CECMAT - Metals Part 1

The first all-metal structure, a cast iron bridge, was built in the late ___ in ___

Cast iron, produced from iron ore in a blast furnace, and wrought iron, iron that has been purified by beating it repeatedly with a hammer, were used increasingly for framing industrial buildings in ___ and ___ in the first of the ___

any of a range of alloys of iron that contain less than 2 percent carbon.

Types of Steel:

known by its ASTM designation of A36, was for decades the predominant steel type used in building frames.

also called the ordinary steel. contains less than three-tenths of 1 % carbon, plus traces plus traces of beneficial elements such as manganese, silicon and of detrimental impurities such as phosphorous, sulfur, oxygen and Nitrogen.

contains 3 to 4 percent carbon and greater quantities of impurities than steel

contains even less carbon than most steel alloys

steel is the preferred steel type for standard wide- angle structural shapes.

steel is specified for angles, channels, plates, and bars