Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1974-11-11
1976-06-22
Stallard, W.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75123J, 148 12F, 148 124, 148 36, C22C 3806, C22C 3812, C21D 714
Patent
active
RE0288780
ABSTRACT:
Fully killed high-strength low-alloy steels consisting essentially of .12% to .20% carbon, 1.10% to 1.65% manganese, .05% to .20% vanadium, .005% to .025% nitrogen, .04% maximum phosphorus, .025% maximum sulfur, .60% maximum silicon and balance iron are characterized in a hot-rolled finished condition by yield strengths in excess of 80,000 p.s.i., ultimate tensile strengths in excess of 95,000 p.s.i., ductilities as measured by percent elongation (2 inches) in excess of 18% and good toughness. The steels are hot-rolled finished in the temperature range 1550.degree. F. to 1650.degree. F., cooled at a rate within the range 20.degree. F. to 135.degree. F. per second and collected by coiling or piling within a temperature range of 1025.degree. F. to 1175.degree. F. The steels modified by the incorporation of .01% to .10% of a rare earth are further characterized by improved formability.
REFERENCES:
patent: 3010822 (1961-11-01), Altenburger et al.
patent: 3102831 (1963-09-01), Tisdale
patent: 3494808 (1970-02-01), Goda et al.
patent: 3539404 (1970-11-01), De Retana
Bell John R.
Grozier John David
Korchynsky Michael
Luyckx Leon
Mihelich John L.
Jones & Laughlin Steel Corporation
Stallard W.
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