Cold Rolled Galvanized Steel

Cold rolled galvanized steel is a high-quality metal material with high precision, excellent mechanical properties, and superior anti-corrosion properties. It has a wide range of application prospects in many fields, such as the construction industry, automobile industry, home appliance industry, and so on. There are many cold rolled steel coil suppliers all over the world. Please make sure to choose a reputable one, for example, Wanzhi Steel. As a leading steel products manufacturer in China, we have our own factory in Shandong Province. We develop a professional team to produce CR steel coil with precise dimensions, beautiful surfaces, and good mechanical properties. Besides, there is a strict quality control system.

What is cold rolled galvanized steel?

Cold-rolled galvanized steel is a type of steel that is rolled at room temperature and then galvanized. It combines the high precision of cold rolled steel with the corrosion resistance of galvanized steel, making it a high-quality metal material with a wide range of applications in various fields.

What is cold rolled steel?

Cold Rolled Galvanized Steel (Cold Rolled Steel) is an important metal material that combines the high precision of cold rolled steel with the corrosion resistance of galvanized steel, and has a wide range of applications.

Cold Rolled Steel Definition

Cold rolled and hot rolled processes are two methods of forming steel products. Cold rolled products have a higher degree of dimensional accuracy and are better suited for applications where high dimensions are required. Cold rolling occurs below the crystallization temperature and is controlled by different types of rolls. The basic products are cold rolled sheets and coils, which can also be formed into other shapes such as cylinders, I-beams, and tubes.

How does cold rolled galvanized steel made?

There are two main steps involved, which are as follows:

1. Cold Rolling

Plasticizing steel by rolling, drawing, extruding, etc. at room temperature to obtain the desired shape, size, and properties of the steel. During the cold rolling process, the steel is rolled in several passes and annealed to eliminate work hardening.

2. Galvanizing

The cold rolled steel is immersed in a molten zinc solution to form a zinc coating on the steel surface. This zinc coating significantly improves the corrosion resistance of the steel.

Cold rolled galvanized steel features

High precision: cold rolled galvanized steel has high dimensional accuracy and surface quality, which can meet the requirements of high-precision processing.

Excellent mechanical properties: cold rolled galvanized steel has high strength and hardness while maintaining good plasticity and toughness. This makes it able to withstand large loads without breaking easily.

Excellent anti-corrosion properties: the galvanized layer can effectively prevent the steel from being corroded and extend the service life of the steel. Especially in humid and corrosive environments, the anti-corrosion performance of cold rolled galvanized steel is more prominent.

Difference between galvanized steel and cold rolled steel

Strength Comparison

The base material for galvanized steel products can be cold rolled steel or hot rolled steel. Usually, the yield strength of hot rolled steel is higher than that of cold rolled steel because the cold rolling process destroys the grain structure of the steel, while hot rolling improves the grain structure. However, in terms of surface aesthetics, cold rolled steel is superior to hot rolled steel.

Processing method

Cold rolling and galvanizing are two different processes with different purposes, one for forming and one for corrosion protection. We can galvanize cold rolled steel to become galvanized cold rolled steel. Cold rolled steel can be used at high temperature, while galvanized steel is relatively slightly inferior performance at high temperature, when its zinc layer is scratched, the zinc layer at the scratch will lose its protective effect. Cold rolled steel that has been galvanized will get superior performance.

Cold rolled galvanized steel application

Construction industry: Commonly used to make roofing, walling, and other building components. Its excellent anti-corrosion properties and high strength make the building components more durable and safer.

Automotive industry: It is used to make key components such as car bodies and chassis. These components need to withstand large loads and impacts, and the high strength and toughness of cold rolled galvanized steel can meet these requirements.

Home appliance industry: such as the shell and internal structure of refrigerators and washing machines. Its excellent surface quality and anti-corrosion properties make home appliances more beautiful and durable.

Other fields: it is also widely used in transportation, petrochemical, machinery manufacturing, and other fields.

What is the difference between cold rolled galvanized sheet and hot rolled galvanized sheet?

In the regular production of galvanized sheet, cold rolled substrate galvanized mainly, hot rolled substrates are relatively rare, then hot rolled sheets and cold rolled sheet galvanized products in the end what is the difference? We do a simple explanation from the following aspects:

1. Cost

The cost of hot rolled steel is relatively low because there is less than one process than the cold rolled sheet. With the advancement of technology, specifications, and thicknesses are getting bigger and bigger, and the dosage is gradually increasing.

2. Quality performance

Hot rolled substrate only after pickling and annealing cleaning, the surface is relatively rough, the zinc layer adhesion is better, and the coating thickness is not as high as cold rolled sheet. Because most of the thick zinc layer, the zinc layer thickness control is not uniform. Mechanical properties do not differ much, and some properties are even better than cold rolled.

3. Application

Cold rolled galvanized sheet of dimensional accuracy and surface quality is usually due to the hot-rolled galvanized sheet, hot-rolled galvanized sheet thickness is thicker than cold-rolled galvanized sheet. Commonly used in the surface requirements are not high but the strength and thickness requirements of high structural components, such as cold-formed steel and so on.

4. Grades

Common grades dd51d+Z, hd340lad+Z, hr340la, hr420la, hr550la, etc.; Dc51d+Z, hc340lad+Z, hc340la, hc420la, hc550la, etc. for hot rolled galvanized sheet.

There is also a brand that does not specify whether it is a cold-rolled or hot-rolled substrate, such as dx51d + Z, which can generally be regarded as hot-rolled galvanized sheet.

Cold Rolled Galvanized Steel Precautions

When using or producing cold rolled galvanized steel, you need to pay attention to the following points:

Storage environment

Cold rolled galvanized steel should be stored in a dry, ventilated, non-corrosive environment, avoiding contact with moisture, oil and other harmful substances.

Processing

When processing and handling cold rolled galvanized steel, care needs to be taken to avoid scratches and deformation. At the same time, appropriate processing methods and process parameters should be selected according to specific application scenarios.

Quality testing

Before use, quality testing should be carried out. This includes the thickness, uniformity, adhesion of the zinc layer and the mechanical properties of the steel. Ensure that the quality of the steel meets the standard.

Cold Rolled Galvanized Steel For sale – Wanzhi Steel

Wanzhi Steel offers thickness from 0.5 mm to 3 mm and the width ranges from 600 mm to 1,250 mm cold rolled gi sheet. The standard zinc layer is Z275g/m³. Standard export packaging, with quality assurance and fair price, as well as other additional processing services.  Also, the third-party inspection is acceptable. More than that, we have a full-service system. If you have any problem when receiving goods, please feel free to contact us. We will get back to you in 12 hours. If you are interested, welcome to consult our online professional and technical staff.