簡介

　　圓鋼是指截麵為圓形的實心長條鋼材。其規格以直徑的毫米數表示，如“ 50”即表示直徑為 50毫米的圓鋼。

材質

　　圓鋼材質：10#、20#、35#、45#、Q215-235、304、316、20Cr、40Cr、20CrMo、35CrMo、42CrMo、40CrNiMo、GCr15、65Mn、50Mn、50Cr、3Cr2W8V、20CrMnTi、5CrMnMo等。

圓鋼的理論計算公式

　　分類　　圓鋼是指截麵為圓形的實心長條鋼材。其規格以直徑的毫米數表示，如"50"即表示直徑為50毫米的圓鋼。　　圓鋼分為熱軋、鍛制和冷拉三種。熱軋圓鋼的規格為5.5-250毫米。其中：5.5-25毫米的小圓鋼大多以直條成捆供應，常用作鋼筋、螺栓及各種機械零件；大於25毫米的圓鋼，主要用於制造機械零件或作無縫鋼管坯　　圓鋼與其它鋼筋的區別：1 外型不一樣，圓鋼外型光圓，無紋無肋，其它鋼筋表麵外型有刻紋或有肋，這樣就造成圓鋼與混凝土的粘結力小，而其它鋼筋與混凝土的粘結力大。 2 成份不一樣，圓鋼(一級鋼)屬於普通低碳鋼，其它鋼筋多為合金鋼。3強度不一樣，圓鋼強度低，其它鋼強度高，即直徑大小相同的圓鋼與其它鋼筋相比，圓鋼所能承受的拉力要比其它鋼筋小，但圓鋼的塑性比其它鋼筋強，即圓鋼在被拉斷前有較大的變形,而其它鋼筋在被拉斷前的變形要小得多。

圓鋼的標準

　　標準：（GB699-1988、GB700-1988、GB3077-1988、GB702-1986、QJ/HG02.17-1991），下表為圓鋼詳細的標準:

ng>材質ng>	ng>規格ng>	ng>材質ng>	ng>規格ng>
ng>8#-10#ng>	ng>∮16-290ng>	ng>65Mnng>	ng>∮40-300ng>
ng>15#ng>	ng>∮14-150ng>	ng>45Mn2ng>	ng>∮18-75ng>
ng>20ng>ng>#ng>	ng>∮8-480ng>	ng>60Si2Mnng>	ng>∮16-150ng>
ng>35ng>ng>#ng>	ng>∮8-480ng>	ng>20CrMnTing>	ng>∮10-480ng>
ng>45ng>ng>#ng>	ng>∮6.5-480ng>	ng>20crmnTiBng>	ng>∮16-75ng>
ng>Q235Bng>	ng>∮6.5-180ng>	ng>GCr15ng>	ng>∮16-400ng>
ng>40Crng>	ng>∮8-480ng>	ng>ML35ng>	ng>∮8-150ng>
ng>20Crng>	ng>∮10-480ng>	ng>T8-T13ng>	ng>∮8-480ng>
ng>42CrMong>	ng>∮12-480ng>	ng>Cr12ng>	ng>∮16-300ng>
ng>35CrMong>	ng>∮12-480ng>	ng>Cr12MoVng>	ng>∮16-300ng>
ng>20CrMong>	ng>∮12-300ng>	ng>3Cr2W8Vng>	ng>∮16-300ng>
ng>38CrMoALng>	ng>∮20-300ng>	ng>45Cr50Crng>	ng>∮20-300ng>
ng>5CrMnMong>	ng>∮20-450ng>	ng>20CrMnMong>	ng>∮20-300ng>
ng>16Mnng>ng>（Q345B）ng>	ng>∮14-365ng>	ng>40Mn2ng>	ng>∮28-60ng>
ng>50Mnng>	ng>∮40-200ng>	ng>35Crng>	ng>∮55ng>
ng>15CrMong>	ng>∮21∮24∮75ng>	ng>15Mnng>	ng>∮32∮170ng>
ng>25ng>ng>#ng>	ng>∮16-280ng>	ng>40CrMnMong>	ng>∮80-∮160ng>
ng>YF45MnVng>	ng>∮28-80ng>	ng>20CrMnMong>	ng>∮20-300ng>
ng>30ng>ng>#ng>	ng>∮6.5-480ng>	ng>27 SiMnng>	ng>∮20-350ng>
ng>30Crmong>	ng>∮28ng>	ng>Crwmnng>	ng>∮20-300ng>
ng>30CrmnTing>	ng>∮16-300ng>	ng>H13(4Cr5MoSiVi)ng>	ng>∮20-300ng>
ng>60ng>ng>#ng>	ng>∮210.∮260ng>	ng>40crNimong>	ng>∮20-400ng>