having a minimum yield strength of 70-75 ksi and a yield/tensile ratio less than about 0. 85 is produced from a steel composition consisting essentially, in weight percent, of about: carbon 0. 08-0. 12%; manganese 0. 80-1. 35%; silicon 0. 30-0. 65%; molybdenum 0. 08-0. 35%; vanadium 0. 06-0. 14%; copper 0. 20-0. 40%; nickel 0. 50% max. ; chromium 0. 30-0. 70%; phosphorous 0. 010-0. 020%; columbium up to about 0. 04%, titanium up to 0. 02%, sulfur up to 0. 01%, iron, balance except for incidental impurities; heating the steel to a hot rolling temperature, rolling the steel to a thickness about 2 to 3 times the final desired thickness, air-cooling the steel to a temperature of about 1800-1850. degree. F. (RCR) or about 1600-1650. degree. F. (CCR), recrystallize control rolling or conventionally control rolling the steel with finish rolling at a temperature of about 1700-1750. degree. F.