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Page 37 - Best of STIL 2018 English
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 Some orders place extreme demands on the material, its processing and the conditions for its implementation. And some assign- ments even become genuine adventures
in far off countries. In many cases, steel from Group companies also plays its part in creating new technical or engineering superlatives. There are few good examples of such highlights on the pages ahead.
Steels for extreme demands
There’s more to steel than meets the eye, with countless types for different applications. These are referred to as “steel grades”. They primarily differ in two key characteristics: tensile strength and yield strength. Steels with a low yield strength can be easily deformed. If there are extreme demands placed on their formability – e.g. through deep drawing – these soft steels represent a good option for cold forming. By contrast, steels with high tensile strength attempt to block any attempts at changing their shape, and these grades are used for applications like the lateral protection structures and bumper beams of cars. Their yield strength is naturally very high. Construction machines such as excavators and cranes, by contrast, place extreme requirements on the
wear resistance of steel. The manufacture of these machines calls for very hard special structural steels. These are all extreme examples, and often the genuine art of engineering is in developing steel grades for applications which require different characteristics to be rolled into one.
The heaviest coil
A coil produced at Salzgitter Flachstahl GmbH generally weighs between 14.3 and 30 tons.
But not always. Some customers request more steel on their coils, resulting in coils weighing
up to 35 tons. These gigantic coils offer a major advantage for production – in the automotive industry, for example - as they have to be changed less frequently. These heavy steel rolls, however, can prove a challenge when it comes to transport. A railway wagon can only carry a maximum of
68 tons – i.e. only one 35-ton coil instead of two standard coils. Trucks are entirely unable to trans- port these products, as they are only permitted to carry a maximum load of 31 tons. Due to these handling challenges, such heavy coils remain an exception.
The coking coal express Twice daily, at 7 AM and 1 PM, a Peine-Salzgit- ter (VPS) train sets off from the harbor in Hamburg. Every one of its 48 freight wagons is loaded with 48 to 64 tons of coking coal. The wagons are linked to form a train 600 meters
in length – making it Germany’s largest coking coal transport. There isn’t a great deal of room for “parking maneuvers”, as the HANSAPORT
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