Abstract: A lightweight steel slab including a first panel defining a first plane, a second panel spaced apart from the first panel and defining a second plane, and a truss structure coupled to the first panel and the second panel. The truss structure includes a plurality of struts extending between the first panel and the second panel. At least some of the plurality of struts includes linear elements that are obliquely angled relative to the first plane and the second plane.

Abstract: A steel foam sheet and a method of producing a hot-rolled steel sheet, wherein a steel slab is prepared by casting molten steel, the steel slab including a plurality of interconnected pores that form a substantially uniform pattern within the steel slab, wherein the steel slab is cooled, reheated, and hot rolled at a starting temperature of between 1050 degrees Celsius and 1230 degrees Celsius to form the steel slab into the hot-rolled steel sheet. The plurality of interconnected pores can be flattened during hot rolling. The hot-rolled steel sheet can also be cooled and heat treated.

Abstract: A steel foam component includes a steel body having a plurality of pores. The plurality of pores forms a generally uniform pattern throughout the body and occupies at least 20 percent of a volume of the body.

Abstract: A method of producing a steel foam component includes providing a mold defining a cavity. The method also includes positioning an insert within the cavity of the mold. The insert can be configured to form a generally uniform pattern of pores within the steel foam component, and in some cases occupies at least 20% of the cavity. The method can further include pouring molten steel into the cavity, cooling the molten steel into the steel foam component, and removing the steel foam component and the insert from the mold. Steel components having internal shapes corresponding to the insert(s) are also provided.

Abstract: A method of producing a steel foam component includes providing a mold defining a cavity. The method also includes positioning an insert within the cavity of the mold. The insert can be configured to form a generally uniform pattern of pores within the steel foam component, and in some cases occupies at least 20% of the cavity. The method can further include pouring molten steel into the cavity, cooling the molten steel into the steel foam component, and removing the steel foam component and the insert from the mold. Steel components having internal shapes corresponding to the insert(s) are also provided.

Abstract: A method of producing a steel foam component includes providing a mold defining a cavity. The method also includes positioning an insert within the cavity of the mold. The insert can be configured to form a generally uniform pattern of pores within the steel foam component, and in some cases occupies at least 20% of the cavity. The method can further include pouring molten steel into the cavity, cooling the molten steel into the steel foam component, and removing the steel foam component and the insert from the mold. Steel components having internal shapes corresponding to the insert(s) are also provided.

Abstract: A method of producing a steel foam component includes providing a mold defining a cavity. The method also includes positioning an insert within the cavity of the mold. The insert can be configured to form a generally uniform pattern of pores within the steel foam component, and in some cases occupies at least 20% of the cavity. The method can further include pouring molten steel into the cavity, cooling the molten steel into the steel foam component, and removing the steel foam component and the insert from the mold. Steel components having internal shapes corresponding to the insert(s) are also provided.