WHAT IS STEEL? (Part 4)

Classification of Steel By Manufacturing Processing

HOT ROLLED STEEL

Hot rolled steel refers to various steels produced by hot rolling, and most of the steel is hot rolled. This type of steel is commonly used to produce profile steel, steel pipe, steel plate and wire.

COLD ROLLED STEEL

Cold-rolled steel refers to various steels produced by cold rolling. Compared with hot-rolled steel, cold-rolled steel has the characteristics of smooth surface, accurate size, and good mechanical properties. This type of steel is commonly used to roll thin sheets and steel strips.

COLD DRAWN STEEL

Cold drawn steel refers to various steels produced by cold drawing, which have the characteristics of high precision and good surface quality. This type of steel is mainly used to produce steel wire and is also used to produce round steel and hexagonal bars with diameters below 50mm and steel pipes with diameters below 76mm.

CAST STEEL

Cast steel refers to a steel casting produced by casting method, and its carbon content is generally between 0.15-0.60%. Due to poor casting properties, steel castings often require heat treatment and alloying to improve their structure and properties. In the mechanical manufacturing industry, cast steel is mainly used to manufacture parts that are complex in shape, difficult to forge or cut, and require higher strength and plasticity.

FORGED STEEL

Forged steel refers to various forgings produced by forging method.

The quality of forged steel parts is higher than that of steel castings, and can withstand large impact, plasticity, and toughness. Other aspects of mechanical properties are also higher than steel castings, so for some important machine parts should be forged steel.