Bethlehem Steel

About: Bethlehem Steel is a based out in . It is known for research contribution in the topics: Coating & Corrosion. The organization has 1529 authors who have published 1559 publications receiving 19098 citations. The organization is also known as: Bethlehem Steel Corporation.

Design of I-Shaped Beams with Diaphragm Bracing

Abstract: Cold-formed steel panels are used as wall sheathing, roof decking, or floor decking in steel framed buildings. Diaphragms formed by interconnecting these panels have considerable in-plane shear resistance, and can be utilized as bracing against buckling for individual members of a steel frame. The utilization of existing floor or roof diaphragms as bracing for individual beams can eliminate the need for other types of bracking, and reduce required member sizes, or both, thus contributing to economical design. A procedure is presented for the design of I-beam of I- section beams with diaphragm bracing on either the tension or compression flanges. The procedure is based on the ultimate load capacity of fully braced members, utilizing a conservative estimate of the shear strength and shear rigidity of the diaphragm. A design example is included.

Inference equations for fracture toughness testing: Numerical analysis and experimental verification

Abstract: The currently codified fracture toughness testing procedures, e.g., ASTM E 813, E 1152, E 1290, and BSI 7448:Part 1 use a set of inference equations to obtain J and CTOD from the measurements of global displacement and load. These inference equations were originally developed by assuming homogeneous and perfectly plastic material properties. Inaccurate results may be obtained when these inference equations are applied to non-homogeneous specimens and materials with strain hardening. A systematic study of the relationship between crack driving force (J and CTOD) and the remote load and displacement is conducted using finite element method. The relationship derived from the study is compared with the inference equations used in the current standards. The accuracy of the currently codified J and CTOD inference equations and those proposed in recent years is examined. Compared with the codified inference equations, the new equations can be applied to a wide range of crack depth (0.1 {le} a/W {le} 0.5). The new CTOD inference equations provide much more accurate CTOD values for high strain hardening material than is possible using the current standards. The accuracy of the codified inference equations and the new equations is expressed in terms of weld width, strain hardening rate,more » and mismatch levels. The CTOD inference equations are tested through corroboration with experimentally measured values of CTOD in an unwelded HSLA structural steel. The new equations provide better agreement with the experimental measurements than the codified equations.« less

Proposed Steel Column Strength Criteria

Abstract: The development of proposed design criteria is presented for pinned end columns for the load and resistance factor design provisions being developed for the American Institute of Steel Construction (AISC). Available test data have been examined by regression analysis to determine a practical column strength equation for design. The study resulted in the division of slenderness into three regions: a plastic region where slenderness does not effect column strength; an inelastic region where strength decreases linearly with increasing slenderness; and an elastic region where strength is defined by a hyperbola. Equations representing column strength in each of these regions are developed, and a resistance factor to be used with these equations is derived.

Method of hot reducing ferrous and ferrous alloy products with composite martensitic nodular cast chill iron rolls

Abstract: This invention is directed to a method of hot reducing ferrous and ferrous alloy products, such as plates, strip, bars and rods, where such products are heated to temperatures in excess of 1900° F and subsequently reduced at temperatures within the range of about 900° and the initial heating temperature. More particularly, this invention relates to the method of effecting said hot reducing at such temperatures by means of composite, martensitic, nodular graphite chill cast iron rolls. Such rolls are characterized by (1) an average surface hardness of at least about 76 Shore-C, (2) a thermal-crack-resistant chill cast surface portion consisting essentially of, by weight, about 3.00% to 3.70% carbon, about 0.35% to 1.25% manganese, about 1.0% to 2.0% silicon, about 3.75% to 5.75% nickel, about 0.75% to 1.35% chromium, about 0.40 to 1.10% molybdenum, about 0.3% to 0.08% magnesium, balance iron and incidential impurities, and (3) a core portion comprising a ferrous alloy.

Continuous caster tundish having wall dams

Abstract: A continuous caster tundish having refractory wall dams formed as part of a portion of the lining of the interior of the side walls, where each refractory wall dam is characterized by a flange projecting substantially horizontally inwardly to prevent turbulent surface flow as molten metal is poured into the tundish.