Hot Rolled VS Cold Rolled Steel, Is it Only Hot & Cold? You Don't Know the Big Difference?

            Tag:  cold-rolled steel bars,  Carbide wire tools, GB/T 19001-2016 / ISO 9001:2015

Hot-rolled steel bars are directly processed on steel molds in steel furnaces in steel processing plants. They are hot products (so called "hot-rolled") that come out of the furnace and can be used after cooling. In the case of cold-rolled steel bars, the hot-rolled steel bars are further subjected to cold working to obtain steel bars, such as cold drawing and drawing of the steel bars at normal temperature. Carbide wire tools are required for both hot and cold rolled bars. 

We has been focusing on the hard alloy wire mould industry for 20 years and started to expand its international export trade in 2010. It has occupied Southeast Asia, the Middle East, South America and most of Europe, and exports to more than 38 countries. It mainly produces processing rolls and wire drawing dies. The over-line mold, wherein the rolls include cold rolls, hot rolls, dephosphorization rolls, straightening rolls, strain relief rolls, and the like. Our quality testing of raw materials is very strict, the products are sintered under low pressure, and the selection of the grades and the control of the market are very precise. We have a Malaysian customer who once produced a batch of steel bars with a non-performing rate of 30%. Originally, he purchased some rolls from other suppliers for price reasons. Later, according to the information provided by the customer, we analyzed the use of the roll number. . And because our profession has now become our loyal VIP customer, we will roll down every 2-3 months, and we will continue to maintain a good relationship.

The difference between hot rolled and cold rolled steel: the difference between the two is not only the difference between heat and cold, but the strength between them, the yield point, and the tensile strength, etc., then we Let's take a look.

1. Hot-rolled steel bars are finished steel bars that have been hot-rolled and naturally cooled. They are pressed from low-carbon steel and ordinary alloy steel at high temperature. They are mainly used for reinforcement of reinforced concrete and prestressed concrete structures. One of the most used steel products in the project. Generally, steel bars with a diameter of 6.5 to 9 mm are mostly rolled into wire rods; straight wires having a diameter of 10 to 40 mm are generally 6 to 12 meters long.

2. The cold-rolled steel bar is obtained by cold-rolling the hot-rolled steel bar to obtain the steel bar. For example, the steel bar is cold drawn and drawn at normal temperature. These processes require the use of a cold roll, a drawing die and the like. Hot rolled steel has lower yield strength and good plasticity. Cold-rolled steel has high yield strength and poor plasticity, and the ultimate tensile strength is the same.

3. Third, hot-rolled steel and cold-rolled steel bars can be seen at a glance which hot rolling which is cold rolling?

Hot-rolled steel bars are ‘H’, such as hot-rolled ribbed HRB335, HRB40, etc., cold-rolled steel bars are “C”, such as cold-rolled ribbed steel bars CRB550, CRB650, etc. Everyone remembers what letters are hot-rolled and cold-rolled steel, and it's easy to tell.

We specializes in exporting cold-rolled ribbed steel rolls (FO/CA/RT/RO/PR), and provides de-phosphorus sticks, straightening rolls, stress-relieving rolls, mandrels and other steel wire rolls, which can provide customers with one stop. Service and ISO certification (GB/T 19001-2016 / ISO 9001:2015), with the high cost performance and best service of its products, the customers are highly praised and committed to become an excellent supplier of China's hard alloy materials. The majority of steel wire manufacturers provide one-stop service, tailor-made personalized, branded wire tools for customers to improve production efficiency and maximize benefits.

Edited by: Sophie Chou