{"id":2121,"date":"2021-03-31T08:52:53","date_gmt":"2021-03-31T08:52:53","guid":{"rendered":"https:\/\/wldstainless.com\/?p=2121"},"modified":"2021-03-31T09:06:23","modified_gmt":"2021-03-31T09:06:23","slug":"302hq-vs-304-stainless-steel","status":"publish","type":"post","link":"https:\/\/wldstainless.com\/cs\/302hq-vs-304-stainless-steel\/","title":{"rendered":"302HQ VS 304 Nerezov\u00e1 ocel"},"content":{"rendered":"

Nerezov\u00e1 ocel 302HQ je standardn\u00ed materi\u00e1l speci\u00e1ln\u011b pou\u017e\u00edvan\u00fd p\u0159i v\u00fdrob\u011b samo\u0159ezn\u00fdch \u0161roub\u016f a lehk\u00fdch mechanick\u00fdch \u0161roub\u016f. Pou\u017e\u00edv\u00e1 se tak\u00e9 ve \u0161roubech, stav\u011bc\u00edch \u0161roubech, n\u00fdtech a speci\u00e1ln\u00edch spojovac\u00edch materi\u00e1lech. N\u00e1zev 302HQ nen\u00ed standardizov\u00e1n. ASTM jej uv\u00e1d\u00ed jako UNS S30430, kter\u00fd tak\u00e9 zahrnuje \u201eXM-7\u201c, \u201e304CU\u201c a \u201e304HQ\u201c. Nyn\u00ed zcela nahradila ocel 384 a 305 pro \u00fa\u010dely ra\u017een\u00ed za studena. ISO 3506, Standardn\u00ed specifikace pro spojovac\u00ed prvky z nerezov\u00e9 oceli, 302HQ jako zp\u016fsobil\u00e1 sou\u010d\u00e1st pro spojovac\u00ed prvky t\u0159\u00eddy \u201eA2\u201c; B\u011b\u017en\u011b se pou\u017e\u00edv\u00e1 k v\u00fdrob\u011b spojovac\u00edch prvk\u016f v s\u00edle A2-70 a A2-80. Stabiln\u00ed austenitick\u00e1 struktura umo\u017e\u0148uje, aby 302HQ byl nemagnetick\u00fd i po rozs\u00e1hl\u00e9m zpracov\u00e1n\u00ed za studena a aby si zachoval vynikaj\u00edc\u00ed hou\u017eevnatost p\u0159i teplot\u00e1ch a\u017e mrazu. Ve srovn\u00e1n\u00ed s nerezovou ocel\u00ed 304 m\u016f\u017ee p\u0159id\u00e1n\u00ed m\u011bdi 3% do 302HQ v\u00fdrazn\u011b sn\u00ed\u017eit rychlost kalen\u00ed za studena. Chemick\u00e9 slo\u017een\u00ed a fyzik\u00e1ln\u00ed vlastnosti jsou uvedeny n\u00ed\u017ee:<\/p>\n

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Ekvivalentn\u00ed materi\u00e1l<\/strong><\/p>\n\n\n\n\n
Zn\u00e1mky<\/td>\nUNS \u010d<\/td>\nR\u00c1MUS<\/td>\nEN<\/td>\nJIS<\/td>\n<\/tr>\n
302HQ<\/td>\nS30430<\/td>\n1.4567<\/td>\nX3CrNiCu18-9-4<\/td>\nSUSXM7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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Chemick\u00e9 slo\u017een\u00ed (ASTM A493 S30430)<\/strong><\/p>\n\n\n\n\n
Zn\u00e1mky<\/td>\nC<\/td>\nMn<\/td>\nSi<\/td>\nP<\/td>\nS<\/td>\nCr<\/td>\nMo<\/td>\nNi<\/td>\nCu<\/td>\n<\/tr>\n
302HQ<\/td>\n0.03<\/td>\n2.00<\/td>\n1.00<\/td>\n0.045<\/td>\n0.03<\/td>\n17.0-19.0<\/td>\n\/<\/td>\n8.0-10.0<\/td>\n3.0-4.0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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Mechanick\u00e1 vlastnost<\/strong><\/p>\n

Pevnost v tahu 302HQ: \u017d\u00edh\u00e1n\u00ed: 605, M\u00edrn\u00e9 ta\u017een\u00ed: 660<\/p>\n

Hustota: 7900 kg\/\u33a1<\/p>\n

Modul pru\u017enosti: 193 Gpa<\/p>\n

Pr\u016fm\u011brn\u00fd koeficient tepeln\u00e9 rozta\u017enosti: 0-100\u2103 (um\/m\/\u2103) 17,2; 0-315\u2103 (um\/m\/\u2103); 0-538 \u2103 (18,8)<\/p>\n

Tepeln\u00e1 vodivost: 100\u2103 (W\/ M. K) 16,3; 500\u2103 (W\/M.K) 21.5<\/p>\n

M\u011brn\u00e9 teplo: 0-100\u2103 (J\/ kg.K) 500;<\/p>\n

Odpor: 720<\/p>\n

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Odolnost proti korozi<\/strong><\/p>\n

Jeho odolnost proti korozi je ekvivalentn\u00ed nebo lep\u0161\u00ed ne\u017e nerezov\u00e1 ocel 304. V tepl\u00e9m chloridov\u00e9m prost\u0159ed\u00ed snadno doch\u00e1z\u00ed k d\u016flkov\u00e9 a \u0161t\u011brbinov\u00e9 korozi a korozn\u00ed prask\u00e1n\u00ed pod nap\u011bt\u00edm je citliv\u00e9, kdy\u017e je teplota vy\u0161\u0161\u00ed ne\u017e asi 50 \u00b0C. 302HQ vydr\u017e\u00ed asi 200 mg\/l chloridu v pitn\u00e9 vod\u011b p\u0159i pokojov\u00e9 teplot\u011b a 150 mg\/l p\u0159i 60\u2103.<\/p>\n

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Tepeln\u011b odoln\u00fd v\u00fdkon<\/strong><\/p>\n

Dobr\u00e1 odolnost proti oxidaci, teplota p\u0159eru\u0161ovan\u00e9ho pou\u017eit\u00ed a\u017e 870 \u00b0C, teplota nep\u0159etr\u017eit\u00e9ho pou\u017eit\u00ed a\u017e 925 \u00b0C. Vzhledem k n\u00edzk\u00e9mu obsahu uhl\u00edku 302HQ je bezpe\u010dn\u00fd pro nep\u0159etr\u017eit\u00e9 pou\u017eit\u00ed (bez precipitace karbid\u016f) v rozsahu od 425 do 860 \u00b0C.<\/p>\n

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Tepeln\u00e9 zpracov\u00e1n\u00ed<\/strong><\/p>\n

Roztokov\u00e1 \u00faprava (\u017e\u00edh\u00e1n\u00ed) se zah\u0159eje na 1010-1120\u00b0C a rychle se ochlad\u00ed. Tepeln\u00fdm zpracov\u00e1n\u00edm neztvrdne.<\/p>\n

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Sva\u0159itelnost<\/strong><\/p>\n

V\u00fdborn\u00e1 sva\u0159itelnost, lze pou\u017e\u00edt v\u0161echny standardn\u00ed metody tavn\u00e9ho sva\u0159ov\u00e1n\u00ed (bez ohledu na to, zda obsahuj\u00ed p\u0159\u00eddavn\u00fd kov nebo ne). Pou\u017eijte elektrodu 308L. Sva\u0159ov\u00e1n\u00ed se obecn\u011b nevy\u017eaduje s v\u00fdjimkou v\u00fdroby spojovac\u00edch prvk\u016f se svorn\u00edky, kde se ke spojen\u00ed dr\u00e1t\u016f pou\u017e\u00edv\u00e1 odporov\u00e9 sva\u0159ov\u00e1n\u00ed na tupo.<\/p>\n

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zpracov\u00e1v\u00e1 se\u00a0<\/strong><\/p>\n

302HQ je z\u0159\u00eddka obr\u00e1b\u011bn. T\u0159\u00edda m\u00e1 velmi n\u00edzk\u00fd obsah s\u00edry, co\u017e napom\u00e1h\u00e1 jej\u00ed tva\u0159itelnosti, ale sni\u017euje jej\u00ed obrobitelnost. Vylep\u0161en\u00fd 302HQ (UGIMA 4567) m\u00e1 velmi vysokou obrobitelnost, m\u00edrn\u011b vy\u0161\u0161\u00ed obsah s\u00edry a je tak\u00e9 upraven v\u00e1pn\u00edkem pro pou\u017eit\u00ed vy\u017eaduj\u00edc\u00ed rozs\u00e1hl\u00e9 operace tv\u00e1\u0159en\u00ed za studena a obr\u00e1b\u011bn\u00ed na 18\/8 ocel<\/a>.<\/p>\n

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Kalen\u00ed za studena<\/strong><\/p>\n

302HQ je nejni\u017e\u0161\u00ed rychlost mechanick\u00e9ho kalen\u00ed mezi b\u011b\u017en\u00fdmi t\u0159\u00eddami austenitick\u00fdch nerezov\u00fdch ocel\u00ed. Podle \u00fadaj\u016f ta\u017een\u00ed dr\u00e1tu se pevnost v tahu zv\u00fd\u0161\u00ed o 8 MPa, kdy\u017e se plocha pro zpracov\u00e1n\u00ed za studena sn\u00ed\u017e\u00ed o 1%). I po rozs\u00e1hl\u00e9 pr\u00e1ci za studena zna\u010dka v podstat\u011b nereaguje na magnety. N\u011bkter\u00e9 spoje s vysokou pevnost\u00ed za studena vy\u017eaduj\u00ed m\u00edrn\u011b vy\u0161\u0161\u00ed rychlost mechanick\u00e9ho zpevn\u011bn\u00ed, tak\u017ee 304<\/a> nebo 304L (nebo speci\u00e1ln\u00ed jakost 304M) m\u00edsto 302HQ; Rychlost mechanick\u00e9ho zpevn\u011bn\u00ed t\u011bchto jakost\u00ed je asi 10-12,5 MPa.<\/p>\n

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typick\u00e9 aplikace<\/strong><\/p>\n

V\u0161echny drsn\u00e9 aplikace za studena, v\u010detn\u011b samo\u0159ezn\u00fdch \u0161roub\u016f, st\u0159e\u0161n\u00edch \u0161roub\u016f, mechanick\u00fdch \u0161roub\u016f, \u0161roub\u016f, stav\u011bc\u00edch \u0161roub\u016f, slep\u00fdch n\u00fdt\u016f atd.<\/p>","protected":false},"excerpt":{"rendered":"

Nerezov\u00e1 ocel 302HQ je standardn\u00ed materi\u00e1l speci\u00e1ln\u011b pou\u017e\u00edvan\u00fd p\u0159i v\u00fdrob\u011b samo\u0159ezn\u00fdch \u0161roub\u016f a lehk\u00fdch mechanick\u00fdch \u0161roub\u016f. Pou\u017e\u00edv\u00e1 se tak\u00e9 ve \u0161roubech, stav\u011bc\u00edch \u0161roubech, n\u00fdtech a speci\u00e1ln\u00edch spojovac\u00edch materi\u00e1lech. N\u00e1zev 302HQ nen\u00ed standardizov\u00e1n. ASTM jej uv\u00e1d\u00ed jako UNS S30430, kter\u00fd tak\u00e9 zahrnuje \u201eXM-7\u201c, \u201e304CU\u201c a \u201e304HQ\u201c. Nyn\u00ed m\u00e1 zcela [\u2026]<\/p>","protected":false},"author":1,"featured_media":2123,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2121","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/posts\/2121","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=2121"}],"version-history":[{"count":3,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/posts\/2121\/revisions"}],"predecessor-version":[{"id":2125,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/posts\/2121\/revisions\/2125"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/media\/2123"}],"wp:attachment":[{"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/media?parent=2121"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/categories?post=2121"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/tags?post=2121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}