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Term
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Definition
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| Hammermill |
A high-speed rotor equipped with large happers for pulverizing material into smaller sizes. Large machines are often used to crush automobiles and other heavy-duty scrap metal. |
| HBI - Hot Briquetted Iron |
HBI (and DRI) is processed iron ore that is iron-rich enough to be used as a scrap substitute in electric furnace steelmaking. HBI is Direct Reduced Iron that has been processed into briquettes. Because briquetted DRI (HBI) is more stable than DRI pellets, it is less likely to re-oxidize, especially in the presence of moisture, and is preferred when the metallic material must be stored or transported large distances. HBI is therefore more suited for the merchant market. See DRI.
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| Heat (of Steel) |
A batch of refined steel. A basic oxygen or electric furnace full of steel. One heat of steel will be used to cast several slabs, blooms or billets. |
| Heat Treatment |
What. Altering the properties of steel by subjecting it to a series of temperature changes.
Why. To increase the hardness, strength, or ductility of steel so that it is suitable for additional applications.
How. The steel is heated and then cooled as necessary to provide changes in the structural form that will impart the desired characteristics. The time spent at each temperature and the rates of cooling have significant impact on the effect of the treatment. |
| Heavy Structural Shapes |
A general term given to rolled flanged sections that have at least one dimension of their cross sections three inches or greater. The category includes beams, channels, tees and zees if the depth dimension is three inches or greater, and angles if the length of the leg is three inches or greater. |
| Heavy Tare |
A tare weight, taken at destination, which is greater than the tare weight taken at origin, and/or heavier than the stencil weight, by a considerable amount. |
| Hedging |
Taking an opposite position in the commodity futures market to your position in the physical market. |
| High Side Car |
Usually referring to gondola cars whose sides are higher than normal, made to increase capacity. Often high side gondola cars cause loading or unloading problems. |
| High-Carbon Steel |
Steel with more than 0.3% carbon. The more carbon that is dissolved in the iron, the less formable and the tougher the steel becomes. High-carbon steel's hardness makes it suitable for plow blades, shovels, bedsprings,cutting edges, or other high-wear applications. |
| Hold Track |
A track where cars are held awaiting disposition orders from shippers or receivers. |
