There are many kinds of reinforcing bars, which are generally classified according to chemical composition, production process, rolling shape, supply mode, diameter and use in structure.

1．按化学成分分

1. According to chemical constituents

碳素钢钢筋和一般低合金钢筋。碳素钢钢筋按碳量多少，又分为低碳钢钢筋（含碳量低于0.25％，如I级钢筋），中碳钢钢筋（含碳量0.25％～0.7％，如IV级钢筋），高碳钢钢筋（含碳量0.70％～1.4％，如碳素钢丝），碳素钢中除含有铁和碳元素外，还有少数在锻炼过程中带有的硅、锰、磷、硫等杂质。一般低合金钢钢筋是在低碳钢和中碳钢中参加少数合金元素，获得强度高和归纳功能好的钢种，在钢筋中常用的合金元素有硅、锰、钒、钛等，一般低合金钢钢筋首要品种有：20MnSi、40Si2MnV、45SiMnTi等。

Carbon steel bar and general low alloy steel bar. According to the amount of carbon, carbon steel bars are divided into low carbon steel bars (carbon content is less than 0.25%, such as grade I bars), medium carbon steel bars (carbon content is 0.25%-0.7%, such as grade IV bars), high carbon steel bars (carbon content is 0.70%-1.4%, such as carbon steel wires). In addition to iron and carbon elements, carbon steel contains a few impurities such as silicon, manganese, phosphorus and sulfur in the process of exercise. This is the case. Generally, low-alloy steel bars take part in a few alloying elements in low-carbon steel and medium-carbon steel to obtain steel grades with high strength and good inductive function. The commonly used alloying elements in steel bars are silicon, manganese, vanadium, titanium and so on. Generally, the main types of low-alloy steel bars are 20MnSi, 40Si2MnV, 45SiMnTi, etc.

2．按轧制外形分

2. According to rolling shape

（1）光面钢筋：I级钢筋（Q235钢钢筋）均轧制为光面圆形截面，供给方式有盘圆，直径不大于10mm，长度为6m~12m。

(1) Smooth reinforcing bars: Grade I reinforcing bars (Q235 reinforcing bars) are all rolled into smooth circular cross-section. The supply mode is circular, with a diameter not more than 10 mm and a length of 6 m~12 M.

（2）带肋钢筋：有螺旋形、人字形和月牙形三种，一般Ⅱ、Ⅲ级钢筋轧制成人字形，Ⅳ级钢筋轧制成螺旋形及月牙形。

(2) Ribbed bars: spiral, herringbone and crescent. Generally, grade II and III bars are rolled into herringbone and grade IV bars are rolled into helical and crescent shapes.

（3）钢线（分低碳钢丝和碳素钢丝两种）及钢绞线。

(3) Steel wire (low carbon steel wire and carbon steel wire) and strand.

（4）冷轧扭钢筋：经冷轧并冷扭成型。

(4) Cold-rolled and twisted bars: cold-rolled and cold-twisted.

3．按直径巨细分

3. Subdivision by diameter

钢丝（直径3~5mm）、细钢筋（直径6~10mm）、粗钢筋（直径大于22mm）。

Steel wire (diameter 3-5mm), fine steel bar (diameter 6-10mm), thick steel bar (diameter greater than 22mm).

4．按力学功能分

4. According to mechanical function

Ⅰ级钢筋（235/370级）；Ⅱ级钢筋（335/510级）；Ⅲ级钢筋（370/570）和Ⅳ级钢筋（540/835）

Grade I (235/370), Grade II (335/510), Grade III (370/570) and Grade IV (540/835)

5．按生产工艺分

5. According to the production process.

热轧、冷轧、冷拉的钢筋，还有以Ⅳ级钢筋经热处理而成的热处理钢筋，强度比前者更高。

The strength of hot-rolled, cold-rolled and cold-drawn steel bars and heat-treated steel bars made of grade IV steel bars is higher than that of the former.

6．按在结构中的效果分：受压钢筋、受拉钢筋、架立钢筋、散布钢筋、箍筋等装备在钢筋混凝土结构中的钢筋，按其效果可分为下列几种:

6. According to the effect in the structure, the steel bars equipped with compression, tension, erection, dispersal and stirrup in the reinforced concrete structure can be divided into the following categories according to their effect:

（1）受力筋——接受拉、压应力的钢筋。

(1) Stress bar - steel bar that accepts tension and compression stress.

（2）箍筋——接受一部分斜拉应力，并固定受力筋的方位，多用于梁和柱内。

(2) Stirrups, which accept part of the cable-tension stress and fix the direction of the stressed reinforcement, are mostly used in beams and columns.

（3）架立筋——用以固定梁内钢箍的方位，构成梁内的钢筋骨架。

(3) erecting bars, which are used to fix the orientation of steel hoops in beams and form the steel frame in beams.

（4）散布筋——用于屋面板、楼板内，与板的受力筋笔直布置，将接受的分量均匀地传给受力筋，并固定受力筋的方位，以及反抗热胀冷缩所引起的温度变形。

(4) Dispersive reinforcement - used in roof slabs and floor slabs. It is arranged in a straight line with the stressed reinforcement of the slabs. The accepted weight is evenly transmitted to the stressed reinforcement, and the orientation of the stressed reinforcement is fixed, as well as the temperature deformation caused by thermal expansion and cold contraction is resisted.

（5）其它——因构件结构要求或施工装置需求而装备的结构筋。如腰筋、预埋锚固筋、环等。

(5) Other structural bars equipped for structural requirements of components or construction devices. Such as waist tendons, embedded anchorage tendons, rings, etc.

以上信息是我们济南钢筋批发整理发布希望对大家有所帮助我们的网站是：http://www.jzqgc.com!

The above information is our Jinan reinforcing bar wholesale arrangement and release hope to help you all on our website is: http://www.jzqgc.com!