有5个网友回答
1、规格不一样
圆钢是指截面为圆形的实心长条钢材。其规格以直径表示,单位毫米(mm),如“ 50mm”即表示直径为50毫米的圆钢。 优质碳素结构钢简称碳结钢·。具体的讲就是其含碳量小于0.08%。
2、外型不一样
圆钢外型光圆,无纹无肋,碳结钢表面外型有刻纹或有肋,这样就造成圆钢与混凝土的粘结力小,碳结钢与混凝土的粘结力大。

3、成份不一样
圆钢(一级钢)属于普通低碳钢,碳结钢筋多为合金钢。

4、概念不同
圆钢是指截面为圆形的实心长条钢材。其规格以直径表示,单位毫米(mm),如“ 50mm”即表示直径为50毫米的圆钢。
优质碳素结构钢简称碳结钢·。具体的讲就是其含碳量小于0.08%。与普碳钢相比,其质量较优,有严格的化学成分并且要求保证力学性能指标,磷、硫等有豁杂质含量较低的优质碳素结构钢。
5、用法不同
圆钢含碳量在0.65~1.35%之间,经热处理后可得到高硬度和高耐磨性,主要用于制造各种工具、刃具、模具和量具(见工具钢)。
碳结钢的用途,碳结钢牌号以数字来表示,数字低含碳量低。低碳钢包括碳结钢牌号为:08F,10F等,具有良好的塑性和韧性,常经表面热处理制造要求表面硬而耐磨、而心部有良好真心性的零件。
参考资料来源:百度百科-圆钢
参考资料来源:百度百科-碳素钢
钢铁材料可分1.碳素钢 2.合金钢 3.铸铁。 碳素钢按碳的含量分1.低碳钢≤ 0.25%。2.中碳钢0.25%—0.60%.3.高碳钢>0.6%。按钢的质量分1.普通碳素钢 含硫量≤0.050%,含磷量≤0.045%.优质碳素钢 含硫量≤0.035%,含磷量≤0.035%.高级优质碳素钢 含硫量≤0.025%,含磷量≤0.025%.按用途分1.碳素结构钢 主要用于制造各种机械零件和工程构件,其含碳量一般小于0.70%.2.碳素工具钢 主要用于制造各种刀具、模具和量具等,其含碳量一般大于0.70%.
45号钢是优质碳素钢。45表示该钢的平均含碳量的万分数。
钢铁材料按形状可分钢板、圆钢、方钢、型钢等等
你所说的圆钢和碳素钢完全是两个概念
钢材以形状分圆钢和板钢两种,
钢材以功能分,结构钢是其中的一种,
它俩不是一种定义
45现在的价格在7000以下,
圆钢比结构钢的制造容易些,还要更便宜些
圆钢:http://baike.baidu.com/view/130269.htm
碳钢:http://baike.baidu.com/view/647303.htm
价格,试试“我的钢铁网”:http://www.mysteel.com/
不过要注册,其他网站不知道不好意思
1、圆钢是指截面为圆形的实心长条钢材。其规格以直径表示,单位毫米(mm),如“ 50mm”即表示直径为50毫米的圆钢。
优质碳素结构钢简称碳结钢·。具体的讲就是其含碳量小于0.08%。与普碳钢相比,其质量较优,有严格的化学成分并且要求保证力学性能指标,磷、硫等有豁杂质含量较低的优质碳素结构钢。
2、外型不一样,圆钢外型光圆,无纹无肋,碳结钢表面外型有刻纹或有肋,这样就造成圆钢与混凝土的粘结力小,碳结钢与混凝土的粘结力大。
3、成份不一样,圆钢(一级钢)属于普通低碳钢,碳结钢筋多为合金钢。
4、强度不一样,圆钢强度低,碳结钢强度高,即直径大小相同的圆钢与其它钢筋相比,圆钢所能承受的拉力要比其它钢筋小,但圆钢的塑性比其它钢筋强,即圆钢在被拉断前有较大的变形,而在碳结钢被拉断前的变形要小得多。
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