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Q345A特種鋼板-碳素鋼/模具鋼系列
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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)人中心收藏查看我的收藏0有用+10Q345A播報(bào)討論上傳視頻鋼材Q345A（鋼材）Q345A是一種低合金高強(qiáng)度結(jié)構(gòu)鋼，執(zhí)行國(guó)家標(biāo)準(zhǔn)GB/T1591-2008，名稱(chēng)中“Q”指屈服強(qiáng)度，“345”代表屈服值不低于345MPa（隨厚度增加而降低）。主要應(yīng)用于橋梁、車(chē)輛、建筑、壓力容器等常溫（0℃以上）環(huán)境的結(jié)構(gòu)件 [1-2]。相較于同系列Q345B/C/D/E等級(jí)，Q345A的磷、硫含量較高且不做低溫沖擊試驗(yàn)，導(dǎo)致其低溫韌性較弱但市場(chǎng)價(jià)格較低。其化學(xué)成分中錳元素上限為1.70%（取消最小值限制），并添加微量釩以?xún)?yōu)化性能 [4]。機(jī)械性能要求為：厚度≤16mm時(shí)抗拉強(qiáng)度470-630MPa，屈服強(qiáng)度≥345MPa，伸長(zhǎng)率≥21% [5]。檢測(cè)需驗(yàn)證化學(xué)成分達(dá)標(biāo)，并通過(guò)專(zhuān)業(yè)機(jī)構(gòu)測(cè)試屈服強(qiáng)度與拉伸性能。該鋼材碳當(dāng)量為0.49%，焊接時(shí)需采用低氫焊材及預(yù)熱工藝以避免冷裂紋 [3] [5]。市場(chǎng)流通形態(tài)包括板材、無(wú)縫管、矩形鋼管等，現(xiàn)貨價(jià)格約3700-3900元/噸 [2]。中文名Q345A類(lèi) 型鋼材缺 點(diǎn)性能差優(yōu) 點(diǎn)強(qiáng)度好目錄1基本信息2規(guī)格尺寸3化學(xué)成分4定義基本信息播報(bào)編輯Q345A鋼材與Q345B，C，D，E鋼相比而言，低溫沖沖擊的試驗(yàn)溫度高，性能差，含有害物質(zhì)P,S量比Q345B,C,D,E要高。市場(chǎng)價(jià)格比Q345B,C,D,E要低Q345 是一種鋼材的材質(zhì)。它是低合金鋼，廣泛應(yīng)用于橋梁、車(chē)輛、船舶、建筑、壓力容器等。Q代表的是這種材質(zhì)的屈服，后面的345，就是指這種材質(zhì)的屈服值，在345MPa左右。并會(huì)隨著材質(zhì)的厚度的增加而使其屈服值減小。參考標(biāo)準(zhǔn)：GB/T1591-2008 《低合金高強(qiáng)度結(jié)構(gòu)鋼》注：Q345最新標(biāo)準(zhǔn)GB/T1591-2008 相對(duì)于老標(biāo)準(zhǔn)，最明顯的一個(gè)變化就是Mn元素含量的變化，從原來(lái)的1.0-1.60更正為≤1.70，取消了最小值的限定。隨著現(xiàn)代工業(yè)的發(fā)展，科技的不斷進(jìn)步，各種微量元素在鋼板中的應(yīng)用也更加廣泛，Mn含量不再是影響鋼材強(qiáng)度和機(jī)械性能的因素。所以中華人民共和國(guó)國(guó)家質(zhì)量監(jiān)督檢驗(yàn)檢疫總局和中國(guó)國(guó)家標(biāo)準(zhǔn)化管理委員會(huì)聯(lián)合發(fā)布實(shí)施的低合金高強(qiáng)度結(jié)構(gòu)鋼標(biāo)準(zhǔn)，取消Mn含量區(qū)間的限定，只規(guī)定最大值。Q345A鋼材對(duì)于Q345鋼材的檢測(cè)，一方面是鋼材的元素含量是否達(dá)到國(guó)標(biāo)要求，最重要的一方面是通過(guò)專(zhuān)業(yè)機(jī)構(gòu)檢測(cè)鋼材的機(jī)械性能（屈服強(qiáng)度、拉伸試驗(yàn)）是否達(dá)到標(biāo)準(zhǔn)。規(guī)格尺寸播報(bào)編輯Q345A規(guī)格厚度*寬度*長(zhǎng)度（mm）重量 （噸）定軋Q345A8*1500-2550*9200-12500186.188TQ345A9*1850-2600*9200-12450136.537TQ345A10*2650-3000*8000-10000221.381TQ345A12*1800-2550*9000-11000M235.377TQ345A14*1850-2500*7600-10000M165.027TQ345A15*2000-3000*6800-14000M238.839TQ345A16*2050-3000*8000-12100199.406TQ345A17*2200-2900*7600-11350M116.154TQ345A18*1700-2200*9300-15900M168.481TQ345A20*2200-3400*8800-10500164.316TQ345A22*2600-3100*8150-10100M187.631TQ345A24*1900-2360*8770-13700M148.956TQ345A25*2000-2950*8000-11000M175.095TQ345A26*2000-2950*9700-13000144.577TQ345A28*1800-2450*7800-1000089.771TQ345A30*1820-2450*9450-10800M145.525TQ345A32*1800-3200*8000-11200M180.433TQ345A34*1950-2850*8600-10200M125.526TQ345A35*1800-2700*7800-11800152.484TQ345A36*1950-2400*7800-11000132.29TQ345A38*2420-3200*9200-14000M120.093TQ345A40*1900-2800*8150-12000M164.953TQ345A44*1800-2400*8500-12000252.222TQ345A45*1800-2470*8350-10200174.363TQ345A46*1800-2340*8000-10900M225.464TQ345A48*1950-2850*9500-14000M156.281TQ345A50*1900-2800*9300-12500164.282TQ345A52*2100-2600*8800-12000113.544TQ345A55*1820-2300*8000-11800M318.904TQ345A56*2510-3200*9500-15400M132.992TQ345A59*2400-3100*8200-11400218.115TQ345A60*2220-2950*8500-12000220.604TQ345A64*2250-2850*8600-13150M368.781TQ345A65*1800-2500*8400-12000M288.327TQ345A70*2200-2900*9300-13000175.707TQ345A72*2250-2950*6000-9500130.14TQ345A74*2240-2980*8200-12000M227.67TQ345A75*1700-2800*7590-11500M181.904TQ345A76*2600-3100*3800-5600178.348TQ345A78*2320-2850*4500-9500129.489TQ345A80*2300-2900*9300-12000M215.319TQ345A82*2340-3100*5600-9500M226.585TQ345A85*2200-2500*9300-10350196.931TQ345A88*2130-2850*7400-10000208.962TQ345A90*2300-3600*9400-11000M250.461TQ345A92*2100-2900*6800-9800M326.431TQ345A95*2150-2680*9300-10850136.106TQ345A96*2150-2650*8050-11500126.043TQ345A98*1710-2470*9200-12400M281.438TQ345A100*1800-2500*8700-10500220.305TQ345A102*1900-2500*7950-10500330.139TQ345A105*2200-2950*6900-12300268.934TQ345A106*2600-3200*8750-11200M363.93TQ345A110*1700-2400*8000-11800220.523TQ345A112*1750-2400*6250-9600161.157TQ345A115*2200-2900*8500-11000M561.688TQ345A116*2400-3000*7200-10000M313.735TQ345A120*2000-2900*7000-10000320.042TQ345A125*1760-2560*8400-1040081.306TQ345A126*1760-2360*7800-12000M302.561TQ345A130*2600-3350*8500-10560M160.102TQ345A132*2030*2650*8500-12300360.88TQ345A135*2200-2900*9600-11500150.374TQ345A140*1700-2400*8100-12100M192.386TQ345A150*2100-2600*7200-11250M320.507TQ345A160*1960-2460*7600-12250320.062TQ345A180*1800-2300*7350-11250152.358TQ345A190*2210-2610*8400-12000M198.966TQ345A195*2200-2800*6600-9600M46.226TQ345A200*1720-3060*7000-1200069.408TQ345A202*2200-2900*4400-850088.35TQ345A210*1500-2200*5900-9500M68.589TQ345A215*1500-2500*8500-12000M96.563TQ345A220*2170-2670*6000-900058.866TQ345A230*1800-2300*6700-10000200.911TQ345A232*1800-2600*6200-11400M80.161TQ345A240*2000-2500*5000-10000M64.89TQ345A250*2100-2900*8500-1200086.599TQ345A260*1900-2500*6200-10000110.459TQ345A260*1970-2470*7500-11500M100.459TQ345A270*2000-2600*6000-11500M120.744TQ345A272*2070-2650*5000-950069.994TQ345A280*2390-3100*7500-1200090.836TQ345A290*1940-2600*6600-13000M79.177TQ345A300*2390-3200*6500-10000M56.675TQ345A320*2630-3500*9500-15000M261.823TQ345A其它規(guī)格協(xié)商定軋-化學(xué)成分播報(bào)編輯牌號(hào)CSiMnPSVNbAlTiQ345A0.20≤0.55≤1.70≤0.045≤0.0450.02-0.150.015-0.060-0.02-0.20Q345B≤0.20≤0.55≤1.70≤0.0400.0400.02-0.150.015-0.060-0.02-0.20Q345C≤0.20≤0.55≤1.70≤0.035≤0.0350.02-0.150.015-0.060≥0.0150.02-0.20Q345D0.18≤0.55≤1.80≤0.030≤0.0300.02-0.150.015-0.060≥0.0150.02-0.20Q345E≤0.18≤0.55≤1.80≤0.025≤0.0250.02-0.150.015-0.060≥0.0150.02-0.20定義播報(bào)編輯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235 MPa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。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，例如橋梁鋼、船用鋼等，基本上采用碳素結(jié)構(gòu)鋼的表示方法，但在鋼號(hào)最后附加表示用途的字母。Q345A的機(jī)械性能是什么：壁厚mm ≤16，伸長(zhǎng)率δ5≥（%）21，屈服強(qiáng)度δs(MPa≥) 345，試驗(yàn)溫度℃ 不需,抗拉強(qiáng)度σb(MPa≥)（470-630）。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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Q345A，是一種鋼材，強(qiáng)度好，但是性能差。它是低合金鋼，廣泛應(yīng)用于橋梁、車(chē)輛、船舶、建筑、壓力容器等。概述Q345A鋼材與Q345B，C，D，E鋼相比而言，低溫沖沖擊的試驗(yàn)溫度高，性能差，含有害物質(zhì)P,S量比Q345B,C,D,E要高。市場(chǎng)價(jià)格比Q345B,C,D,E要低Q345 是一種鋼材的材質(zhì)。它是低合金鋼，廣泛應(yīng)用于橋梁、車(chē)輛、船舶、建筑、壓力容器等。Q代表的是這種材質(zhì)的屈服，后面的345，就是指這種材質(zhì)的屈服值，在345MPa左右。并會(huì)隨著材質(zhì)的厚度的增加而使其屈服值減小。參考標(biāo)準(zhǔn)：GB/T1591-2008 《低合金高強(qiáng)度結(jié)構(gòu)鋼》注：Q345最新標(biāo)準(zhǔn)GB/T1591-2008 相對(duì)于老標(biāo)準(zhǔn)，最明顯的一個(gè)變化就是Mn元素含量的變化，從原來(lái)的1.0-1.60更正為≤1.70，取消了最小值的限定。隨著現(xiàn)代工業(yè)的發(fā)現(xiàn)，科技的不斷進(jìn)步，各種微量元素在鋼板中的應(yīng)用也更加廣泛，Mn含量不再是影響鋼材強(qiáng)度和機(jī)械性能的唯一因素。所以中華人民共和國(guó)國(guó)家質(zhì)量監(jiān)督檢驗(yàn)檢疫總局和中國(guó)國(guó)家標(biāo)準(zhǔn)化管理委員會(huì)聯(lián)合發(fā)布實(shí)施的低合金高強(qiáng)度結(jié)構(gòu)鋼標(biāo)準(zhǔn)，取消Mn含量區(qū)間的限定，只規(guī)定最大值。對(duì)于Q345鋼材的檢測(cè)，一方面是鋼材的元素含量是否達(dá)到國(guó)標(biāo)要求，最重要的一方面是通過(guò)專(zhuān)業(yè)機(jī)構(gòu)檢測(cè)鋼材的機(jī)械性能（屈服強(qiáng)度、拉伸試驗(yàn)）是否達(dá)到標(biāo)準(zhǔn)。
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