Arcelormittal Investigacion Y Desarrollo, S.l.

Bethlehem Steel Corporation

Arcelormittal

Bethlehem Steel Co.

Steven S. Hansen

Bruce L. Bramfitt

Bruce L Bramfitt

Fred B Fletcher

John A Davis, Jr

Steven S Hansen

Frederick B Fletcher

John S Nelson

Jason T McCullough

Michael A Muscarella

Arnold R Marder

Leonard C Luscomb

Donald L Harper

Roger R Pradhan

Jr John A Davis

Frederick Fletcher

Jason Mccullough

Michael Muscarella

John Nelson

A method of making a high strength head-hardened crane rail and the crane rail produced by the method. The method comprises the steps of providing a steel rail having a composition comprising, in weight percent: C 0.79-1.00%; Mn 0.40-1.00; Si 0.30-1.00; Cr 0.20-1.00; V 0.05-0.35; Ti 0.01-0.035; N 0.002 to 0.0150; and the remainder being predominantly iron. The steel rail is cooled from a temperature between about 700 and 800&#xb0; C. at a cooling rate having an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 800&#xb0; C.), (40 s, 700&#xb0; C.), and (140 s, 600&#xb0; C.) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 700&#xb0; C.), (40 s, 600&#xb0; C.), and (140 s, 500&#xb0; C.).

Method of making high strength steel crane rail

A method of making a hypereutectoid, head-hardened steel rail is provided that includes a step of head hardening a steel rail having a composition containing 0.86-1.00 wt % carbon, 0.40-0.75 wt % manganese, 0.40-1.00 wt % silicon, 0.05-0.15 wt % vanadium, 0.015-0.030 wt % titanium, and sufficient nitrogen to react with the titanium to form titanium nitride. Head hardening is conducted at a cooling rate that, if plotted on a graph with xy-coordinates with the x-axis representing cooling time in seconds, and the y-axis representing temperature in Celsius of the surface of the head of the steel rail, is maintained in a region between an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 775&#xb0; C.), (20 s, 670&#xb0; C.), and (110 s, 550&#xb0; C.) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 750&#xb0; C.), (20 s, 610&#xb0; C.), and (110 s, 500&#xb0; C.).

Hypereutectoid-head steel rail

Hypereutectoid, head-hardened steel rail

Method of making a hypereutectoid, head-hardened steel rail

A high strength, high toughness steel comprising from about 0.32 to about 0.36 percent by weight carbon, from about 0.40 to about 0.60 percent by weight manganese, from about 0.15 to about 0.35 percent by weight silicon, from about 0.80 to about 1.10 percent by weight chromium, from about 0.55 to about 0.70 percent by weight molybdenum, from about 0.01 to about 0.05 percent by weight aluminum, from about 0.002 to about 0.004 calcium, no more than about 0.015 percent by weight phosphorus, no more than about 0.008 percent by weight sulfur, with the balance being iron.

High strength, high toughness steel grade and gas cylinder thereof

A microalloyed, fully killed steel has a composition, in weight percent, of from about 0.20 to about 0.45 percent carbon, from about 0.90 to about 1.70 percent manganese, from about 0.10 to about 0.35 percent silicon, from about 0.01 to about 0.04 percent aluminum, from about 0.05 to about 0.20 percent vanadium, from about 0.008 to about 0.024 percent nitrogen, balance iron. The steel is particularly useful when hot rolled to a railway joint bar section, and air cooled. The resulting joint bar meets AREA specifications in the as-rolled condition, without the need for a reheat and oil quench heat treatment after rolling.

Microalloyed steel and process for preparing a railroad joint bar

This invention is directed to a hot-rolled steel sheet having an essentially refined ferritic grain size, a balanced chemical composition comprising, by weight, 0.06 to 0.09% carbon, 1.0 to 1.6% manganese, 0.5% maximum silicon, 0.03 to 0.05% columbium, 0.06 to 0.12% vanadium, 0.010 to 0.025% nitrogen, 0.004% maximum sulfur, 0.02% maximum phosphorus, 0.02 to 0.08% aluminum, balance essentially iron, and characterized by 80 ksi minimum yield strength, improved transverse bendability, and improved sheared edge stretchability.

Formable high strength low alloy steel sheet

This invention is directed to a method and to the resulting product, wherein said product is a low-carbon dual phase steel having a combination of high strength, good ductility and a YS/TS ratio .ltoreq.0.6. The method includes the steps of (1) preparing an Al-killed steel consisting essentially of 0.05 to 0.15 wt. % C, up to 2.0 wt. % Mn, up to 1.0 wt. % Si, 0.03 to 0.15 wt. % V and a sufficient amount of titanium to 'getter' the excess sulfur and nitrogen, with the balance essentially being iron, where the titanium addition should be at least equal to the atomic percent of the sulfur plus nitrogen, but no more than about 1.6 times, (2) intercritically annealing such steel within the .alpha.+.gamma. temperature range, and (3) cooling to room temperature.

Titanium and vanadium dual-phase steel and method of manufacture

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Bethlehem, PA, United States of America

Bruce L Bramfitt