TPi September 2017

products & developments Heat-resistant stainless steel for the safe trasport of hot gases and vapours by the process industry

temperature-dependent deformation) and resistance to atmospheric corrosion and oxidation at high temperatures further increase process reliability. Ugitech offers UGI 4550 in a wide range of dimensions, from steel bar with a diameter of 130mm to ultrafine 16µm in diameter. The steel product is annealed or cold drawn to the required mechanical properties. The minimum order quantity at Ugitech is one ton for drawn steel bar, and lower for drawn wire. The company is able to deliver rapidly because the steel mill is equipped with

finished steel grades well adapted for temperature ranges between 425°C and 850°C. Compared to most austenitic materials, UGI 4550 inhibits the formation of chromium carbide precipitates at the grain boundaries and thus stops inter- granular corrosion. The stainless product is optimum for parts for which treatment of the material after welding is not feasible, such as expansion joints and equipment for chemical processing at high temperatures. UGI 4550 is also readily formed at room temperature and is easy to weld – there is no hot cracking after welding. Good creep resistance (resilience against

For the safe transport of hot gases and vapours at temperatures of up to 850°C, many manufacturers of compo- nents for the process industry choose austenitic stainless steel 1.4550/347H. To meet increasing demand, Ugitech has added UGI ® 4550 to its stainless portfolio, making it one of only three suppliers in Europe. The company sees this move as a way of enhancing its position as a producer of austenitic heat-resistant stainless grades for the process industry. Steam lines, superheater tubes and exhaust systems in reciprocating engines and gas turbines are typical applications for Ugitech’s UGI 4550. The addition of niobium makes the

40t melting furnaces. Ugitech SA – France www.ugitech.com

Ugitech’s UGI 4550 is used in applications such as steam lines, superheater tubes and exhaust systems

Photo credit: Ugitech ©iStockphoto annavaczi

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TUBE PRODUCTS INTERNATIONAL September 2017

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