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.index-module_taskLogo__71Tj5{height:66px;position:absolute;right:30px;top:0;width:66px}.index-module_drawerHand__aRhcO.index-module_open__qMl5O{right:480px}.index-module_reverse__OKr6k{transform:rotate(180deg)}網(wǎng)頁(yè)新聞貼吧知道網(wǎng)盤圖片視頻地圖文庫(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)專題加入百科百科團(tuán)隊(duì)權(quán)威合作個(gè)人中心Q235B播報(bào)討論上傳視頻碳素結(jié)構(gòu)鋼收藏查看我的收藏0有用+10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。中文名碳鋼外文名Q235B應(yīng) 用橋梁鋼、船用鋼碳含量≤0.2%錳含量≤1.4%目錄1碳鋼2優(yōu)質(zhì)碳鋼3碳工具鋼4易切削鋼5合金鋼6低高鋼7彈簧鋼8滾軸鋼9電工純鐵10電工鋼碳鋼播報(bào)編輯碳素結(jié)構(gòu)鋼專門用途的碳素鋼，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。優(yōu)質(zhì)碳鋼播報(bào)編輯優(yōu)質(zhì)碳素結(jié)構(gòu)鋼①鋼號(hào)開頭的兩位數(shù)字表示鋼的碳含量，以平均碳含量的萬(wàn)分之幾表示，例如平均碳含量為0.45%的鋼，鋼號(hào)為“45”，它不是順序號(hào)，所以不能讀成45號(hào)鋼。②錳含量較高的優(yōu)質(zhì)碳素結(jié)構(gòu)鋼，應(yīng)將錳元素標(biāo)出，例如50Mn。③沸騰鋼、半鎮(zhèn)靜鋼及專門用途的優(yōu)質(zhì)碳素結(jié)構(gòu)鋼應(yīng)在鋼號(hào)最后特別標(biāo)出，例如平均碳含量為0.1%的半鎮(zhèn)靜鋼，其鋼號(hào)為10b。④優(yōu)質(zhì)碳素結(jié)構(gòu)鋼是按化學(xué)成分和機(jī)械性能供應(yīng)的。鋼中的硫、磷及非金屬夾雜物的含量較少，表明質(zhì)量，組織結(jié)構(gòu)的均勻性能較好，常用于需要經(jīng)過(guò)熱處理的各種較重要的機(jī)械結(jié)構(gòu)零件。⑤根據(jù)化學(xué)成分的不同，優(yōu)質(zhì)碳素結(jié)構(gòu)鋼又分為普通含錳量鋼和較高含錳量鋼兩類。碳工具鋼播報(bào)編輯碳素工具鋼①鋼號(hào)冠以“T”，以免與其他鋼類相混。②鋼號(hào)中的數(shù)字表示碳含量，以平均碳含量的千分之幾表示。例如“T8”表示平均碳含量為0.8%。③錳含量較高者，在鋼號(hào)最后標(biāo)出“Mn”，例如“T8Mn”。④高級(jí)優(yōu)質(zhì)碳素工具鋼的磷、硫含量，比一般優(yōu)質(zhì)碳素工具鋼低，在鋼號(hào)最后加注字母“A”，以示區(qū)別，例如“T8MnA”。易切削鋼播報(bào)編輯Q235B①鋼號(hào)冠以“Y”，以區(qū)別于優(yōu)質(zhì)碳素結(jié)構(gòu)鋼。②字母“Y”后的數(shù)字表示碳含量，以平均碳含量的萬(wàn)分之幾表示，例如平均碳含量為0.3%的易切削鋼，其鋼號(hào)為“Y30”。③錳含量較高者，亦在鋼號(hào)后標(biāo)出“Mn”，例如“Y40Mn”。合金鋼播報(bào)編輯合金結(jié)構(gòu)鋼①鋼號(hào)開頭的兩位數(shù)字表示鋼的碳含量，以平均碳含量的萬(wàn)分之幾表示，如40Cr。②鋼中主要合金元素，除個(gè)別微合金元素外，一般以百分之幾表示。當(dāng)平均合金含量≤1.5%時(shí)，鋼號(hào)中一般只標(biāo)出元素符號(hào)，而不標(biāo)明含量，但在特殊情況下易致混淆者，在元素符號(hào)后亦可標(biāo)以數(shù)字“1”，例如鋼號(hào)“12CrMoV”和“12Cr1MoV”，前者鉻含量為0.4-0.6%，后者為0.9-1.2%，其余成分全部相同。當(dāng)合金元素平均含量≥1.5%、≥2.5%、≥3.5%……時(shí)，在元素符號(hào)后面應(yīng)標(biāo)明含量，可相應(yīng)表示為2、3、4……等。例如18Cr2Ni4WA。③鋼中的釩V、鈦Ti、鋁AL、硼B(yǎng)、稀土RE等合金元素，均屬微合金元素，雖然含量很低，仍應(yīng)在鋼號(hào)中標(biāo)出。例如20MnVB鋼中。釩為0.07-0.12%，硼為0.001-0.005%。④高級(jí)優(yōu)質(zhì)鋼應(yīng)在鋼號(hào)最后加“A”，以區(qū)別于一般優(yōu)質(zhì)鋼。⑤專門用途的合金結(jié)構(gòu)鋼，鋼號(hào)冠以（或后綴）代表該鋼種用途的符號(hào)。例如，鉚螺專用的30CrMnSi鋼，鋼號(hào)表示為ML30CrMnSi。低高鋼播報(bào)編輯低合金高強(qiáng)度鋼①鋼號(hào)的表示方法，基本上和合金結(jié)構(gòu)鋼相同。②對(duì)專業(yè)用低合金高強(qiáng)度鋼，應(yīng)在鋼號(hào)最后標(biāo)明。例如16Mn鋼，用于橋梁的專用鋼種為“16Mnq”，汽車大梁的專用鋼種為“16MnL”，壓力容器的專用鋼種為“16MnR”。彈簧鋼播報(bào)編輯彈簧鋼按化學(xué)成分可分為碳素彈簧鋼和合金彈簧鋼兩類，其鋼號(hào)表示方法，前者基本上與優(yōu)質(zhì)碳素結(jié)構(gòu)鋼相同，后者基本上與合金結(jié)構(gòu)鋼相同。滾軸鋼播報(bào)編輯滾動(dòng)軸承鋼①鋼號(hào)冠以字母“G”，表示滾動(dòng)軸承鋼類。②高碳鉻軸承鋼鋼號(hào)的碳含量不標(biāo)出，鉻含量以千分之幾表示。例如GCr15。滲碳軸承鋼的鋼號(hào)表示方法，基本上和合金結(jié)構(gòu)鋼相同電工純鐵播報(bào)編輯電工用純鐵①它的牌號(hào)由字母“DT”和數(shù)字組成，“DT”表示電工用純鐵，數(shù)字表示不同牌號(hào)的順序號(hào)，例如DT3。②在數(shù)字后面所加的字母表示電磁性能：A——高級(jí)、E——特級(jí)、C——超級(jí)，例如DT8A。電工鋼播報(bào)編輯電工用不銹鋼Q235B它的鋼號(hào)前冠以字母“H”，以區(qū)別于其他鋼類。例如不銹鋼焊絲為“H2Cr13”，可以區(qū)別于不銹鋼“2Cr13”。①鋼號(hào)由字母和數(shù)字組成。鋼號(hào)頭部字母DR表示電工用熱軋硅鋼，DW表示電工用冷軋無(wú)取向硅鋼，DQ表示電工用冷軋取向硅鋼。②字母之后的數(shù)字表示鐵損值（W/kg）的100倍。③鋼號(hào)尾部加字母“G”者，表示在高頻率下檢驗(yàn)的；未加“G”者，表示在頻率為50周波下檢驗(yàn)的。例如鋼號(hào)DW470表示電工用冷軋無(wú)取向硅鋼產(chǎn)品在50赫頻率時(shí)的最大單位重量鐵損值為4.7W/kg。Q235B性能Q235B有一定的伸長(zhǎng)率、強(qiáng)度，良好的韌性和鑄造性，易于沖壓和焊接，廣泛用于一般機(jī)械零件的制造。主要用于建筑、橋梁工程上質(zhì)量要求較高的焊接結(jié)構(gòu)件。Q235A和Q235B的區(qū)別：鋼材皆屬于碳素鋼。在國(guó)家標(biāo)準(zhǔn)GB700—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的鋼材含碳量不大于0.22﹪，材質(zhì)是Q235B的鋼材含碳量不大于0.20﹪；Q235A的材質(zhì)不做沖擊實(shí)驗(yàn)，Q235B的材質(zhì)而是做常溫沖擊實(shí)驗(yàn)，V型缺口。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，鋼廠在成品型材出廠之前都在標(biāo)識(shí)牌上做了標(biāo)識(shí)。用戶可以在標(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≥20mmQ235B元素含量Q235B碳 C ：≤0.20%硅 Si：≤0.35%錳 Mn：≤1.4%硫 S ：≤0.045%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、b、Z新手上路成長(zhǎng)任務(wù)編輯入門編輯規(guī)則本人編輯我有疑問(wèn)內(nèi)容質(zhì)疑在線客服官方貼吧意見反饋投訴建議舉報(bào)不良信息未通過(guò)詞條申訴投訴侵權(quán)信息封禁查詢與解封?2024?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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碳鋼碳素結(jié)構(gòu)鋼專門用途的碳素鋼，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。優(yōu)質(zhì)碳鋼優(yōu)質(zhì)碳素結(jié)構(gòu)鋼①鋼號(hào)開頭的兩位數(shù)字表示鋼的碳含量，以平均碳含量的萬(wàn)分之幾表示，例如平均碳含量為0.45%的鋼，鋼號(hào)為“45”，它不是順序號(hào)，所以不能讀成45號(hào)鋼。②錳含量較高的優(yōu)質(zhì)碳素結(jié)構(gòu)鋼，應(yīng)將錳元素標(biāo)出，例如50Mn。③沸騰鋼、半鎮(zhèn)靜鋼及專門用途的優(yōu)質(zhì)碳素結(jié)構(gòu)鋼應(yīng)在鋼號(hào)最后特別標(biāo)出，例如平均碳含量為0.1%的半鎮(zhèn)靜鋼，其鋼號(hào)為10b。④優(yōu)質(zhì)碳素結(jié)構(gòu)鋼是按化學(xué)成分和機(jī)械性能供應(yīng)的。鋼中的硫、磷及非金屬夾雜物的含量較少，表明質(zhì)量，組織結(jié)構(gòu)的均勻性能較好，常用于需要經(jīng)過(guò)熱處理的各種較重要的機(jī)械結(jié)構(gòu)零件。⑤根據(jù)化學(xué)成分的不同，優(yōu)質(zhì)碳素結(jié)構(gòu)鋼又分為普通含錳量鋼和較高含錳量鋼兩類。碳工具鋼碳素工具鋼①鋼號(hào)冠以“T”，以免與其他鋼類相混。②鋼號(hào)中的數(shù)字表示碳含量，以平均碳含量的千分之幾表示。例如“T8”表示平均碳含量為0.8%。③錳含量較高者，在鋼號(hào)最后標(biāo)出“Mn”，例如“T8Mn”。④高級(jí)優(yōu)質(zhì)碳素工具鋼的磷、硫含量，比一般優(yōu)質(zhì)碳素工具鋼低，在鋼號(hào)最后加注字母“A”，以示區(qū)別，例如“T8MnA”。易切削鋼①鋼號(hào)冠以“Y”，以區(qū)別于優(yōu)質(zhì)碳素結(jié)構(gòu)鋼。②字母“Y”后的數(shù)字表示碳含量，以平均碳含量的萬(wàn)分之幾表示，例如平均碳含量為0.3%的易切削鋼，其鋼號(hào)為“Y30”。③錳含量較高者，亦在鋼號(hào)后標(biāo)出“Mn”，例如“Y40Mn”。合金鋼合金結(jié)構(gòu)鋼①鋼號(hào)開頭的兩位數(shù)字表示鋼的碳含量，以平均碳含量的萬(wàn)分之幾表示，如40Cr。②鋼中主要合金元素，除個(gè)別微合金元素外，一般以百分之幾表示。當(dāng)平均合金含量<1.5%時(shí)，鋼號(hào)中一般只標(biāo)出元素符號(hào)，而不標(biāo)明含量，但在特殊情況下易致混淆者，在元素符號(hào)后亦可標(biāo)以數(shù)字“1”，例如鋼號(hào)“12CrMoV”和“12Cr1MoV”，前者鉻含量為0.4-0.6%，后者為0.9-1.2%，其余成分全部相同。當(dāng)合金元素平均含量≥1.5%、≥2.5%、≥3.5%……時(shí)，在元素符號(hào)后面應(yīng)標(biāo)明含量，可相應(yīng)表示為2、3、4……等。例如18Cr2Ni4WA。③鋼中的釩V、鈦Ti、鋁AL、硼B(yǎng)、稀土RE等合金元素，均屬微合金元素，雖然含量很低，仍應(yīng)在鋼號(hào)中標(biāo)出。例如20MnVB鋼中。釩為0.07-0.12%，硼為0.001-0.005%。④高級(jí)優(yōu)質(zhì)鋼應(yīng)在鋼號(hào)最后加“A”，以區(qū)別于一般優(yōu)質(zhì)鋼。⑤專門用途的合金結(jié)構(gòu)鋼，鋼號(hào)冠以（或后綴）代表該鋼種用途的符號(hào)。例如，鉚螺專用的30CrMnSi鋼，鋼號(hào)表示為ML30CrMnSi。低高鋼低合金高強(qiáng)度鋼①鋼號(hào)的表示方法，基本上和合金結(jié)構(gòu)鋼相同。②對(duì)專業(yè)用低合金高強(qiáng)度鋼，應(yīng)在鋼號(hào)最后標(biāo)明。例如16Mn鋼，用于橋梁的專用鋼種為“16Mnq”，汽車大梁的專用鋼種為“16MnL”，壓力容器的專用鋼種為“16MnR”。彈簧鋼彈簧鋼按化學(xué)成分可分為碳素彈簧鋼和合金彈簧鋼兩類，其鋼號(hào)表示方法，前者基本上與優(yōu)質(zhì)碳素結(jié)構(gòu)鋼相同，后者基本上與合金結(jié)構(gòu)鋼相同。滾軸鋼滾動(dòng)軸承鋼①鋼號(hào)冠以字母“G”，表示滾動(dòng)軸承鋼類。②高碳鉻軸承鋼鋼號(hào)的碳含量不標(biāo)出，鉻含量以千分之幾表示。例如GCr15。滲碳軸承鋼的鋼號(hào)表示方法，基本上和合金結(jié)構(gòu)鋼相同電工純鐵電工用純鐵①它的牌號(hào)由字母“DT”和數(shù)字組成，“DT”表示電工用純鐵，數(shù)字表示不同牌號(hào)的順序號(hào)，例如DT3。②在數(shù)字后面所加的字母表示電磁性能：A——高級(jí)、E——特級(jí)、C——超級(jí)，例如DT8A。電工鋼電工用不銹鋼它的鋼號(hào)前冠以字母“H”，以區(qū)別于其他鋼類。例如不銹鋼焊絲為“H2Cr13”，可以區(qū)別于不銹鋼“2Cr13”。①鋼號(hào)由字母和數(shù)字組成。鋼號(hào)頭部字母DR表示電工用熱軋硅鋼，DW表示電工用冷軋無(wú)取向硅鋼，DQ表示電工用冷軋取向硅鋼。②字母之后的數(shù)字表示鐵損值（W/kg）的100倍。③鋼號(hào)尾部加字母“G”者，表示在高頻率下檢驗(yàn)的；未加“G”者，表示在頻率為50周波下檢驗(yàn)的。例如鋼號(hào)DW470表示電工用冷軋無(wú)取向硅鋼產(chǎn)品在50赫頻率時(shí)的最大單位重量鐵損值為4.7W/kg。Q235B性能Q235B有一定的伸長(zhǎng)率、強(qiáng)度，良好的韌性和鑄造性，易于沖壓和焊接，廣泛用于一般機(jī)械零件的制造。主要用于建筑、橋梁工程上質(zhì)量要求較高的焊接結(jié)構(gòu)件。Q235A和Q235B的區(qū)別：鋼材皆屬于碳素鋼。在國(guó)家標(biāo)準(zhǔn)GB700—88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)含碳量在0.14—0.22﹪之間；Q235A的材質(zhì)不做沖擊實(shí)驗(yàn)，Q235B的材質(zhì)而是做常溫沖擊實(shí)驗(yàn)，V型缺口。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，鋼廠在成品型材出廠之前都在標(biāo)識(shí)牌上做了標(biāo)識(shí)。用戶可以在標(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>=20mmQ235B元素含量碳 C ：≤0.20%硅 Si：≤0.35%錳 Mn：≤1.4%硫 S ：≤0.045%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、b、Z
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