{"id":4008,"date":"2024-06-29T15:49:00","date_gmt":"2024-06-29T15:49:00","guid":{"rendered":"https:\/\/machining-quote.com\/?p=4008"},"modified":"2024-07-09T09:34:35","modified_gmt":"2024-07-09T09:34:35","slug":"440-stainless-steel-vs-304","status":"publish","type":"post","link":"https:\/\/machining-quote.com\/cs\/bolg\/440-stainless-steel-vs-304\/","title":{"rendered":"440 Nerezov\u00e1 ocel vs 304: V\u0161e, co pot\u0159ebujete v\u011bd\u011bt"},"content":{"rendered":"<h4>Obsah<\/h4>\n<ul>\n<li><a href=\"#ss420-and-ss304-which-is-better\">SS420 a SS304: Co je lep\u0161\u00ed?<\/a><\/li>\n<li><a href=\"#disadvantages-and-advantages-of-using-304-vs-440-stainless-steel\">Nev\u00fdhody a v\u00fdhody pou\u017eit\u00ed nerezov\u00e9 oceli 304 vs 440<\/a><\/li>\n<li><a href=\"#applications-where-to-use-440-vs-304-stainless-steel\">Pou\u017eit\u00ed: Kde pou\u017e\u00edt Nerezov\u00e1 ocel 440 vs 304<\/a><\/li>\n<li><a href=\"#corrosion-resistance-440-stainless-steel-vs-304\">Odolnost proti korozi: 440 nerezov\u00e1 ocel vs 304<\/a><\/li>\n<li><a href=\"#composition-differences-between-440-and-304-stainless-steel\">Rozd\u00edly ve slo\u017een\u00ed Mezi 440 a 304 Nerezov\u00e1 ocel<\/a><\/li>\n<li><a href=\"#mechanical-properties-comparing-440-and-304-stainless-steel\">Mechanick\u00e9 vlastnosti: Porovn\u00e1n\u00ed nerezov\u00e9 oceli 440 a 304<\/a><\/li>\n<li><a href=\"#machinability-and-formability-440-vs-304-stainless-steel\">Obrobitelnost a tvarovatelnost: Nerezov\u00e1 ocel 440 vs 304<\/a><\/li>\n<li><a href=\"#heat-treatment-processes-for-440-and-304-stainless-steel\">Procesy tepeln\u00e9ho zpracov\u00e1n\u00ed pro nerezovou ocel 440 a 304<\/a><\/li>\n<li><a href=\"#summary-chart-of-what-is-the-difference-between-304-and-420-stainless-steel\">Souhrnn\u00e1 tabulka rozd\u00edl\u016f mezi nerezovou ocel\u00ed 304 a 440<\/a><\/li>\n<li><a href=\"#conclusion\">Z\u00e1v\u011br<\/a><\/li>\n<\/ul>\n<p>\u201eNerezov\u00e1 ocel 440 vs 304: Odhalen\u00ed odolnosti, v\u00fdkonu a aplikac\u00ed\u201c<\/p>\n<p>Nerezov\u00e1 ocel 440 a nerezov\u00e1 ocel 304 jsou dva z nej\u010dast\u011bji pou\u017e\u00edvan\u00fdch materi\u00e1l\u016f p\u0159i v\u00fdrob\u011b \u0161irok\u00e9 \u0161k\u00e1ly produkt\u016f, od kuchy\u0148sk\u00fdch n\u00e1stroj\u016f po pr\u016fmyslov\u00e9 stroje. Ka\u017ed\u00fd typ nerezov\u00e9 oceli nab\u00edz\u00ed jedine\u010dn\u00fd soubor charakteristik a v\u00fdhod, d\u00edky \u010demu\u017e jsou vhodn\u00e9 pro r\u016fzn\u00e9 aplikace v z\u00e1vislosti na podm\u00ednk\u00e1ch prost\u0159ed\u00ed, mechanick\u00fdch po\u017eadavc\u00edch a n\u00e1kladech. Pochopen\u00ed rozd\u00edl\u016f mezi nerezav\u011bj\u00edc\u00ed ocel\u00ed 440 a 304 je z\u00e1sadn\u00ed pro v\u00fdb\u011br vhodn\u00e9ho materi\u00e1lu pro konkr\u00e9tn\u00ed aplikaci, zaji\u0161t\u011bn\u00ed odolnosti, funk\u010dnosti a n\u00e1kladov\u00e9 efektivity. Tento \u010dl\u00e1nek zkoum\u00e1 kl\u00ed\u010dov\u00e9 vlastnosti, aplikace a rozd\u00edly mezi nerezov\u00fdmi ocelmi 440 a 304, aby poskytl komplexn\u00ed pochopen\u00ed obou materi\u00e1l\u016f.<\/p>\n<h2 id=\"ss420-and-ss304-which-is-better\">SS420 a SS304: Co je lep\u0161\u00ed?<\/h2>\n<h3>Vlastnosti nerezov\u00e9 oceli 440<\/h3>\n<p>Nerezov\u00e1 ocel 440, \u010dasto ozna\u010dovan\u00e1 jako 440C, je martenzitick\u00e1 nerezov\u00e1 ocel s vysok\u00fdm obsahem uhl\u00edku zn\u00e1m\u00e1 svou vysokou pevnost\u00ed, m\u00edrnou odolnost\u00ed proti korozi a vynikaj\u00edc\u00ed tvrdost\u00ed a odolnost\u00ed proti opot\u0159eben\u00ed. Vy\u0161\u0161\u00ed obsah uhl\u00edku v nerezov\u00e9 oceli 440 umo\u017e\u0148uje v\u00fdrazn\u00e9 zv\u00fd\u0161en\u00ed tvrdosti a pevnosti pomoc\u00ed tepeln\u00e9ho zpracov\u00e1n\u00ed. D\u00edky tomu je zvl\u00e1\u0161t\u011b vhodn\u00fd pro aplikace vy\u017eaduj\u00edc\u00ed ostr\u00e9 a odoln\u00e9 ost\u0159\u00ed, jako jsou no\u017ee, \u0159ezn\u00e9 n\u00e1stroje a chirurgick\u00e9 n\u00e1stroje. Tato zv\u00fd\u0161en\u00e1 tvrdost v\u0161ak p\u0159ich\u00e1z\u00ed na \u00fakor sn\u00ed\u017een\u00e9 odolnosti proti korozi ve srovn\u00e1n\u00ed s ni\u017e\u0161\u00edmi t\u0159\u00eddami uhl\u00edku, tak\u017ee je m\u00e9n\u011b ide\u00e1ln\u00ed pro pou\u017eit\u00ed ve vysoce korozivn\u00edch prost\u0159ed\u00edch.<\/p>\n<h3>304 Vlastnosti nerezov\u00e9 oceli<\/h3>\n<p>Naproti tomu nerezov\u00e1 ocel 304, sou\u010d\u00e1st austenitick\u00e9 rodiny, je zn\u00e1m\u00e1 svou vynikaj\u00edc\u00ed odolnost\u00ed proti korozi a pozoruhodnou tvarovatelnost\u00ed. Nerezov\u00e1 ocel 304, slo\u017een\u00e1 z chromu 18% a niklu 8%, nab\u00edz\u00ed vyv\u00e1\u017eenou kombinaci pevnosti a odolnosti proti korozi bez nutnosti tepeln\u00e9ho zpracov\u00e1n\u00ed. Tato t\u0159\u00edda je v\u00fdjime\u010dn\u011b v\u0161estrann\u00e1 a b\u011b\u017en\u011b se pou\u017e\u00edv\u00e1 v kuchy\u0148sk\u00e9m vybaven\u00ed, automobilov\u00fdch sou\u010d\u00e1stech a architektonick\u00fdch prvc\u00edch. D\u00edky ni\u017e\u0161\u00edmu obsahu uhl\u00edku je nerezov\u00e1 ocel 304 ta\u017en\u011bj\u0161\u00ed ne\u017e ocel 440, co\u017e umo\u017e\u0148uje jej\u00ed tvarov\u00e1n\u00ed do r\u016fzn\u00fdch tvar\u016f a velikost\u00ed, ani\u017e by byla ohro\u017eena jej\u00ed struktur\u00e1ln\u00ed integrita.<\/p>\n<h3>V\u00fdb\u011br spr\u00e1vn\u00e9 oceli<\/h3>\n<p>Volba mezi nerezovou ocel\u00ed 440 a 304 nakonec z\u00e1vis\u00ed na konkr\u00e9tn\u00edch po\u017eadavc\u00edch aplikace. Pro prost\u0159ed\u00ed, kde jsou pevnost a tvrdost prvo\u0159ad\u00e9 a koroze je m\u00e9n\u011b znepokojuj\u00edc\u00ed, je nerezov\u00e1 ocel 440 nepochybn\u011b nejlep\u0161\u00ed volbou. Jeho schopnost udr\u017eet ostrou hranu v n\u00e1ro\u010dn\u00fdch podm\u00ednk\u00e1ch z n\u011bj \u010din\u00ed nepostradateln\u00fd p\u0159i v\u00fdrob\u011b vysoce kvalitn\u00edch \u010depel\u00ed a n\u00e1stroj\u016f.<\/p>\n<p>Naopak pro aplikace, kter\u00e9 vy\u017eaduj\u00ed vy\u0161\u0161\u00ed odolnost proti korozi a tvarovatelnost, je v\u00fdhodn\u011bj\u0161\u00ed nerezov\u00e1 ocel 304. Jeho odolnost v\u016f\u010di \u0161irok\u00e9mu spektru chemik\u00e1li\u00ed a atmosf\u00e9rick\u00fdch podm\u00ednek spolu se snadnou v\u00fdrobou ho \u010din\u00ed vhodn\u00fdm pro \u0161irok\u00e9 spektrum aplikac\u00ed, od dom\u00e1c\u00edch spot\u0159ebi\u010d\u016f po pr\u016fmyslov\u00e1 za\u0159\u00edzen\u00ed. Nav\u00edc estetick\u00e1 p\u0159ita\u017elivost nerezov\u00e9 oceli 304 d\u00edky jej\u00edmu sv\u011btl\u00e9mu povrchu, kter\u00fd se snadno udr\u017euje, z n\u00ed d\u011bl\u00e1 obl\u00edbenou volbu pro dekorativn\u00ed a architektonick\u00e9 aplikace.<\/p>\n<h2 id=\"disadvantages-and-advantages-of-using-304-vs-440-stainless-steel\">Nev\u00fdhody a v\u00fdhody pou\u017eit\u00ed nerezov\u00e9 oceli 304 vs 440<\/h2>\n<h3>304 V\u00fdhody nerezov\u00e9 oceli<\/h3>\n<ul>\n<li>Vynikaj\u00edc\u00ed odolnost proti korozi<\/li>\n<li>Pozoruhodn\u00e1 v\u0161estrannost a tvarovatelnost<\/li>\n<li>Nemagnetick\u00e9 vlastnosti<\/li>\n<li>Snadnost v\u00fdroby a sva\u0159ov\u00e1n\u00ed<\/li>\n<\/ul>\n<h3>304 Nev\u00fdhody nerezov\u00e9 oceli<\/h3>\n<ul>\n<li>Nevhodn\u00e9 pro prost\u0159ed\u00ed s vysokou teplotou (nad 800 \u00b0F)<\/li>\n<li>Ni\u017e\u0161\u00ed tvrdost a odolnost proti opot\u0159eben\u00ed ve srovn\u00e1n\u00ed s nerezovou ocel\u00ed 440<\/li>\n<\/ul>\n<h3>440 V\u00fdhody nerezov\u00e9 oceli<\/h3>\n<ul>\n<li>Vynikaj\u00edc\u00ed tvrdost a odolnost proti opot\u0159eben\u00ed<\/li>\n<li>Vynikaj\u00edc\u00ed pro vysoce nam\u00e1han\u00e9 aplikace<\/li>\n<li>Mo\u017enost tepeln\u00e9ho zpracov\u00e1n\u00ed pro zv\u00fd\u0161en\u00ed pevnosti<\/li>\n<\/ul>\n<h3>440 Nev\u00fdhody nerezov\u00e9 oceli<\/h3>\n<ul>\n<li>Ni\u017e\u0161\u00ed odolnost proti korozi ve srovn\u00e1n\u00ed s nerezovou ocel\u00ed 304<\/li>\n<li>N\u00e1ro\u010dn\u011bj\u0161\u00ed na obr\u00e1b\u011bn\u00ed a v\u00fdrobu<\/li>\n<\/ul>\n<h2 id=\"applications-where-to-use-440-vs-304-stainless-steel\">Pou\u017eit\u00ed: Kde pou\u017e\u00edt Nerezov\u00e1 ocel 440 vs 304<\/h2>\n<h3>Aplikace nerezov\u00e9 oceli 304<\/h3>\n<ul>\n<li>Kuchy\u0148sk\u00e9 spot\u0159ebi\u010de a n\u00e1dob\u00ed<\/li>\n<li>Architektonick\u00e9 oblo\u017een\u00ed a oblo\u017een\u00ed<\/li>\n<li>Automobilov\u00e9 a leteck\u00e9 komponenty<\/li>\n<li>L\u00e9ka\u0159sk\u00e1 za\u0159\u00edzen\u00ed a za\u0159\u00edzen\u00ed na zpracov\u00e1n\u00ed potravin<\/li>\n<\/ul>\n<h3>Aplikace nerezov\u00e9 oceli 440<\/h3>\n<ul>\n<li>\u0158ezn\u00e9 n\u00e1stroje a no\u017ee<\/li>\n<li>Chirurgick\u00e9 n\u00e1stroje<\/li>\n<li>Lo\u017eiska a dal\u0161\u00ed vysoce nam\u00e1han\u00e9 komponenty<\/li>\n<\/ul>\n<h2 id=\"corrosion-resistance-440-stainless-steel-vs-304\">Odolnost proti korozi: 440 nerezov\u00e1 ocel vs 304<\/h2>\n<h3>304 Nerezov\u00e1 ocel Odolnost proti korozi<\/h3>\n<p>Nerezov\u00e1 ocel 304, zn\u00e1m\u00e1 tak\u00e9 jako nerezov\u00e1 ocel 18\/8 d\u00edky sv\u00e9mu slo\u017een\u00ed z p\u0159ibli\u017en\u011b 18% chr\u00f3mu a 8% niklu, je zn\u00e1m\u00e1 pro svou vynikaj\u00edc\u00ed odolnost proti korozi. Tato slitina je austenitick\u00e1 nerezov\u00e1 ocel, co\u017e znamen\u00e1, \u017ee obsahuje vysok\u00e9 hladiny chr\u00f3mu a niklu ve srovn\u00e1n\u00ed s jin\u00fdmi typy nerezov\u00e9 oceli. P\u0159\u00edtomnost t\u011bchto prvk\u016f podporuje tvorbu pasivn\u00ed vrstvy oxidu chr\u00f3mu na povrchu oceli, kter\u00e1 p\u016fsob\u00ed jako \u0161t\u00edt proti korozi. Tato ochrann\u00e1 vrstva je vysoce \u00fa\u010dinn\u00e1 v \u0161irok\u00e9 \u0161k\u00e1le prost\u0159ed\u00ed, zejm\u00e9na v podm\u00ednk\u00e1ch, kter\u00e9 jsou m\u00e9n\u011b korozivn\u00ed.<\/p>\n<h3>440 Nerezov\u00e1 ocel Odolnost proti korozi<\/h3>\n<p>Na druh\u00e9 stran\u011b nerezov\u00e1 ocel 440 je martenzitick\u00fd typ, kter\u00fd obsahuje vy\u0161\u0161\u00ed obsah uhl\u00edku ve srovn\u00e1n\u00ed s ocel\u00ed 304. Typick\u00e9 t\u0159\u00eddy nerezov\u00e9 oceli 440 (440A, 440B a 440C) se li\u0161\u00ed p\u0159edev\u0161\u00edm obsahem uhl\u00edku; 440C s nejvy\u0161\u0161\u00edm obsahem uhl\u00edku a v d\u016fsledku toho dosahuje nejvy\u0161\u0161\u00ed tvrdosti a odolnosti proti opot\u0159eben\u00ed ze v\u0161ech t\u0159\u00ed. Vy\u0161\u0161\u00ed obsah uhl\u00edku u nerezov\u00e9 oceli 440 v\u0161ak obecn\u011b znamen\u00e1, \u017ee tyto slitiny jsou n\u00e1chyln\u011bj\u0161\u00ed ke korozi ne\u017e nerezov\u00e1 ocel 304. Tato n\u00e1chylnost je zp\u016fsobena ni\u017e\u0161\u00edm obsahem chr\u00f3mu na jednotku uhl\u00edku a nep\u0159\u00edtomnost\u00ed niklu, co\u017e sni\u017euje schopnost vytv\u00e1\u0159et pasivn\u00ed vrstvu oxidu chr\u00f3mu.<\/p>\n<h2 id=\"composition-differences-between-440-and-304-stainless-steel\">Rozd\u00edly ve slo\u017een\u00ed Mezi 440 a 304 Nerezov\u00e1 ocel<\/h2>\n<h3>304 Slo\u017een\u00ed nerezov\u00e9 oceli<\/h3>\n<ul>\n<li>Chrom: 18%<\/li>\n<li>Nikl: 8%<\/li>\n<li>Uhl\u00edk: &lt; 0,081 TP3T<\/li>\n<\/ul>\n<h3>440 Slo\u017een\u00ed nerezov\u00e9 oceli<\/h3>\n<ul>\n<li>Chrom: 16-18%<\/li>\n<li>Uhl\u00edk: 0,6-1,2%<\/li>\n<li>Nikl: 0%<\/li>\n<\/ul>\n<h2 id=\"mechanical-properties-comparing-440-and-304-stainless-steel\">Mechanick\u00e9 vlastnosti: Porovn\u00e1n\u00ed nerezov\u00e9 oceli 440 a 304<\/h2>\n<table border=\"1\">\n<tbody>\n<tr>\n<th>Majetek<\/th>\n<th>440 Nerezov\u00e1 ocel<\/th>\n<th>304 Nerezov\u00e1 ocel<\/th>\n<\/tr>\n<tr>\n<td>Tvrdost<\/td>\n<td>Vy\u0161\u0161\u00ed<\/td>\n<td>Doln\u00ed<\/td>\n<\/tr>\n<tr>\n<td>Pevnost v tahu<\/td>\n<td>Vy\u0161\u0161\u00ed<\/td>\n<td>Doln\u00ed<\/td>\n<\/tr>\n<tr>\n<td>Odolnost proti korozi<\/td>\n<td>Doln\u00ed<\/td>\n<td>Vy\u0161\u0161\u00ed<\/td>\n<\/tr>\n<tr>\n<td>Tvarovatelnost<\/td>\n<td>Doln\u00ed<\/td>\n<td>Vy\u0161\u0161\u00ed<\/td>\n<\/tr>\n<tr>\n<td>Obrobitelnost<\/td>\n<td>N\u00e1ro\u010dn\u011bj\u0161\u00ed<\/td>\n<td>Jednodu\u0161\u0161\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"machinability-and-formability-440-vs-304-stainless-steel\">Obrobitelnost a tvarovatelnost: Nerezov\u00e1 ocel 440 vs 304<\/h2>\n<h3>Obrobitelnost<\/h3>\n<p>Nerezov\u00e1 ocel 440, kter\u00e1 pat\u0159\u00ed do \u0159ady 440 martenzitick\u00fdch vysoce uhl\u00edkov\u00fdch nerezov\u00fdch ocel\u00ed, obvykle zahrnuje t\u0159\u00eddy jako 440A, 440B a 440C, p\u0159i\u010dem\u017e 440C je nejtvrd\u0161\u00ed. Tento vysok\u00fd obsah uhl\u00edku dod\u00e1v\u00e1 oceli v\u011bt\u0161\u00ed pevnost a odolnost proti opot\u0159eben\u00ed, co\u017e je v\u00fdhodn\u00e9 pro v\u00fdrobu \u0159ezn\u00fdch n\u00e1stroj\u016f a odoln\u00fdch d\u00edl\u016f. Tato stejn\u00e1 vlastnost v\u0161ak tak\u00e9 \u010din\u00ed nerezovou ocel 440 obecn\u011b n\u00e1ro\u010dn\u011bj\u0161\u00ed na obr\u00e1b\u011bn\u00ed ne\u017e nerezovou ocel 304. Vy\u0161\u0161\u00ed tvrdost oceli 440 znamen\u00e1, \u017ee m\u00e1 tendenci rychleji opot\u0159ebov\u00e1vat \u0159ezn\u00e9 n\u00e1stroje a vy\u017eaduje robustn\u011bj\u0161\u00ed obr\u00e1b\u011bc\u00ed za\u0159\u00edzen\u00ed nebo specifick\u00e9 obr\u00e1b\u011bc\u00ed techniky pro jej\u00ed efektivn\u00ed tvarov\u00e1n\u00ed.<\/p>\n<h3>Tvarovatelnost<\/h3>\n<p>Na druh\u00e9 stran\u011b nerezov\u00e1 ocel 304, co\u017e je austenitick\u00fd typ, je zn\u00e1m\u00e1 svou pozoruhodnou tvarovatelnost\u00ed a sva\u0159itelnost\u00ed, p\u0159ipisovanou ni\u017e\u0161\u00edmu obsahu uhl\u00edku a vy\u0161\u0161\u00edmu obsahu chr\u00f3mu a niklu. Toto slo\u017een\u00ed nejen \u010din\u00ed nerezovou ocel 304 m\u00e9n\u011b n\u00e1chylnou ke korozi, ale tak\u00e9 v\u00fdrazn\u011b usnad\u0148uje pr\u00e1ci s n\u00ed b\u011bhem obr\u00e1b\u011bc\u00edch operac\u00ed. Je m\u011bk\u010d\u00ed ne\u017e nerezov\u00e1 ocel 440, co\u017e znamen\u00e1, \u017ee neopot\u0159ebov\u00e1v\u00e1 \u0159ezn\u00e9 n\u00e1stroje tak rychle, co\u017e umo\u017e\u0148uje p\u0159\u00edmo\u010da\u0159ej\u0161\u00ed a n\u00e1kladov\u011b efektivn\u011bj\u0161\u00ed obr\u00e1b\u011bn\u00ed. To je zvl\u00e1\u0161t\u011b v\u00fdhodn\u00e9 v aplikac\u00edch vy\u017eaduj\u00edc\u00edch rozs\u00e1hl\u00e9 tv\u00e1\u0159en\u00ed a sva\u0159ov\u00e1n\u00ed, co\u017e z nerezov\u00e9 oceli 304 \u010din\u00ed preferovanou volbu v pr\u016fmyslov\u00fdch odv\u011btv\u00edch, jako je potravin\u00e1\u0159sk\u00fd a farmaceutick\u00fd pr\u016fmysl, kde je prioritou \u010distota a snadn\u00e1 v\u00fdroba.<\/p>\n<h2 id=\"heat-treatment-processes-for-440-and-304-stainless-steel\">Procesy tepeln\u00e9ho zpracov\u00e1n\u00ed pro nerezovou ocel 440 a 304<\/h2>\n<h3>Tepeln\u00e9 zpracov\u00e1n\u00ed nerezov\u00e9 oceli 440<\/h3>\n<p>Nerezov\u00e1 ocel 440, zn\u00e1m\u00e1 sv\u00fdm vysok\u00fdm obsahem uhl\u00edku, je klasifikov\u00e1na jako martenzitick\u00e1 slitina a je zn\u00e1m\u00e1 svou pevnost\u00ed a tvrdost\u00ed. Proces tepeln\u00e9ho zpracov\u00e1n\u00ed nerezov\u00e9 oceli 440 typicky zahrnuje zah\u0159\u00e1t\u00ed oceli na teplotn\u00ed rozsah 925-1065 \u00b0C, po kter\u00e9m n\u00e1sleduje kalen\u00ed, kter\u00e9 zahrnuje rychl\u00e9 ochlazen\u00ed pomoc\u00ed vzduchu nebo oleje. Tento proces kalen\u00ed je kritick\u00fd, proto\u017ee p\u0159em\u011b\u0148uje ocel na martenzit, velmi tvrdou krystalickou strukturu. Po kalen\u00ed proch\u00e1z\u00ed nerezov\u00e1 ocel 440 temperov\u00e1n\u00edm, co\u017e je proces, kter\u00fd zahrnuje op\u011btovn\u00e9 zah\u0159\u00e1t\u00ed oceli na ni\u017e\u0161\u00ed teplotu, obvykle mezi 150-370 \u00b0C, v z\u00e1vislosti na po\u017eadovan\u00e9 \u00farovni tvrdosti. Temperov\u00e1n\u00ed je z\u00e1sadn\u00ed, proto\u017ee jinak k\u0159ehk\u00e9 martenzitick\u00e9 struktu\u0159e dod\u00e1v\u00e1 ur\u010dit\u00fd stupe\u0148 hou\u017eevnatosti.<\/p>\n<h3>Tepeln\u00e9 zpracov\u00e1n\u00ed nerezov\u00e9 oceli 304<\/h3>\n<p>Naproti tomu nerezov\u00e1 ocel 304 je austenitick\u00fd typ, zn\u00e1m\u00fd pro svou pozoruhodnou odolnost proti korozi a ta\u017enost. Tepeln\u00e9 zpracov\u00e1n\u00ed nerezov\u00e9 oceli 304 se v\u00fdrazn\u011b li\u0161\u00ed od nerezov\u00e9 oceli 440 d\u00edky ni\u017e\u0161\u00edmu obsahu uhl\u00edku a vy\u0161\u0161\u00edmu obsahu chromu a niklu. Na rozd\u00edl od 440 nelze 304 vytvrdit tepeln\u00fdm zpracov\u00e1n\u00edm a m\u00edsto toho podl\u00e9h\u00e1 \u017e\u00edh\u00e1n\u00ed. \u017d\u00edh\u00e1n\u00ed zahrnuje zah\u0159\u00e1t\u00ed oceli na teplotu p\u0159ibli\u017en\u011b 1040 \u00b0C, co\u017e umo\u017e\u0148uje p\u0159eskupen\u00ed vnit\u0159n\u00ed struktury oceli do jednotn\u011bj\u0161\u00ed a ta\u017en\u011bj\u0161\u00ed konfigurace, po kter\u00e9 n\u00e1sleduje rychl\u00e9 kalen\u00ed. Tento proces nejen pom\u00e1h\u00e1 p\u0159i uvol\u0148ov\u00e1n\u00ed vnit\u0159n\u00edch pnut\u00ed, ale tak\u00e9 zvy\u0161uje odolnost oceli proti korozi.<\/p>\n<h2 id=\"summary-chart-of-what-is-the-difference-between-304-and-420-stainless-steel\">Souhrnn\u00e1 tabulka rozd\u00edl\u016f mezi nerezovou ocel\u00ed 304 a 440<\/h2>\n<table border=\"1\">\n<tbody>\n<tr>\n<th>Funkce<\/th>\n<th>304 Nerezov\u00e1 ocel<\/th>\n<th>440 Nerezov\u00e1 ocel<\/th>\n<\/tr>\n<tr>\n<td>Prim\u00e1rn\u00ed leguj\u00edc\u00ed prvky<\/td>\n<td>18% chrom, 8% nikl<\/td>\n<td>16-18% chrom, 0% nikl, 0,6-1,2% uhl\u00edk<\/td>\n<\/tr>\n<tr>\n<td>Odolnost proti korozi<\/td>\n<td>Vysok\u00e1<\/td>\n<td>M\u00edrn\u00e1<\/td>\n<\/tr>\n<tr>\n<td>Tvrdost<\/td>\n<td>Doln\u00ed<\/td>\n<td>Vy\u0161\u0161\u00ed<\/td>\n<\/tr>\n<tr>\n<td>Tvarovatelnost<\/td>\n<td>Vysok\u00e1<\/td>\n<td>Doln\u00ed<\/td>\n<\/tr>\n<tr>\n<td>Obrobitelnost<\/td>\n<td>Jednodu\u0161\u0161\u00ed<\/td>\n<td>N\u00e1ro\u010dn\u011bj\u0161\u00ed<\/td>\n<\/tr>\n<tr>\n<td>Aplikace<\/td>\n<td>Kuchy\u0148sk\u00e9 spot\u0159ebi\u010de, automobilov\u00e9 d\u00edly, l\u00e9ka\u0159sk\u00e9 p\u0159\u00edstroje<\/td>\n<td>\u0158ezn\u00e9 n\u00e1stroje, chirurgick\u00e9 n\u00e1stroje, lo\u017eiska<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"conclusion\">Z\u00e1v\u011br<\/h2>\n<p>Z\u00e1v\u011brem, p\u0159i srovn\u00e1n\u00ed nerezov\u00e9 oceli 440 s nerezovou ocel\u00ed 304, kl\u00ed\u010dov\u00e9 rozd\u00edly spo\u010d\u00edvaj\u00ed v jejich chemick\u00e9m slo\u017een\u00ed, tvrdosti, odolnosti proti korozi a pou\u017eit\u00ed. Nerezov\u00e1 ocel 440 s vy\u0161\u0161\u00edm obsahem uhl\u00edku nab\u00edz\u00ed vy\u0161\u0161\u00ed tvrdost a zachov\u00e1n\u00ed ost\u0159\u00ed, tak\u017ee je vhodn\u00e1 pro \u0159ezn\u00e9 n\u00e1stroje a \u010depele. Ve srovn\u00e1n\u00ed s nerezovou ocel\u00ed 304 je v\u0161ak m\u00e9n\u011b odoln\u00e1 v\u016f\u010di korozi. Na druhou stranu nerezov\u00e1 ocel 304, obsahuj\u00edc\u00ed v\u00edce chr\u00f3mu a m\u00e9n\u011b uhl\u00edku, poskytuje vynikaj\u00edc\u00ed odolnost proti korozi a je vhodn\u011bj\u0161\u00ed pro \u0161irokou \u0161k\u00e1lu aplikac\u00ed v drsn\u011bj\u0161\u00edch prost\u0159ed\u00edch, jako je zpracov\u00e1n\u00ed potravin a l\u00e9ka\u0159sk\u00e1 za\u0159\u00edzen\u00ed. Volba mezi nerezovou ocel\u00ed 440 a 304 proto z\u00e1vis\u00ed na konkr\u00e9tn\u00edch po\u017eadavc\u00edch aplikace, vyva\u017euj\u00edc\u00edch faktorech, jako je pevnost, trvanlivost a odolnost proti korozi.<\/p>","protected":false},"excerpt":{"rendered":"<p>Obsah SS420 a SS304: Co je lep\u0161\u00ed? Nev\u00fdhody a v\u00fdhody pou\u017eit\u00ed nerezov\u00e9 oceli 304 vs 440 Aplikace: Kde pou\u017e\u00edt Nerezov\u00e1 ocel 440 vs 304 Odolnost proti korozi: 440 Nerezov\u00e1 ocel vs 304 Rozd\u00edly ve slo\u017een\u00ed mezi 440 a 304 Nerezov\u00e1 ocel Mechanick\u00e9 vlastnosti:40 Tvarov\u00e1n\u00ed a porovn\u00e1v\u00e1n\u00ed oceli:40 Obrobitelnost a porovn\u00e1v\u00e1n\u00ed 34 [\u2026]<\/p>","protected":false},"author":1,"featured_media":3852,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","content-type":"","footnotes":""},"categories":[3],"tags":[],"class_list":["post-4008","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-material-selection-guide"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/machining-quote.com\/cs\/wp-json\/wp\/v2\/posts\/4008","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/machining-quote.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/machining-quote.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/machining-quote.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/machining-quote.com\/cs\/wp-json\/wp\/v2\/comments?post=4008"}],"version-history":[{"count":2,"href":"https:\/\/machining-quote.com\/cs\/wp-json\/wp\/v2\/posts\/4008\/revisions"}],"predecessor-version":[{"id":4011,"href":"https:\/\/machining-quote.com\/cs\/wp-json\/wp\/v2\/posts\/4008\/revisions\/4011"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/machining-quote.com\/cs\/wp-json\/wp\/v2\/media\/3852"}],"wp:attachment":[{"href":"https:\/\/machining-quote.com\/cs\/wp-json\/wp\/v2\/media?parent=4008"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/machining-quote.com\/cs\/wp-json\/wp\/v2\/categories?post=4008"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/machining-quote.com\/cs\/wp-json\/wp\/v2\/tags?post=4008"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}