{"id":2130,"date":"2021-04-09T08:56:42","date_gmt":"2021-04-09T08:56:42","guid":{"rendered":"https:\/\/wldstainless.com\/?p=2130"},"modified":"2021-04-09T08:56:42","modified_gmt":"2021-04-09T08:56:42","slug":"304-stainless-steel-vs-403-stainless-steel","status":"publish","type":"post","link":"https:\/\/wldstainless.com\/cs\/304-stainless-steel-vs-403-stainless-steel\/","title":{"rendered":"Nerezov\u00e1 ocel 304 VS 403 nerezov\u00e1 ocel"},"content":{"rendered":"

T\u0159\u00eddy 304 a 430 jsou b\u011b\u017en\u011b pou\u017e\u00edvan\u00e9 nerezov\u00e9 materi\u00e1ly. Nerezov\u00e1 ocel 304 je obecn\u00fd typ chromniklov\u00e9 austenitick\u00e9 nerezov\u00e9 oceli, hustota 7,93 g\/cm3, zn\u00e1m\u00e1 tak\u00e9 jako nerezov\u00e1 ocel 18\/8, je nerezov\u00e1 ocel \u0159ady 300, nejb\u011b\u017en\u011bji pou\u017e\u00edvan\u00e1 ocel. Odol\u00e1 vysok\u00e9 teplot\u011b 800 \u2103, m\u00e1 dobr\u00fd zpracovatelsk\u00fd v\u00fdkon a hou\u017eevnatost, \u0161iroce pou\u017e\u00edvan\u00fd v po\u017eadavc\u00edch na dobr\u00fd komplexn\u00ed v\u00fdkon (odolnost proti korozi a lisov\u00e1n\u00ed) za\u0159\u00edzen\u00ed a d\u00edl\u016f. 304L je n\u00edzkouhl\u00edkov\u00e1 verze 304, kter\u00e1 nevy\u017eaduje \u017e\u00edh\u00e1n\u00ed po sva\u0159ov\u00e1n\u00ed, tak\u017ee je \u0161iroce pou\u017e\u00edv\u00e1na pro tlust\u00e9 d\u00edly (cca 5 mm a v\u00edce). Vy\u0161\u0161\u00ed obsah uhl\u00edku 304H lze pou\u017e\u00edt p\u0159i vysok\u00fdch teplot\u00e1ch. Struktura \u017e\u00edhan\u00e9ho austenitu tak\u00e9 d\u00e1v\u00e1 t\u011bmto t\u0159\u00edd\u00e1m vynikaj\u00edc\u00ed hou\u017eevnatost, a to i p\u0159i n\u00edzk\u00fdch teplot\u00e1ch pod bodem mrazu.<\/p>\n

N\u00edzkouhl\u00edkov\u00fd vysok\u00fd chrom 430 je jednou z nejb\u011b\u017en\u011bj\u0161\u00edch feritick\u00fdch nerezov\u00fdch ocel\u00ed, m\u00e1 dobrou odolnost proti korozi, tak\u00e9 zn\u00e1m\u00fd jako 18\/0 nebo 18-0, je jednou z nerezov\u00fdch ocel\u00ed \u0159ady 400. M\u016f\u017ee b\u00fdt vyroben m\u00edrn\u011b zpevn\u011bn\u00fd tv\u00e1\u0159en\u00edm za studena, ale hou\u017eevnatost p\u0159i n\u00edzk\u00fdch teplot\u00e1ch je \u0161patn\u00e1 a obecn\u011b nem\u016f\u017ee b\u00fdt vytvrzena tepeln\u00fdm zpracov\u00e1n\u00edm. Jeho tepeln\u00e1 vodivost je lep\u0161\u00ed ne\u017e austenit, koeficient tepeln\u00e9 rozta\u017enosti je men\u0161\u00ed ne\u017e austenit, tepeln\u00e1 odolnost proti \u00fanav\u011b, p\u0159id\u00e1n\u00ed stabiliza\u010dn\u00edho prvku titanu \u010din\u00ed sva\u0159ovac\u00ed \u0161ev sou\u010d\u00e1st\u00ed mechanick\u00fdch vlastnost\u00ed je dobr\u00fd, lze jej pou\u017e\u00edt k dekoraci budov, \u010d\u00e1sti ho\u0159\u00e1ku paliva , dom\u00e1c\u00ed spot\u0159ebi\u010de, d\u00edly dom\u00e1c\u00edch spot\u0159ebi\u010d\u016f. 430F je druh oceli s voln\u00fdm \u0159ezn\u00fdm v\u00fdkonem na oceli 430, pou\u017e\u00edv\u00e1 se hlavn\u011b pro automatick\u00e9 soustruhy, \u0161rouby a matice atd. 430LX p\u0159id\u00e1v\u00e1 Ti nebo Nb do oceli 430, sni\u017euje obsah C a zlep\u0161uje v\u00fdkon zpracov\u00e1n\u00ed a v\u00fdkon sva\u0159ov\u00e1n\u00ed. Pou\u017e\u00edv\u00e1 se p\u0159edev\u0161\u00edm pro z\u00e1sobn\u00edky tepl\u00e9 vody, syst\u00e9my otopn\u00e9 vody, sanit\u00e1rn\u00ed spot\u0159ebi\u010de, dom\u00e1c\u00ed spot\u0159ebi\u010de, setrva\u010dn\u00edky j\u00edzdn\u00edch kol atd.<\/p>\n

 <\/p>\n

Podle ASTM A240- Specifikace pro chromov\u00e9 a chromniklov\u00e9 nerezov\u00e9 desky, plechy a p\u00e1sy pro tlakov\u00e9 n\u00e1doby a v\u0161eobecn\u00e9 \u00fa\u010dely mus\u00ed nerezov\u00e1 ocel 430 obsahovat m\u00e9n\u011b ne\u017e 0,12% uhl\u00edku, mezi 16-18% chr\u00f3mu a m\u00e9n\u011b ne\u017e 0,75% niklu, rozd\u00edl mezi 304 a 430, jak je uvedeno v tabulce n\u00ed\u017ee:<\/p>\n

Srovn\u00e1n\u00ed chemick\u00e9ho slo\u017een\u00ed\u00a0<\/strong><\/p>\n\n\n\n\n\n
UNS<\/td>\nC<\/td>\nMn<\/td>\nP<\/td>\nS<\/td>\nSi<\/td>\nCr<\/td>\nNi<\/td>\nMo<\/td>\n<\/tr>\n
S30400<\/td>\n0.07<\/td>\n2.00<\/td>\n0.045<\/td>\n0.03<\/td>\n0.75<\/td>\n17.5-19.5<\/td>\n8.0-10.5<\/td>\n\/<\/td>\n<\/tr>\n
S43000<\/td>\n0.12<\/td>\n1,00<\/td>\n0.04<\/td>\n0.03<\/td>\n1.00<\/td>\n16.0-18.0<\/td>\n0.75<\/td>\n\/<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

Porovn\u00e1n\u00ed mechanick\u00fdch vlastnost\u00ed<\/strong><\/p>\n\n\n\n\n\n
Zn\u00e1mky<\/td>\nMez kluzu, Mpa<\/td>\nPevnost v tahu, Mpa<\/td>\nProdlou\u017een\u00ed ve 2\/50 mm, min, %<\/td>\nTvrdost, HBW<\/td>\n<\/tr>\n
304<\/td>\n205<\/td>\n515<\/td>\n40<\/td>\n183<\/td>\n<\/tr>\n
403<\/td>\n205<\/td>\n450<\/td>\n22<\/td>\n201<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

Suma sum\u00e1rum, li\u0161\u00ed se hlavn\u011b v n\u00e1sleduj\u00edc\u00edch polo\u017ek\u00e1ch:<\/p>\n

    \n
  • Odolnost proti korozi<\/strong>: Odolnost korozivzdorn\u00e9 oceli 304 je lep\u0161\u00ed ne\u017e 430. Proto\u017ee nerezov\u00e1 ocel 430 obsahuje 16,00-18,00% chrom, v z\u00e1sad\u011b neobsahuje nikl, nerezov\u00e1 ocel 304 obsahuje v\u00edce chr\u00f3mu a niklu;<\/li>\n
  • Stabilita<\/strong>: Nerezov\u00e1 ocel 430 je feritov\u00e1, nerezov\u00e1 ocel 304 je austenit, stabiln\u011bj\u0161\u00ed ne\u017e nerezov\u00e1 ocel 430;<\/li>\n
  • Hou\u017eevnatost<\/strong>: Hou\u017eevnatost 304 je vy\u0161\u0161\u00ed ne\u017e u nerezov\u00e9 oceli 430;<\/li>\n
  • Tepeln\u00e1 vodivost<\/strong>: Tepeln\u00e1 vodivost feritov\u00e9 nerezov\u00e9 oceli 430 je jako nerezov\u00e1 ocel 304;<\/li>\n
  • Mechanick\u00e9 vlastnosti<\/strong>: Nerezov\u00e1 ocel 430 mechanick\u00e9 vlastnosti svaru ne\u017e nerezov\u00e1 ocel 304 je lep\u0161\u00ed d\u00edky p\u0159id\u00e1n\u00ed stabiln\u00edho chemick\u00e9ho prvku titan.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

    T\u0159\u00eddy 304 a 430 jsou b\u011b\u017en\u011b pou\u017e\u00edvan\u00e9 nerezov\u00e9 materi\u00e1ly. Nerezov\u00e1 ocel 304 je obecn\u00fd typ chromniklov\u00e9 austenitick\u00e9 nerezov\u00e9 oceli, hustota 7,93 g\/cm3, zn\u00e1m\u00e1 tak\u00e9 jako nerezov\u00e1 ocel 18\/8, je nerezov\u00e1 ocel \u0159ady 300, nejb\u011b\u017en\u011bji pou\u017e\u00edvan\u00e1 ocel. Odol\u00e1 vysok\u00e9 teplot\u011b 800 \u2103, m\u00e1 dobr\u00fd zpracovatelsk\u00fd v\u00fdkon [\u2026]<\/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-2130","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/posts\/2130","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/comments?post=2130"}],"version-history":[{"count":1,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/posts\/2130\/revisions"}],"predecessor-version":[{"id":2131,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/posts\/2130\/revisions\/2131"}],"wp:attachment":[{"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/media?parent=2130"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/categories?post=2130"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/tags?post=2130"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}