钢坯是炼钢炉炼成的钢水经过铸造后得到的产品。钢坯从制造工艺上主要可分为两种：模铸坯和连铸坯，模铸工艺已基本淘汰。

从外形上主要分为两种：

板坯：截面宽、高的比值较大，主要用来轧制板材。

方坯：截面宽、高相等，或差别不大，主要用来轧制型钢、线材。

钢坯本来就是钢材，通过加工以后可以用做机械零件，锻件，加工各种钢材，型钢Q345B槽钢，线材就是钢坯的作用。

钢坯是指用于生产钢材的半成品，一般不能直接供社会使用。 钢坯与钢材是有严格划分标准的，不能以是不是企业Z终产品来确定，而要按全社会统一的标准来执行。通常情况下，钢坯与钢材是比较容易区分的，但对于某些钢坯，与钢材具有同样规格和同样用途的（如轧制管坯），可通过是否供其他行业使用、是否经过钢材加工工艺过程、是否经过成品轧机加工来区分。

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The billet is a product obtained by casting molten steel obtained by a steelmaking furnace. Steel billets can be mainly divided into two types from the manufacturing process: die casting blanks and continuous casting billets, and the die casting process has been basically eliminated.

There are two main types in appearance:

Slab: The ratio of the width to the section is large, and it is mainly used for rolling sheets.

Billet: The section is wide and high, or the difference is not large. It is mainly used for rolling steel and wire.

The steel billet is originally steel. After processing, it can be used as mechanical parts, forgings, processing various steels, steel Q345B channel steel, and wire is the role of steel billets.

Steel billet refers to the semi-finished product used to produce steel, which is generally not directly available for social use. Billet and steel are strictly divided and cannot be determined by the final product of the enterprise, but by the unified standards of the whole society. In general, billets and steels are relatively easy to distinguish, but for some billets, the same specifications and the same use as steel (such as rolled billet) can be used for other industries, whether it is through the steel processing process. Whether it is processed by the finished rolling mill to distinguish.