角(jiao)(jiao)鋼(gang)(gang)俗(su)稱角(jiao)(jiao)鐵(tie)、是兩邊(bian)(bian)(bian)互相(xiang)垂直成(cheng)角(jiao)(jiao)形(xing)的(de)(de)長條鋼(gang)(gang)材。有等(deng)(deng)邊(bian)(bian)(bian)角(jiao)(jiao)鋼(gang)(gang)和(he)(he)不(bu)等(deng)(deng)邊(bian)(bian)(bian)角(jiao)(jiao)鋼(gang)(gang)之分。等(deng)(deng)邊(bian)(bian)(bian)角(jiao)(jiao)鋼(gang)(gang)的(de)(de) 兩個(ge)邊(bian)(bian)(bian)寬(kuan)相(xiang)等(deng)(deng)。其規格(ge)以邊(bian)(bian)(bian)寬(kuan)×邊(bian)(bian)(bian)寬(kuan)×邊(bian)(bian)(bian)厚的(de)(de)毫(hao)米(mi)(mi)數(shu)表(biao)(biao)示(shi)。如“∟30×30×3”，即表(biao)(biao)示(shi)邊(bian)(bian)(bian)寬(kuan)為(wei)(wei)(wei) 30毫(hao)米(mi)(mi)、邊(bian)(bian)(bian)厚為(wei)(wei)(wei)3毫(hao)米(mi)(mi)的(de)(de)等(deng)(deng)邊(bian)(bian)(bian)角(jiao)(jiao)鋼(gang)(gang)。也可(ke)用型(xing)號表(biao)(biao)示(shi)，型(xing)號是邊(bian)(bian)(bian)寬(kuan)的(de)(de)厘米(mi)(mi)數(shu)，如∟3#。型(xing)號不(bu)表(biao)(biao)示(shi)同(tong)一(yi)型(xing)號中不(bu)同(tong)邊(bian)(bian)(bian)厚的(de)(de)尺(chi)寸，因而在合同(tong)等(deng)(deng)單據上將角(jiao)(jiao)鋼(gang)(gang)的(de)(de)邊(bian)(bian)(bian)寬(kuan)、邊(bian)(bian)(bian)厚尺(chi)寸填寫齊全(quan)，避免單獨用型(xing)號表(biao)(biao)示(shi)。熱軋(ya)等(deng)(deng)邊(bian)(bian)(bian)角(jiao)(jiao)鋼(gang)(gang)的(de)(de)規格(ge)為(wei)(wei)(wei)2#-20#。角(jiao)(jiao)鋼(gang)(gang)可(ke)按結(jie)構(gou)(gou)的(de)(de)不(bu)同(tong)需要組成(cheng)各(ge)種不(bu)同(tong)的(de)(de)受力構(gou)(gou)件(jian)，也可(ke)作構(gou)(gou)件(jian)之間的(de)(de)連接件(jian)。廣泛(fan)地用于各(ge)種建筑結(jie)構(gou)(gou)和(he)(he)工程結(jie)構(gou)(gou)，如房(fang)梁、橋梁、輸(shu)電(dian)塔、起重運輸(shu)機械、船舶、工業爐、反(fan)應塔、容(rong)器架(jia)以及倉庫。