A. Finkl & Sons Co.

Albert L Lehman

Charles W Finkl

Herbert S Philbrick, Jr

A low alloy steel having a medium carbon content, and less than about 5% and less than about 1% Mn, which has hardenability approaching unity derived from the presence of N in an amount of from about 100-400 ppm, and a method of manufacturing such a steel which preferably contains the processing step in the late stages of manufacture of bubbling nitrogen gas through the molten steel.

Nitrogen steel and method of manufacture thereof

A steel product, such as a medium carbon die block, having good impact, ductility, transverse and physical properties, and lower than normal sulphur contents yet having machinability equal or better than higher sulphur levels characterized by a lower than ordinary level of stringer-type inclusions, other inclusions being mainly of the non-deleterious globular type.

Low alloy steel product

A method of refining steel in the ladle using a low melting point slag is disclosed. Both ELS and resulfurized steels are subjected to the simultaneous effect of a vacuum and a purging agent, preferably an inert gas, to lower the H.sub.2 content into the flake-free range irrespective of the chemistry of the steel, and heat is added via AC arcs from non-consumable electrodes at a temperature only slightly higher than the solidication temperature of the steel, preferably about 2840.degree. F. Steel produced thereby is also disclosed.

Method of ladle steelmaking and product produced thereby

A ladle steelmaking process in which ramp modulation of vacuum boil, voltage shedding to avoid glow and multiple stirring sources are employed individually, or in any combination, with the basic vacuum are degassing parameters (vacuum, purging and AC area) to shorten cycle time, and apparatus therefore.

Ladle steelmaking method and apparatus

A machinery steel intended for rugged operating conditions, such as continuous casting rolls, and have near isotropic properties due to the controlled use of calcium, aluminum and melting techniques, and having the following constituents and characteristics:

Machinery steel

A steel is disclosed having a broad composition range as follows:

Steel having improved surface and reduction of area transverse

An apparatus and method for consistently and economically lowering the sulfur content of steel into the 0.003/0.006 range and preferably to 0.003 maximum, which involves conditioning the steel near the end of, or immediately after, melt-down in the melting unit, followed by subjection to a highly basic, fluidized slag and violent agitation under vacuum conditions.

Method for desulfurization using arc heat under vacuum

A steel especially adapted for applications in which high fatigue resistance is required, and having a nominal composition of:

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Glenview, IL, United States of America

Albert L Lehman