INDUSTRY NEWS Same quality for half the price
W
elded tubes manufactured by Schoeller Werk have
successfully passed the approval tests as transmission in railway applications. With these tubes, the customer will get products with the same hardness specifications, but, at about 50% lower costs. The first tubes are scheduled to be delivered in early 2014. . Recently, Schoeller Werk
received the first order for longitudinally welded tubes to be used as transmission in trains. In the past, only seamless tubes were used for this application. As prices are significantly lower and lead times much shorter, the customer will change to welded tubulars as transmission pipes in braking systems. The company had conducted comprehensive tests on five kilometers of sample tubes at the customer’s facilities. In these tests, Schoeller Werk proved that longitudinally welded tubes are equal to seamless tubes in terms of mechanical properties and surface quality. As brake lines are safety- critical equipment, the customer had defined exacting specifications for both the mechanical and chemical properties, the tolerances and the surface quality. They meets these specifications without exception. The new tubes are made of
the same material as those used in the past: grade 1.4301 with an
2 IMT February/March 2014
elevated nickel content. With a weld strength reduction factor of 1.0, the tubes feature the same strength value as seamless tubes of identical dimensions. The contract provides for the supply of ten different sizes with outside diameters between 6 and 28 mm. The company is one of only a few manufacturers capable of making the complete size range in its own production plant. Stefan Brilling, Manager Industrial Sales at Schoeller Werk, sees clear cost advantages for his customers: “Many engineers still consider seamless tubes as sacred cows.
www.internationalmetaltube.com
Yet, our longitudinally welded tubes have already proved to be successful in many applications, including highly demanding and safety-critical ones. But this recent order speaks for itself: Featuring a weld strength reduction factor of 1.0, our tubes can be installed without having to make any changes to the design. Tubes of the same dimensions provide the same strength but cost much less.“ More information on Schoeller Werk GmbH & Co. KG t: +49.2482.81-129 f: +49.2482.81-109
www.schoellerwerk.de info@
schoellerwerk.de.de
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