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百度百科-驗證 if (!window['__abbaidu_2020_subidgetf']) { window['__abbaidu_2020_subidgetf'] = function () { var subid = 01000000; return subid; }; } !function(){ var $ = require('wiki-common:widget/lib/jquery/jquery'); var Dialog = require('wiki-common:widget/ui/dialog/dialog'); var ClickstreamSdk = require('wiki-common:widget/util/clickstreamSdk'); var clickstream = new ClickstreamSdk.default({ appname: 'baike', platform: 'web', device: 'pc', page: 'spam', auto: true }); var sourceUrl = "\/item\/NAS304L"; var fromPage = "pc_lemma_page_risk_score"; var logParam = { page: 'spam', fromPage: fromPage } clickstream.logActEvent($.extend({}, logParam, {'act_type': 'show'})); function init() { if (window.sdkMachine) { var machineSDK = new window.sdkMachine({ container: document.body, title: '訪問異常，請進行驗證', ak: 'GHm64ouBF7GGAhXNcsae9xiVByAGWhMI', deviceType: 'pc', type: 'spin', testUrl: '', initApiSuccessFn: function() { machineSDK.init(); }, errorFn: function(err) { alert('errfn___' + err.message || '') }, verifySuccessFn: function(result) { $.ajax({ type: 'GET', url: '/api/anticrawl/captchaverify', dataType: 'json', data: { ds: result.ds, passTk: result.tk, clientType: 'pc', tk: "d4b87f38b35a5e84f28e8674b41132db", sourceFrom: fromPage }, success: function(res) { if (res && res.errno === 0 && !res.isSpam) { clickstream.logActEvent($.extend({}, logParam, {'act_type': 'verify-pass'})); if (sourceUrl) { machineSDK.close(); window.location.href = sourceUrl; } } else { var submitInform = Dialog.inform({ icon: 'WARNING', mainMsg: '驗證失敗，請重新驗證' }); submitInform.show(); setTimeout(function() { submitInform.hide(); }, 3000); machineSDK.close(); init(); } } }); }, verifyFailFn: function() { }, feedbackEvent: function(feedback) { return true; }, }); } }; init(); }(); !function(){ require('wiki-common:widget/component/psLink/psLink'); var clickstream = require('wiki-common:packages/utils/logger'); clickstream.logViewPage({ page: 'all-pc' }); var tmpBaiduId = ''; require(['wiki-common:widget/util/setBaikeTmpBaiduId.es'], function (setBaikeTmpBaiduId, cookie) { setBaikeTmpBaiduId(tmpBaiduId); }); }(); NAS 304LNAS 304L不銹鋼也稱為超低碳不銹鋼，是一種通用性的不銹鋼材料，廣泛地用于制作要求良好綜合性能（耐腐蝕和成型性）的設備和機件。NAS 304L是碳含量較低的304不銹鋼的變種，用于需要焊接的場合。較低的碳含量使得在靠近焊縫的熱影響區(qū)中所析出的碳化物減至最少，而碳化物的析出可能導致不銹鋼在某些環(huán)境中產生晶間腐蝕（焊接侵蝕）。 PRODUCT PARAMETERS 產品參數(shù) 化學成分成分CSiMnPSNiCr最小值-----818最大值0.03120.0450.031220力學性能屈服強度（N/mm2）≥205抗拉強度 ≥520延伸率（%）≥40硬度HB ≤187 HRB≤90 HV ≤200不銹鋼棒密度7.93 g·cm-3比熱c(20℃)0.502 J·(g·C)-1熱導率λ/W(m·℃)-1 (在下列溫度/℃)20 100 50012.1 16.3 21.4線脹系數(shù)α/(10-6/℃) (在下列溫度間/℃)20～100 20～200 20～300 20～40016.0 16.8 17.5 18.1電阻率0.73 Ω·mm2·m-1熔點 1398～1420℃ 上一頁：NAS 304DJ