Tham khảo tài liệu 'structure steel design's handbook 2009 part 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | SECTION 1 PROPERTIES OF STRUCTURAL STEELS AND EFFECTS OF STEELMAKING AND FABRICATION R. L. Brockenbrough PE. President R. L. Brockenbrough Associates Inc. Pittsburgh Pennsylvania This section presents and discusses the properties of structural steels that are of importance in design and construction. Designers should be familiar with these properties so that they can select the most economical combination of suitable steels for each application and use the materials efficiently and safely. In accordance with contemporary practice the steels described in this section are given the names of the corresponding specifications of ASTM 100 Barr Harbor Dr. West Conshohocken PA 19428. For example all steels covered by ASTM A588 Specification for High-strength Low-alloy Structural Steel are called A588 steel. STRUCTURAL STEEL SHAPES AND PLATES Steels for structural uses may be classified by chemical composition tensile properties and method of manufacture as carbon steels high-strength low-alloy steels HSLA heat-treated carbon steels and heat-treated constructional alloy steels. A typical stress-strain curve for a steel in each classification is shown in Fig. to illustrate the increasing strength levels provided by the four classifications of steel. The availability of this wide range of specified minimum strengths as well as other material properties enables the designer to select an economical material that will perform the required function for each application. Some of the most widely used steels in each classification are listed in Table with their specified strengths in shapes and plates. These steels are weldable but the welding materials and procedures for each steel must be in accordance with approved methods. Welding information for each of the steels is available from most steel producers and in publications of the American Welding Society. Carbon Steels A steel may be classified as a carbon steel if 1 the maximum content .
