{"id":2117,"date":"2021-03-19T08:51:44","date_gmt":"2021-03-19T08:51:44","guid":{"rendered":"https:\/\/wldstainless.com\/?p=2117"},"modified":"2021-03-19T08:51:44","modified_gmt":"2021-03-19T08:51:44","slug":"stainless-steel-321-vs-347","status":"publish","type":"post","link":"https:\/\/wldstainless.com\/de\/stainless-steel-321-vs-347\/","title":{"rendered":"Edelstahl 321 VS 347"},"content":{"rendered":"<p>Die Eigenschaften von Edelstahl 321 und Edelstahl 347 sind in den meisten F\u00e4llen \u00e4hnlich. Der Edelstahl 321 ist eine Art Titan \u2013 die Stabilisierung des austenitischen Stahls 18\/8 (304). Eine kleine Menge von Titan sorgt f\u00fcr eine Korngr\u00f6\u00dfe im Bereich der Karbid-F\u00e4llungstemperatur, das hei\u00dft 425\u2013850 \u00b0C. Nach dem Erhitzen tritt keine interkristalline Korrosion auf, und er weist eine gute Festigkeit und Best\u00e4ndigkeit gegen Oxidation und w\u00e4ssrige Korrosion auf.<\/p>\n<p>Die 321H ist eine Hochkohlenstoffversion der 321 mit h\u00f6herer Hochtemperaturfestigkeit und wird haupts\u00e4chlich f\u00fcr Hochtemperaturanwendungen bei Temperaturen um 900 \u00b0C eingesetzt. Der Nachteil von 321 ist, dass Titan eine schlechte Schwei\u00dfstrom\u00fcbergangsf\u00e4higkeit aufweist, weshalb er nicht als Schwei\u00dfmaterial verwendet werden kann. 347 enth\u00e4lt hingegen Niob und spielt dabei die Rolle der Karbidstabilisierung und kann ebenfalls \u00fcber den Schwei\u00dfstrom \u00fcbertragen werden. 347 ist der Standardschwei\u00dfstoff f\u00fcr die Schwei\u00dfung von rostfreiem Stahl 321 und wird gelegentlich als Grundmetall verwendet. Sehen Sie sich die chemischen und mechanischen Eigenschaften unten an:<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Vergleich der chemischen Zusammensetzung<\/strong><\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"77\">Noten<\/td>\n<td width=\"77\">C<\/td>\n<td width=\"77\">Mn<\/td>\n<td width=\"77\">Si<\/td>\n<td width=\"77\">P<\/td>\n<td width=\"77\">S<\/td>\n<td width=\"77\">Cr<\/td>\n<td width=\"77\">Ni<\/td>\n<td width=\"77\">Mo<\/td>\n<td width=\"77\">N<\/td>\n<td width=\"77\">Andere<\/td>\n<\/tr>\n<tr>\n<td width=\"77\">321<\/td>\n<td width=\"77\">0.08<\/td>\n<td width=\"77\">2.00<\/td>\n<td width=\"77\">0.75<\/td>\n<td width=\"77\">0.045<\/td>\n<td width=\"77\">0.03<\/td>\n<td width=\"77\">17.0-19.0<\/td>\n<td width=\"77\">9.0-12.0<\/td>\n<td width=\"77\">\/<\/td>\n<td width=\"77\">0.1<\/td>\n<td width=\"77\">Ti = 5(C + N)0,7<\/td>\n<\/tr>\n<tr>\n<td width=\"77\">347<\/td>\n<td width=\"77\">0.08<\/td>\n<td width=\"77\">2.00<\/td>\n<td width=\"77\">0.75<\/td>\n<td width=\"77\">0.045<\/td>\n<td width=\"77\">0.03<\/td>\n<td width=\"77\">17.0-19.0<\/td>\n<td width=\"77\">9.0-13.0<\/td>\n<td width=\"77\">\/<\/td>\n<td width=\"77\">\/<\/td>\n<td width=\"77\">Nb = 10(C + N) 1,0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Wir sehen, dass der Unterschied zwischen ihnen durch die Zugabe von Ti und Nb entsteht. Aufgrund der Zugabe des stabilisierten Elements Titan kann der 321 bei Temperaturen von 426 bis 815 \u00b0C gegen die Bildung von Chromkarbid resistieren, weshalb er eine hervorragende Interkristallkorrosionsbest\u00e4ndigkeit sowie hohe Temperaturbest\u00e4ndigkeit aufweist und h\u00f6here Reibungs- und Spannbruchfestigkeiten als 304 und 304L aufweist. Dar\u00fcber hinaus weist der 321 auch eine gute niedrige Temperaturfestigkeit sowie hervorragende Formbarkeit und Schwei\u00dfverarbeitungscharakteristika auf, ohne nach dem Schwei\u00dfen zu annehen.<\/p>\n<p>347 Edelstahl ist ein austenitischer Edelstahl mit Niobanteil und 347H ist die Hochkohlenstoffversion. 347 kann als Niobium-haltige Variante auf Basis von 304 betrachtet werden. Niob, ein seltener Erdenmetall, wirkt \u00e4hnlich wie Titan bei der Verfeinerung von Korngr\u00f6\u00dfen, widersteht interk\u00f6rniger Korrosion und f\u00f6rdert die Alterungsh\u00e4rtung.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Vergleich der physikalischen Eigenschaften<\/strong><\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"170\">Noten<\/td>\n<td width=\"170\">Dehnfestigkeit, MPa<\/td>\n<td width=\"170\">Zugfestigkeit, MPa<\/td>\n<td width=\"170\">Verl\u00e4ngerung (50 mm)<\/td>\n<td width=\"170\">H\u00e4rte, HB<\/td>\n<\/tr>\n<tr>\n<td width=\"170\">321<\/td>\n<td width=\"170\">515<\/td>\n<td width=\"170\">205<\/td>\n<td width=\"170\">40<\/td>\n<td width=\"170\">217<\/td>\n<\/tr>\n<tr>\n<td width=\"170\">347<\/td>\n<td width=\"170\">515<\/td>\n<td width=\"170\">205<\/td>\n<td width=\"170\">40<\/td>\n<td width=\"170\">201<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p><strong>Typische Anwendungen<\/strong><\/p>\n<p>Edelstahl 347&amp;347H weist eine bessere Hochtemperaturbest\u00e4ndigkeit als 304 und 321 auf. Er wird in der Luftfahrt, in der Petrochemie, in der Lebensmittelindustrie, in der Papierherstellung und in anderen Branchen wie Abgaskanalen und Nebenrohren von Flugmotoren, in Hei\u00dfgasleitungen von Turbomaschinen und in Teilen, die bei niedriger Last und Temperaturen unter 850 \u00b0C arbeiten, weit verbreitet.<\/p>\n<p>Durch die Zugabe von Titan an 321 wird es f\u00fcr Anwendungen mit hohen Temperaturen und guter Korrosionsbest\u00e4ndigkeit geeigneter. Es eignet sich f\u00fcr 304-sensibilisierte und 304L-Anwendungen mit unzureichender Hitzebest\u00e4ndigkeit. Typische Anwendungen sind thermische Dehnungsanschl\u00fcsse, Balgen, Komponenten des Abgassystems von Flugzeugen, Hitzeschutzh\u00fclsen f\u00fcr Heizelemente, Ofenkomponenten und W\u00e4rmetauscher.<\/p>","protected":false},"excerpt":{"rendered":"<p>The property of 321 stainless steel and 347 stainless steel is similar in most cases, the 321 stainless steel is a kind of titanium &#8211; stabilization of 18\/8 austenitic stainless steel (304), a small amount of titanium makes it in carbide precipitation temperature range, that&#8217;s 425-850\u2103, not appear intergranular corrosion after heating, with good strength, [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2117","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - 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