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1. WO2021037926 - AUSTENITIC STEEL ALLOY HAVING AN IMPROVED CORROSION RESISTANCE UNDER HIGH-TEMPERATURE LOADING AND METHOD FOR PRODUCING A TUBULAR BODY THEREFROM

Publication Number WO/2021/037926
Publication Date 04.03.2021
International Application No. PCT/EP2020/073877
International Filing Date 26.08.2020
IPC
C22C 38/00 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
C22C 38/02 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
02containing silicon
C22C 38/04 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
04containing manganese
C22C 38/48 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
40with nickel
48with niobium or tantalum
C22C 38/58 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
40with nickel
58with more than 1.5% by weight of manganese
F24S 20/20 2018.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
24HEATING; RANGES; VENTILATING
SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
20Solar heat collectors specially adapted for particular uses or environments
20Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
CPC
C21D 2211/001
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
2211Microstructure comprising significant phases
001Austenite
C22C 38/001
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
001containing N
C22C 38/02
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
02containing silicon
C22C 38/04
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
04containing manganese
C22C 38/48
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
40with nickel
48with niobium or tantalum
C22C 38/58
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
40with nickel
58with more than 1.5% by weight of manganese
Applicants
  • MANNESMANN STAINLESS TUBES GMBH [DE]/[DE]
Inventors
  • SPIEGEL, Michael
  • SCHRAVEN, Patrik
Agents
  • MOSER GÖTZE & PARTNER PATENTANWÄLTE MBB
Priority Data
10 2019 123 174.429.08.2019DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) AUSTENITISCHE STAHLLEGIERUNG MIT VERBESSERTER KORROSIONSBESTÄNDIGKEIT BEI HOCHTEMPERATURBEANSPRUCHUNG UND VERFAHREN ZUR HERSTELLUNG EINES ROHRKÖRPERS HIERAUS
(EN) AUSTENITIC STEEL ALLOY HAVING AN IMPROVED CORROSION RESISTANCE UNDER HIGH-TEMPERATURE LOADING AND METHOD FOR PRODUCING A TUBULAR BODY THEREFROM
(FR) ALLIAGE D'ACIER AUSTÉNITIQUE AYANT UNE RÉSISTANCE À LA CORROSION AMÉLIORÉE SOUS CHARGE À HAUTE TEMPÉRATURE ET PROCÉDÉ DE PRODUCTION D'UN CORPS TUBULAIRE À PARTIR DE CE DERNIER
Abstract
(DE)
Die Erfindung betrifft eine austenitische Stahllegierung. Um eine austenitische Stahllegierung mit hervorragender Korrosionsbeständigkeit bei Hochtemperaturbeanspruchungen von über 600 °C bis zu 800 °C zu schaffen, wird folgende chemische Zusammensetzung in Gewichts-% vorgeschlagen, im Wesentlichen bestehend: C: 0,01 bis 0,10; Si: max. 0,75; Mn: max. 2,00; P: max. 0,03; S: max. 0,03; Cr: 23 bis 27; Ni: 17 bis 23; Nb: 0,2 bis 0,6; N: 0,15 bis 0,35; Rest Eisen mit erschmelzungsbedingten Verunreinigungen. Auch betrifft die Erfindung einen rohrförmigen Körper aus dieser Stahllegierung, ein Absorberrohr eines Solarreceivers einer Solarkraftanlage aus diesem rohrförmigen Körper, einen Solarreceiver mit diesem Absorberrohr und ein Verfahren zur Herstellung eines Rohrkörpers aus dieser Stahllegierung.
(EN)
The invention relates to an austenitic steel alloy. The aim of the invention is to provide an austenitic steel alloy having an excellent corrosion resistance under high-temperature loading of more than 600 °C and up to 800 °C. In order to achieve this aim, the following chemical composition (in wt.%) is proposed, consisting essentially of: C: 0.01 to 0.10; Si: max. 0.75; Mn: max. 2.00; P: max. 0.03; S: max. 0.03; Cr: 23 to 27; Ni: 17 to 23; Nb: 0.2 to 0.6; N: 0.15 to 0.35; the remainder being Fe and melting-related impurities. The invention also relates to a tubular body made from this steel alloy, to an absorber pipe of a solar receiver of a solar power installation made from this tubular body, to a solar receiver comprising this absorber pipe and to a method for producing a tubular body from this steel alloy.
(FR)
L'invention concerne un alliage d'acier austénitique. Le but de l'invention est de fournir un alliage d'acier austénitique présentant une excellente résistance à la corrosion sous charge à haute température de plus de 600 °C jusqu'à 800 °C. Afin d'atteindre cet objectif, la composition chimique suivante (en % en poids) est proposée, consistant essentiellement en : C : 0,01 à 0,10 ; Si : max. 0,75 ; Mn : max. 2,00 ; P : max. 0,03 ; S : max. 0,03 ; Cr : 23 à 27 ; Ni : 17 à 23 ; Nb : 0,2 à 0,6 ; N : 0,15 à 0,35 ; le reste étant du Fe et des impuretés liées à la fusion. L'invention concerne également un corps tubulaire réalisé à partir de cet alliage d'acier, un tuyau d'absorption d'un récepteur solaire d'une installation d'énergie solaire fabriqué à partir de ce corps tubulaire, un récepteur solaire comprenant ce tuyau d'absorption et un procédé de fabrication d'un corps tubulaire à partir de cet alliage d'acier.
Also published as
Latest bibliographic data on file with the International Bureau