What is round iron? Dongguan steel wholesale small series tell you: cold drawing round iron: "cold drawing", refers to the drawing process under normal temperature, also refers to the method of applying drawing force on one end of the material to make the material through a mold hole, and the hole diameter of the mold is smaller than the diameter of the material. Cold drawn round iron refers to the round iron processed by the above methods.

　　冷拔圆铁在材料市场上，人们一般将冷拉圆钢和冷拔圆铁等同，其实两者有着完全不同的加工方式。在一般情况下人们也就按约定成俗的说法冷拉圆钢就是指冷拔圆铁。冷拉指的是在金属材料的两端施加拉力强行拉伸金属材料，使金属材料产生一定的塑性变形达到提高金属材料屈服点强度和延伸材料长度的目的。

　　In the material market, people generally equate cold drawn round steel with cold drawn round iron, in fact, they have totally different processing methods. In general, people also according to the conventional saying that cold drawn round steel refers to cold drawn round iron. Cold drawing refers to the application of tensile force on both ends of metal materials to stretch metal materials, so that metal materials produce certain plastic deformation to improve the yield point strength of metal materials and extend the length of materials.

　　冷拔加工使材料除了有拉伸变形外还有挤压变形，而冷拉加工材料则只有拉伸变形，所以经冷拔加工的材料要比经冷拉加工的材料性能更好些。冷拔加工一般要在专门的冷拔机上进行，冷拉则简单得多。

　　Cold drawing process makes materials have extrusion deformation in addition to tensile deformation, while cold drawing process materials only have tensile deformation, so the properties of materials processed by cold drawing process are better than those processed by cold drawing process. Cold drawing is generally carried out on a special cold drawing machine, while cold drawing is much simpler.