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Nov . 06, 2024 14:02 Hoʻi i ka papa inoa

What is the Difference Between

Cold rolled steel bars are steel bars processed by cold rolling technology, and their production process is relatively complex, including multiple steps such as raw material preparation, acid washing, cold rolling, annealing, and finishing. Through cold rolling process, steel bars can achieve higher strength and better surface quality. There are significant differences between cold rolled steel bars and ordinary steel bars in multiple aspects. The following is a detailed comparison of these two types of steel bars.

 

1、 Production Process of Cold Rolled Steel Bar         

 

Cold rolled steel bars:

The raw material is usually hot-rolled wire rod.

After multiple cold rolling reduction processes and possible stabilization heat treatment.

The finished product has a smooth surface and high dimensional accuracy.

Ordinary steel bars:

The raw material is generally ordinary low-carbon steel.

Mainly produced through hot rolling process, the process is relatively simple.

The surface of the finished product may have iron oxide scale and slightly lower dimensional accuracy.

 

2、 Physical Properties of Cold Rolled Steel Bar        

 

strength:

Cold rolled steel bars have higher yield strength and tensile strength, usually better than ordinary steel bars.

For example, the minimum tensile strength of CRB550 cold-rolled ribbed steel bars is 550MPa, and the yield strength is 500MPa.

The yield strength range of ordinary steel bars is usually between 335MPa and 400MPa.

Hardness and toughness:

The hardness of cold rolled steel bar  is usually high, but their toughness is also maintained well.

Ordinary steel bars have good toughness, but relatively low hardness.

Corrosion resistance:

Both may experience rusting and corrosion when in contact with water and air.

But the surface quality of cold-rolled steel bars is better, which may to some extent slow down the corrosion rate.

Both require anti-corrosion treatment to extend their service life.

 

3、 Application Scenarios of Cold Rolled Steel Bars       

 

Cold rolled steel bars:

Widely used in construction projects that require high structural strength and durability.

Such as high-rise buildings, large-span bridges, prestressed hollow slabs, etc.

Due to its high strength and good bonding and anchoring performance, it can effectively prevent cracking and steel wire slippage in the anchorage zone of the component.

Ordinary steel bars:

Applied to general construction projects and infrastructure projects.

Such as bridges, factories, hydraulic engineering, underground engineering, etc.

Mainly used as auxiliary reinforcement for concrete reinforcement such as stirrups, lap bars, and anchoring devices.

 

4、 Cold Rolled Steel Bar Prices and Costs      

 

Cold rolled steel bars:

Due to the complex production process and high strength, the price is usually higher.

However, due to its advantages of saving materials and improving structural performance, it may have better economic viability in the long run.

Ordinary steel bars:

The price is relatively low and easy to obtain.

It has a high cost-effectiveness in general construction projects.

 

I ka hōʻuluʻulu manaʻo, cold rolled steel bars and ordinary steel bars have significant differences in production processes, physical properties, application scenarios, as well as prices and costs. When selecting steel bars, reasonable choices should be made based on specific project requirements and budgets.

 

Ma ke ʻano he ʻoihana kūikawā i ka mīkini uila uila, ākea loa kā mākou ʻoihana. Aia iā mākou uwea kaulahao, ʻōwili uea, uea kila ikaika , hoʻoikaika i ka mesh , pahu huinahalike wili , ʻO ke kila pāpaʻi anu, ka pā kila, ka uea hao annealed ʻeleʻele, ka uea i uhi ʻia PVC, ka uea hexagonal, ka uea puʻupuʻu, nā pahu kila i ʻōwili ʻia, ka pā kaulahao. a weld wire mesh . ʻO ka cold rolled steel bar price i loko o kā mākou hui kūpono . Inā hoihoi ʻoe i kā mākou huahana e hoʻokipa iā mākou!

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