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.block-content-new-icon{height:7px;left:52px;position:absolute;top:3px}網(wǎng)頁(yè)新聞貼吧知道網(wǎng)盤(pán)圖片視頻地圖文庫(kù)資訊采購(gòu)百科百度首頁(yè)登錄注冊(cè)進(jìn)入詞條全站搜索幫助首頁(yè)秒懂百科特色百科知識(shí)專(zhuān)題加入百科百科團(tuán)隊(duì)權(quán)威合作個(gè)人中心播報(bào)討論上傳視頻鋼筋屈服點(diǎn)為235N/MM2收藏查看我的收藏0有用+10同義詞Q235A（Q235A）一般指是一種碳素結(jié)構(gòu)鋼，屬于Q235系列中的A級(jí)材料，其屈服強(qiáng)度為235N/mm2。該系列按質(zhì)量等級(jí)分為A、B、C、D、E五種，其中A級(jí)適應(yīng)耐氣候溫度為+40℃，主要應(yīng)用于普通建筑結(jié)構(gòu)及機(jī)械部件。不同等級(jí)的核心差異在于沖擊試驗(yàn)溫度要求：A級(jí)不進(jìn)行沖擊測(cè)試，B級(jí)需滿(mǎn)足20℃沖擊功，C級(jí)為0℃，D級(jí)為-20℃。的化學(xué)成分包括碳含量0.14%-0.22%、錳0.30%-0.65%，硫、磷含量較高（均≤0.050%）。其機(jī)械性能抗拉強(qiáng)度范圍為375-500MPa，伸長(zhǎng)率隨材料厚度增加逐步降低。該材料通常采用沸騰鋼工藝生產(chǎn)，但鎮(zhèn)靜鋼因性能更穩(wěn)定而被推薦用于焊接結(jié)構(gòu)或低溫環(huán)境。實(shí)際應(yīng)用中，可用于制造模具把手等非核心零件，經(jīng)950℃鹽浴淬火后硬度可達(dá)36-40HRC。中文名Q235A性 質(zhì)鋼筋屈服點(diǎn)為235N/MM2等 級(jí)Q235A，Q235B，Q235C，Q235D淬火規(guī)范淬火溫度為950℃，鹽浴爐加熱目錄1簡(jiǎn)介2等級(jí)區(qū)別3機(jī)械性能4化學(xué)成分5淬火規(guī)范6運(yùn)用舉例簡(jiǎn)介播報(bào)編輯Q235分別有A、B、C、D、E五個(gè)等級(jí)，A是零上40度，B是零上20度，C是零度以上，D是零下20度，E是零下40度，在偏冷地區(qū)對(duì)此性能有所要求。等級(jí)區(qū)別播報(bào)編輯Q235A，Q235B，Q235C，Q235D這是等級(jí)的區(qū)分，所代表的，主要是沖擊的溫度有所不同而已。A、B、C、D所不同的，指的是它們性能中沖擊溫度的不同。分別為： Q235A級(jí)，是不做沖擊；Q235B級(jí)，是20度常溫沖擊； Q235C級(jí)，是0度沖擊； Q235D級(jí)，是‐20度沖擊。 在不同的沖擊溫度，沖擊的數(shù)值也有所不同。在力學(xué)性能上，A級(jí)只保證常規(guī)的抗拉強(qiáng)度、屈服強(qiáng)度和伸長(zhǎng)率；B級(jí)開(kāi)始增加180℃冷彎和室溫沖擊功，C級(jí)保證0℃沖擊功，D級(jí)保證-20℃沖擊功，最低值都是27J。但一般市面上不易采購(gòu)到C級(jí)，D級(jí)就更不可能。多是用B級(jí)通過(guò)成分和性能復(fù)驗(yàn)達(dá)到C級(jí)要求后來(lái)代替。元素含量：A、B、C、D硫含量依次遞減；A和B的磷含量相同，C的磷含量次之，D磷含量最少 Q235 Q235分A、B、C、D四級(jí)(GB700‐88)Q235A級(jí)含 C0.14~0.22% Mn0.30~0.65 Si≤0.30 S≤0.050 P≤0.045Q235B級(jí)含 C0.12~0.20% Mn0.30~0.670 Si≤0.30 S≤0.045 P≤0.045Q235C級(jí)含 C≤0.18% Mn0.35~0.80 Si≤0.30 S≤0.040 P≤0.040Q235D級(jí)含 C≤0.17% Mn0.35~0.80 Si≤0.35 S≤0.040 P≤0.035就其脫氧方法而言，可以采用F,b,z分別表示為沸騰鋼、平鎮(zhèn)靜鋼、鎮(zhèn)靜鋼。沸騰鋼是脫氧不完全的鋼，塑性和韌性較差。用這種材料制成的焊接結(jié)構(gòu)，受動(dòng)力載荷作用時(shí)接頭容易出現(xiàn)裂縫。不宜在低溫下工作，有時(shí)會(huì)產(chǎn)生硬化現(xiàn)象。相比之下，鎮(zhèn)靜鋼質(zhì)優(yōu)而勻，塑性和韌性都好。機(jī)械性能播報(bào)編輯Q235的機(jī)械性能：抗拉強(qiáng)度（σb/MPa）：375-500伸長(zhǎng)率（δ5/%）：≥26（a≤16mm）≥25（a>16-40mm）≥24（a>40-60mm）≥23（a>60-100mm）≥22（a>100-150mm）≥21（a>150mm）其中 a 為鋼材厚度或直徑。化學(xué)成分播報(bào)編輯C 0.14~0.22%Mn 0.30~0.65Si ≤0.30S ≤0.050P ≤0.045淬火規(guī)范播報(bào)編輯淬火溫度為950℃，鹽浴爐加熱，10%NaCl鹽水冷卻淬火。運(yùn)用舉例播報(bào)編輯可用于各種磨具把手以及其他不重要的磨具零件。采用Q235鋼做沖頭材料，經(jīng)淬火后不回火直接使用，硬度為36~40HRC，解決了沖頭在使用中碎裂的現(xiàn)象。新手上路成長(zhǎng)任務(wù)編輯入門(mén)編輯規(guī)則本人編輯我有疑問(wèn)內(nèi)容質(zhì)疑在線(xiàn)客服官方貼吧意見(jiàn)反饋投訴建議舉報(bào)不良信息未通過(guò)詞條申訴投訴侵權(quán)信息封禁查詢(xún)與解封?2025?Baidu?使用百度前必讀?|?百科協(xié)議?|?隱私政策?|?百度百科合作平臺(tái)?|?京ICP證030173號(hào)?京公網(wǎng)安備11000002000001號(hào)window.PAGE_DATA= 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概述特性及適用范圍： 表示方法：①由Q+數(shù)字+質(zhì)量等級(jí)符號(hào)+脫氧方法符號(hào)組成。它的鋼號(hào)冠以“Q”，代表鋼材的屈服點(diǎn)，后面的數(shù)字表示屈服點(diǎn)數(shù)值，單位是MPa，例如Q235表示屈服點(diǎn)（σs）為235MPa的碳素結(jié)構(gòu)鋼。②必要時(shí)鋼號(hào)后面可標(biāo)出表示質(zhì)量等級(jí)和脫氧方法的符號(hào)。質(zhì)量等級(jí)符號(hào)分別為A、B、C、D。A指不做沖擊，B在20度以上，C在0度以上，D在-20度以上，A到D所不同的，指的是它們性能中沖擊溫度的不同。分別為：Q235A級(jí)，是不作沖擊韌性試驗(yàn)要求；Q235B級(jí)，是作常溫（20℃）沖擊韌性試驗(yàn)；Q235C級(jí)，是作0℃沖擊韌性試驗(yàn)；Q235D級(jí)，是作-20℃沖擊韌性試驗(yàn)。脫氧方法符號(hào)：F表示沸騰鋼；b表示半鎮(zhèn)靜鋼：Z表示鎮(zhèn)靜鋼；TZ表示特殊鎮(zhèn)靜鋼，鎮(zhèn)靜鋼可不標(biāo)符號(hào)，即Z和TZ都可不標(biāo)。例如Q235-AF表示A級(jí)沸騰鋼。③專(zhuān)門(mén)用途的碳素鋼，例如橋用鋼。④Q代表鋼的屈服強(qiáng)度，其后數(shù)字表示屈服強(qiáng)度值（MPa），必要時(shí)數(shù)字后標(biāo)出質(zhì)量等級(jí)（A、B、C、D、E）和脫氧方法（F、b、Z）。物理性能化學(xué)成份碳 C ：≤0.22%硅 Si：≤0.35%錳 Mn：≤1.4%硫 S ：≤0.050%磷 P ：≤0.045%鉻 Cr：允許殘余含量≤0.30%鎳 Ni：允許殘余含量≤0.30%銅 Cu：允許殘余含量≤0.30%注：脫氧方法:F、Z力學(xué)性能抗拉強(qiáng)度 σb (MPa)：370～500屈服強(qiáng)度 σs (MPa)：≤16時(shí):≥235; >16～40時(shí):≥225; >40～60時(shí): ≥215; >60～100 時(shí): ≥215; > 100～150 時(shí): ≥195; >150時(shí): ≥185伸長(zhǎng)率 δ5 (%)：≤40時(shí):≥26;>40～60時(shí):≥25;>60～100時(shí):≥24;>100～150時(shí):≥22;>150～200時(shí):≥21;冷彎（彎180°）：【縱向】鋼厚度≤16時(shí)，彎心直徑d=a；鋼厚度>16～100時(shí)，彎心直徑 d=2a；【橫向】鋼厚度≤16時(shí)，彎心直徑d=1.5a；鋼厚度>16～100時(shí)，彎心直徑d=2.5a；熱處理規(guī)范及金相組織熱處理規(guī)范：熱軋。金相組織：鐵素體+珠光體。交貨狀態(tài):一般以熱軋（包括控軋）狀態(tài)交貨。根據(jù)需方要求，經(jīng)雙方協(xié)議，也可以正火處理狀態(tài)交貨。區(qū)別Q235A和Q235B的區(qū)別：鋼材皆屬于碳素鋼。在國(guó)家標(biāo)準(zhǔn)GB/T 700—2006中，對(duì)Q235A和Q235B的材質(zhì)區(qū)分主要在鋼材的含碳量方面，材質(zhì)是Q235A的材質(zhì)含碳量通常在0.14—0.22﹪之間；Q235A的材質(zhì)不做沖擊實(shí)驗(yàn)，而Q235B是做常溫沖擊實(shí)驗(yàn)，V型缺口。在與客戶(hù)協(xié)商的情況下，Q235B的含碳量也可以按≤0.22%生產(chǎn)出貨。相對(duì)來(lái)說(shuō)，材質(zhì)是Q235B的鋼材的機(jī)械性能要遠(yuǎn)遠(yuǎn)優(yōu)于材質(zhì)是Q235A的鋼材。一般情況下，鋼廠(chǎng)在成品型材出廠(chǎng)之前都在標(biāo)識(shí)牌上做了標(biāo)識(shí)。用戶(hù)可以在標(biāo)識(shí)牌上判別其材質(zhì)是Q235A，還是Q235B，或其他材質(zhì)。設(shè)計(jì)壓力P≤1.6MPa；使用溫度為0～350℃；鋼板厚度>=20mm。
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