27simn鋼管是一種截面較輕的中空27simn鋼管。薄壁鋼管又稱冷彎型鋼。它要用Q235熱扎或冷扎的。帶鋼或是，冷軋板指通過冷彎、成型和高頻焊接而成的方形截面的形狀和規格。熱扎大昌厚壁27simn鋼管除厚度提升外，角部規格及邊沿平面度均達到甚至超過電阻焊冷成型27simn鋼管的水準。具有較好的機械性能、焊接性、冷拉、熱處理和耐腐蝕性，低溫韌性好。

　　2.27simn鋼(gang)管應用(yong)

　　27simn鋼管用以建(jian)筑(zhu)、機(ji)(ji)械(xie)制造、鋼結構等(deng)工程、造船、太陽能支架(jia)、鋼材(cai)等(deng)。結構工程電(dian)力(li)(li)(li)力(li)(li)(li)工程電(dian)力(li)(li)(li)廠，農業和(he)化學(xue)機(ji)(ji)械(xie)，幕(mu)墻玻(bo)璃(li)，底盤，機(ji)(ji)場,鍋(guo)爐修建(jian)，高速路(lu)護(hu)欄，房屋建(jian)筑(zhu)，壓力(li)(li)(li)容器，石油儲罐，橋梁電(dian)力(li)(li)(li)站設(she)備，起重運輸機(ji)(ji)械(xie)及其它較高負載(zai)的(de)焊接結構件(jian)等(deng)。

　　27simn鋼(gang)(gang)(gang)(gang)(gang)管的(de)(de)(de)規格可(ke)用腰(yao)(yao)(yao)高(gao)(gao)(h)*腿寬(kuan)(kuan)(kuan)(b)*腰(yao)(yao)(yao)厚(hou)(d)表(biao)(biao)明(ming)(ming)，如“工(gong)(gong)(gong)(gong)200*100*7”，即表(biao)(biao)明(ming)(ming)腰(yao)(yao)(yao)高(gao)(gao)為(wei)(wei)200mm，腿寬(kuan)(kuan)(kuan)為(wei)(wei)100mm，腰(yao)(yao)(yao)厚(hou)為(wei)(wei)7mm工(gong)(gong)(gong)(gong)型(xing)(xing)(xing)(xing)鋼(gang)(gang)(gang)(gang)(gang)的(de)(de)(de)規格還可(ke)用型(xing)(xing)(xing)(xing)號(hao)(hao)表(biao)(biao)明(ming)(ming)，型(xing)(xing)(xing)(xing)號(hao)(hao)表(biao)(biao)明(ming)(ming)腰(yao)(yao)(yao)強(qiang)的(de)(de)(de)厘米數，如工(gong)(gong)(gong)(gong)20#。腰(yao)(yao)(yao)高(gao)(gao)同樣(yang)的(de)(de)(de)27simn鋼(gang)(gang)(gang)(gang)(gang)管，如有幾(ji)種不(bu)同的(de)(de)(de)腿寬(kuan)(kuan)(kuan)和(he)(he)(he)腰(yao)(yao)(yao)厚(hou)，需(xu)在(zai)型(xing)(xing)(xing)(xing)號(hao)(hao)右側加abc給予差(cha)別，如20#a、20#b、20#c等(deng)。工(gong)(gong)(gong)(gong)型(xing)(xing)(xing)(xing)鋼(gang)(gang)(gang)(gang)(gang)20#a200*100*7;27simn鋼(gang)(gang)(gang)(gang)(gang)管20#b200*102*927simn鋼(gang)(gang)(gang)(gang)(gang)管又稱為(wei)(wei)鋼(gang)(gang)(gang)(gang)(gang)柱(英文名字(zi)UniversalBeam)，是(shi)(shi)截面(mian)為(wei)(wei)工(gong)(gong)(gong)(gong)字(zi)形(xing)狀的(de)(de)(de)條形(xing)鋼(gang)(gang)(gang)(gang)(gang)材。27simn鋼(gang)(gang)(gang)(gang)(gang)管分普通工(gong)(gong)(gong)(gong)型(xing)(xing)(xing)(xing)鋼(gang)(gang)(gang)(gang)(gang)和(he)(he)(he)輕(qing)(qing)型(xing)(xing)(xing)(xing)工(gong)(gong)(gong)(gong)字(zi)鋼(gang)(gang)(gang)(gang)(gang)。是(shi)(shi)截面(mian)形(xing)狀為(wei)(wei)工(gong)(gong)(gong)(gong)字(zi)型(xing)(xing)(xing)(xing)的(de)(de)(de)型(xing)(xing)(xing)(xing)鋼(gang)(gang)(gang)(gang)(gang)。工(gong)(gong)(gong)(gong)型(xing)(xing)(xing)(xing)鋼(gang)(gang)(gang)(gang)(gang)主要分為(wei)(wei)一般(ban)工(gong)(gong)(gong)(gong)型(xing)(xing)(xing)(xing)鋼(gang)(gang)(gang)(gang)(gang)、輕(qing)(qing)型(xing)(xing)(xing)(xing)工(gong)(gong)(gong)(gong)字(zi)鋼(gang)(gang)(gang)(gang)(gang)和(he)(he)(he)寬(kuan)(kuan)(kuan)翼緣工(gong)(gong)(gong)(gong)型(xing)(xing)(xing)(xing)鋼(gang)(gang)(gang)(gang)(gang)。按翼緣與腹板高(gao)(gao)度比(bi)又分為(wei)(wei)寬(kuan)(kuan)(kuan)幅(fu)、中幅(fu)、窄(zhai)幅(fu)寬(kuan)(kuan)(kuan)翼緣工(gong)(gong)(gong)(gong)型(xing)(xing)(xing)(xing)鋼(gang)(gang)(gang)(gang)(gang)。前二者制造的(de)(de)(de)規格為(wei)(wei)10—60號(hao)(hao)，即對應(ying)的(de)(de)(de)高(gao)(gao)度為(wei)(wei)10cm—60cm。在(zai)相(xiang)同高(gao)(gao)度下，輕(qing)(qing)型(xing)(xing)(xing)(xing)工(gong)(gong)(gong)(gong)字(zi)鋼(gang)(gang)(gang)(gang)(gang)翼緣窄(zhai)、梁端(duan)薄、重量輕(qing)(qing)。寬(kuan)(kuan)(kuan)翼緣工(gong)(gong)(gong)(gong)型(xing)(xing)(xing)(xing)鋼(gang)(gang)(gang)(gang)(gang)又稱H型(xing)(xing)(xing)(xing)鋼(gang)(gang)(gang)(gang)(gang)，斷(duan)面(mian)特征(zheng)是(shi)(shi)兩腿平行，且(qie)腿內側沒有斜度。是(shi)(shi)屬于經濟(ji)斷(duan)面(mian)型(xing)(xing)(xing)(xing)鋼(gang)(gang)(gang)(gang)(gang)，要在(zai)四輥全能軋機上冷軋的(de)(de)(de)，因(yin)此又稱“全能27simn鋼(gang)(gang)(gang)(gang)(gang)管”。一般(ban)27simn鋼(gang)(gang)(gang)(gang)(gang)管、輕(qing)(qing)型(xing)(xing)(xing)(xing)工(gong)(gong)(gong)(gong)字(zi)鋼(gang)(gang)(gang)(gang)(gang)已經形(xing)成規范。鍍鋅(xin)(xin)(xin)管分熱(re)(re)鍍鋅(xin)(xin)(xin)和(he)(he)(he)電鍍鋅(xin)(xin)(xin)兩種，熱(re)(re)鍍鋅(xin)(xin)(xin)鍍鋅(xin)(xin)(xin)層(ceng)厚(hou)，具備涂層(ceng)勻稱，附著(zhu)力(li)強(qiang)，堅固(gu)耐(nai)用等(deng)優點。電鍍鋅(xin)(xin)(xin)成本低(di)，表(biao)(biao)層(ceng)不(bu)太(tai)光滑，其自身(shen)的(de)(de)(de)耐(nai)腐蝕性比(bi)熱(re)(re)鍍鋅(xin)(xin)(xin)管相(xiang)差(cha)許多。

　　為提升27simn鋼(gang)(gang)管的耐腐蝕性能(neng)，對一般鋼(gang)(gang)管開展(zhan)鍍鋅(xin)。27simn鋼(gang)(gang)管分熱(re)鍍鋅(xin)和電鍍鋅(xin)兩種，熱(re)鍍鋅(xin)鍍鋅(xin)層(ceng)厚，電鍍鋅(xin)成本低，表層(ceng)不太(tai)光滑。

　　舊房子大(da)(da)部分用(yong)的都是鍍(du)鋅管(guan)(guan)，如今煤氣、暖(nuan)氣用(yong)的那種鐵管(guan)(guan)也是鍍(du)鋅管(guan)(guan)，27simn鋼管(guan)(guan)做為水(shui)管(guan)(guan)，應用(yong)幾年后，管(guan)(guan)中產生(sheng)大(da)(da)量(liang)銹垢(gou)，流出的黃水(shui)不僅污染潔(jie)具，并且摻雜著(zhu)不光滑內(nei)壁滋(zi)生(sheng)的病菌，生(sheng)銹導致水(shui)中重金屬含量(liang)太高，嚴重危害人體健康。