TY - JOUR A1 - Burkert, Andreas A1 - Lehmann, Jens A1 - Gümpel, P. A1 - Wilbert, Hans-Peter T1 - Edelstahl Rostfrei - Alternativen zu den Standardausteniten N2 - Die Rohstoffpreise sind seit einigen Jahren starken Schwankungen unterworfen und weisen insgesamt eine steigende Tendenz auf. Dies kommt gerade bei den weit ver-breiteten Standardausteniten durch äußerst volatile Legierungszuschläge zum Ausdruck, für die in erster Linie das Legierungselement Nickel (Ni) entscheidend ist. Die-ser Umstand führt bei immer mehr Verarbeitern von Edelstahl Rostfrei in Deutschland zur Suche nach alternativen Edelstahlgüten, um die Wettbewerbsfähigkeit auch zukünftig sicherzustellen. KW - Nichtrostender Stahl KW - Austenit KW - Ferrit KW - Lean Duplex KW - Korrosionsverhalten PY - 2012 SN - 0178-6571 VL - 06 SP - 52 EP - 55 PB - Montan- u. Wirtschaftsverlag GmbH CY - Düsseldorf AN - OPUS4-26030 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gümpel, P. A1 - Leu, F. A1 - Burkert, Andreas A1 - Lehmann, Jens T1 - Corrosion resistance of lean alloy alternatives for 300 series stainless steels N2 - Rising Prices of nickel and molybdenum in the past few years have led to unprecedented interest in Substitution of leaner-content alloys for Standard 300-series austenitic stainless steels in a lot of applications. Due to the high prices of different alloying elements and to periodic large fluctuations that cause similar large fluctuations in the costs of using 300-series stainless steels; a lot of new materials entered the markets in Europe and also in the rest of the world. A big disadvantage consists in the fact that there are though corrosion results that, however, a direct comparison of the corrosion resistance of these new materials does not exist up to now or only incompletely. In this project comparative investigations were carried out and always one or several representatives of a material group were incorporated. These material groups are: Lean Duplex Stainless Steels, Manganese Alloyed Austenitic and Duplex Stainless Steels and Ferritic Stainless Steels. These materials were investigated in a lot of different test procedures and in different conditions focused on the application in civil engineering and common use. Beside the electrochemical investigations all materials were exposed in different surface States in the atmosphere, once in Coastal nearness and once in a city centre area. Other exposition tests with material Coupons where done in the atmosphere of indoor swimming pools and at the case of food processing machines were corrosion processes are caused by the cleaning procedure. First results are reported. T2 - 7th European stainless steel conference - science and market CY - Como, Italy DA - 21.09.2011 KW - Austenitic stainless steels KW - Ferritic stainless steels KW - Duplex stainless steels KW - Manganese alloyed stainless steels KW - Pitting corrosion KW - Stress corrosion cracking KW - Passive layer KW - Surface condition PY - 2011 SN - 978-88-85298-84-2 IS - Applications / No. 53 SP - 1 EP - 15 AN - OPUS4-24803 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Burkert, Andreas A1 - Lehmann, Jens A1 - Burkert, Annette A1 - Gümpel, P. T1 - Substitution von Standardausteniten - Welches Potenzial bieten nickelreduzierte Legierungen? T2 - 12. Tagung Korrosionsschutz in der maritimen Technik CY - Hamburg, Germany DA - 2013-01-23 KW - Korrosion KW - Nichtrostender Stahl KW - Duplexstahl KW - Ferritischer Stahl PY - 2013 SP - 5 EP - 21 CY - Hamburg AN - OPUS4-27721 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Gümpel, P. A1 - Leu, F. A1 - Burkert, Andreas A1 - Lehmann, Jens T1 - New lean alloy alternatives for 300 series stainless steels - a corrosion perspective KW - Austenitic stainless steels KW - Ferritic stainless steels KW - Duplex stainless steels KW - Manganese alloyed stainless steels KW - Pitting corrosion KW - Stress corrosion cracking KW - Passive layer KW - Surface condition PY - 2012 SN - 1906-151X VL - 5 IS - 4 SP - 29 EP - 42 PB - King Mongkut's University of Technology CY - North Bangkok AN - OPUS4-29066 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Gümpel, P. A1 - Leu, F. A1 - Burkert, Andreas A1 - Lehmann, Jens A1 - Burkert, Annette T1 - Korrosionsbeständigkeit von Alternativwerkstoffen zu den klassischen nichtrostenden, austenitischen Stählen N2 - In einer umfangreichen Untersuchung konnte gezeigt werden, dass es aus korrosionstechnischer Sicht sehr gute, schwächer legierte Alternativwerkstoffe zu den heute überwiegend eingesetzten nichtrostenden CrNi- und CrNiMo-Stählen gibt und dass sich hierdurch ein wirtschaftlicher Vorteil generieren lässt. KW - Korrosion KW - Duplexstahl KW - Ferritischer Stahl PY - 2012 SN - 1432-9174 VL - 39 IS - März SP - 12 EP - 19 PB - Koordinierungsstelle CY - Mannheim AN - OPUS4-26744 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Burkert, Andreas A1 - Lehmann, Jens A1 - Burkert, Annette A1 - Mietz, Jürgen A1 - Gümpel, P. T1 - Technische und wirtschaftliche Alternativen zu den klassischen nichtrostenden, austenitischen Stählen unter atmosphärischen Einsatzbedingungen N2 - Durch systematische Labor- und Auslagerungsuntersuchungen ist es möglich, sieben unterschiedliche nichtrostende Stahllegierungen hinsichtlich verschiedenster Anwendungen untereinander und auch in Bezug auf zwei austenitische Standardwerkstoffe (1.4301, 1.4404) zu vergleichen. Die parallele Untersuchung von fünf verschiedenen Oberflächenausführungen der jeweiligen Werkstoffe ermöglicht zudem, branchenspezifische Besonderheiten der Oberflächenausführung beim Werkstoffvergleich zu berücksichtigen. Der Einfluss der Oberflächenausführung wird überwiegend bei den Ergebnissen der Auslagerungsversuche in kritischen Atmosphären sichtbar, weniger bei den elektrochemischen Untersuchungen. Die drei Vertreter aus dem Bereich der Duplexstähle zeigten unter den meisten Untersuchungsbedingungen eine hervorragende Korrosionsbeständigkeit. Insbesondere für Anwendungen im Bauwesen können die Lean-Duplexstähle deutliche Vorteile bieten. Der Manganaustenit 1.4376 sowie der Ferrit 1.4509 sind nur eingeschränkt als Alternativen geeignet, da die Werkstoffe bei einigen Versuchen signifikante Schwächen zeigten.--------------------------------------------------------------------------- The systematic laboratory and field exposure tests allow to compare seven different stainless steels among each other and also regarding two standard austenitic materials (1.4301, 1.4401) with respect to various applications. Parallel investigations with five different surface finishes of the respective materials enable to consider also industry-specific features of the surface finish. The influence of the surface finish can mainly be seen in the results of the exposure tests in critical atmospheres and less in the electrochemical investigations. The three duplex stainless steels showed under most of the test conditions excellent corrosion resistance. Especially for applications in civil engineering the lean duplex steels offer clear advantages. The manganese alloyed 1.4376 and the ferritic steel 1.4509 are only limited suitable as alternatives as these materials showed significant weaknesses in some of the tests. KW - Nichtrostende Stähle KW - Bauwesen KW - Atmosphärische Korrosion PY - 2012 DO - https://doi.org/10.1002/stab.201201624 SN - 0038-9145 SN - 1437-1049 SN - 0932-6375 VL - 81 IS - 11 SP - 875 EP - 888 PB - Ernst CY - Berlin AN - OPUS4-26825 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Gümpel, P. A1 - Leu, F. A1 - Burkert, Andreas A1 - Lehmann, Jens A1 - Karpenko, M. T1 - Corrosion resistance of lean alloy alternatives for 300 series stainless steels - Part 2 N2 - The second part of this paper looks continues the comparative investigation of lean duplex stainless steels, manganese alloyed austenitic and duplex stainless steels and ferritic stainless steels. These new materials were investigated in many different test procedures and in different conditions focused on the application in civil engineering and common use. In addition to electrochemical investigations, all materials were exposed to atmospheric conditions in different surface states. In Part 2, Prof. Gümpel and his team examine the effects of coastal and urban atmospheres on the samples, and presents their final conclusions. KW - Nichtrostender Stahl KW - Duplex KW - Korrosion KW - Beständigkeit KW - Austenitic KW - Ferritic KW - Duplex KW - Manganese alloyed KW - Pitting corrosion KW - Stress corrosion cracking KW - Passive layer KW - Surface condition PY - 2014 SN - 1383-7184 IS - July/August SP - 49 EP - 52 PB - KCI Publ. BV CY - Zutphen AN - OPUS4-31348 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Gümpel, P. A1 - Leu, F. A1 - Burkert, Andreas A1 - Lehmann, Jens A1 - Karpenko, M. T1 - Corrosion resistance of lean alloy alternatives for 300 series stainless steels - Part 1 N2 - Rising prices of nickel and molybdenum in the recent past years have led to unprecedented interest in substituting leaner-content alloys for standard 300-series austenitic stainless steels in many applications. Due to the price volatility of various alloying elements, many new materials have entered the market, yet no direct comparison of corrosion resistance of these new materials exists. In this project, comparative investigations were carried out and in each case one or several representatives of a material group were taken into account. The material groups covered were: lean duplex stainless steels, manganese alloyed austenitic and duplex stainless steels and ferritic stainless steels. In addition to electrochemical investigations, all materials were exposed to various atmospheric conditions in different surface states. KW - Nichtrostender Stahl KW - Duplex KW - Korrosion KW - Beständigkeit PY - 2014 SN - 1383-7184 IS - June SP - 42 EP - 46 PB - KCI Publ. BV CY - Zutphen AN - OPUS4-30902 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Burkert, Andreas A1 - Lehmann, Jens A1 - Burkert, Annette A1 - Mietz, Jürgen A1 - Gümpel, P. T1 - Technical and economical stainless steel alternatives for civil engineering applications N2 - Systematic laboratory and field exposure tests allow to compare nine different stainless steels (three ferritic, three austenitic, and three duplex grades) for civil engineering applications. The influence of surface finish was also taken into account by choosing five different industry-specific features. The three duplex stainless steels revealed excellent corrosion resistance under most of the test conditions. Especially for applications in civil engineering the lean duplex steels offer distinct advantages. The manganese-alloyed 1.4376 and the ferritic steel 1.4509 cannot be recommended as alternative materials as they did not perform satisfactorily. KW - Atmospheric corrosion KW - Duplex stainless steels KW - Exposure tests KW - Surface finish PY - 2014 DO - https://doi.org/10.1002/maco.201307057 SN - 0947-5117 SN - 1521-4176 VL - 65 IS - 11 SP - 1080 EP - 1095 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-32350 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -