Cold Rolled Steel

Your Professional Cold Rolled Steel Supplier

Our goal is to become your true partner in the field of cold rolled steel in China. Gnee Steel Group is committed to becoming the world's most internationally competitive supply chain group, meeting the different needs of different customers. We have a skilled engineering team dedicated to refining every stage, from product development and process improvement to production oversight, ensuring every product delivered meets rigorous quality and performance standards. The price is competitive and the product is quality-assured, which is a good choice for your long-term cooperation.

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Why Choose Us

Our services:

In the pre-sales stage, our team of experts will recommend the most suitable products according to the needs of customers and provide detailed technical consultation. During the sales period, we ensure timely delivery and provide installation guidance. For after-sales, we provide long-term technical support, warranty services and spare parts to help customers maximize the use of products and get reliable maintenance during use.

Our certification:

Our company has obtained SGS certification. We have also passed ISO9001 and ISO14001 environmental management system certification.

Our capacity:

We have established long-term cooperative relationships with dozens of factories to ensure the production of our products, and our annual export volume exceeds 80,000 tons.

Quality control:

All our products are made of the highest quality materials and are subject to factory inspection, cargo inspection at any time.

Advantages of Cold Rolled Steel

Greater strength:

Cold rolled steel can exhibit strength up to 20% greater than that of hot rolled steel, which makes it more suitable for use in high-stress applications.

Better surface finishes:

Parts and products made from cold rolled steel generally have a smooth and shiny surface that is free of rust and scale.

Higher precision:

Unlike hot rolled steel, cold rolled steel does not shrink after the forming process. This quality allows for the creation of highly precise components that require little to no secondary processing.

Specification of Cold Rolled Steel

Product Name	Cold rolled plate/ cold rolled sheet
Grade	SS400, ASTM A36, A572,ST37,ST52, Q195, Q215, Q235,Q345, Q460, Q609,S235JR, S355JR
Standard	JIS, AISI, ASTM, DIN, TUV,BV,SUSG3101,GB/T700-2006,etc
Thickness	0.12mm-60mm or as required
Length	1000-12000mm or as required
Width	600mm-1250mm or as required

Cold Rolled Steel Properties

One of the most important properties is the high strength. The cold-rolling process increases the strength of the steel by 20%. It is preferred in mechanical applications as it is highly resistant to denting.

Furthermore, it also has high formability which makes it ideal even if you need to bend the steel sheet to a certain shape such as a bracket, u-channel, or z-channel. Also, it has excellent magnetic properties too. It makes it a preferred alloy for a wide range of industrial and domestic applications.

Enameling and color-coding cold rolled steel is possible. In fact, it is recommended as steel will corrode over time. By putting a protective layer of paint coating on it, the life of the metal will be increased to a great extent.

Application of Cold Rolled Steel

01/

Construction parts: In the construction industry, cold rolled steel is commonly used for manufacturing beams, columns, built-up sections, floor decking, and other essential metal components.

02/

Production machinery: Cold rolled steel is tested and proven to be potentially strengthened by up to 20%. In addition, cold rolling offers high stamping performance, excellent mechanical properties, and low yield strength.

03/

Metal furniture and home appliances: Due to its mechanical stress procedure, cold rolled steel displays a smooth and sturdy surface. It can also be rolled thinner by up to 50%, which makes it ideal for metal furniture and home appliances manufacturing. It does not only guarantee you longer service life, but it also offers a more visually appealing and aesthetic appearance.

04/

Automotive industry: Steel is a common part of the automotive industry. Cold rolled steel, in particular, is more commonly used over hot rolled steel due to its wear-resistant and shockproof qualities.

05/

Manufacturing industry: In the manufacturing industry, cold rolled steel is also a widely used steel material. Below are the following common cold rolled products:

06/

Other uses: The uses of cold rolled steel are not limited to the above. It can also be used in many other applications

Chemical Composition of Cold Rolled Steel

Element	Percentage
Fe	99.31 - 99.7
Mn	0.3 - 0.5
S	0.05 max
P	0.4 max

The Manufacturing Process Of Cold Rolled Steel

01.

Cold rolling:

The thickness accuracy of the cold rolled product is decided by this process. Computer control is employed for the controlling method.

02.

Cleaning:

Rolling oil on the cold rolled strip is burned off throughout this method which is next to cold rolling as mentioned above.

03.

Skin pass rolling:

Treated coils are gently rolled by the skin pass mill to prevent a defect referred to as stretcher strain to enhance strip shape and regulate mechanical properties.

04.

Finishing:

After skin pass rolling, coils are processed at the recoiling line, where they are cut to manufacture product coils.

Key Differences Between Hot Rolled Steel and Cold Rolled Steel

Surface quality:

Hot rolled steel tends to have rough edges and surfaces that require decarburization or other treatments to prepare it for use in subsequent production operations. In contrast, cold rolled steel generally has a shiny and smooth surface that allows it to be used as-is in production operations.

Material hardness:

The cold rolling process produces steel with much higher strength and hardness than the steel produced by the hot rolling process.

Internal stress:

The greater material strength and hardness introduced by the cold rolling process comes with greater internal stresses. These stresses must be relieved before the material can be processed; otherwise, the final part or product may experience warping.

Packing and Shipping of Cold Rolled Steel

Packing	Standard export packing (inside:water proof paper,outside:steel covered with strips and pallets)
Shipping	Shipped by road, sea, rail

Other Service of Cold Rolled Steel

Delivery time	7 to 25 working days after the receipt of 30% deposit
Payment terms	30%TT for deposit, 70% balance before shipment or LC at sight
Supply ablitity	10000 Ton/ per Month

FAQ

Q: What is cold rolled steel?

A: Cold rolled steel is essentially hot rolled steel that has been further processed by being allowed to cool at room temperature and annealed or temper rolled. Cold rolling produces steel with closer dimensional tolerances and a wider range of surface finishes than hot rolling.

Q: Is cold rolled steel stronger than regular steel?

A: In terms of physical characteristics, cold rolled steels are typically harder and stronger than standard hot rolled steels. As the metal is shaped at the lower temperatures, the steel's hardness, resistance against tension breaking, and resistance against deformation are all increased due to work hardening.

Q: Is cold rolled steel the same as 1018?

A: As the most common (or at least one of them) cold-rolled steels in the world, 1018 is classed as a free-machining steel grade, meaning that small chips form when it's machined. This is a good thing as it makes it easier to work with and manipulate into whatever shape you need.

Q: What is another name for cold rolled steel?

A: Cold-formed steel (CFS) is the common term for steel products shaped by cold-working processes carried out near room temperature, such as rolling, pressing, stamping, bending, etc. Stock bars and sheets of cold-rolled steel (CRS) are commonly used in all areas of manufacturing.

Q: Can cold rolled steel be welded?

A: Yes, cold-rolled steel can be welded, and it's often preferred for welding applications due to its precise dimensions and cleaner surface, requiring less post-welding finishing.

Q: Can you machine cold rolled steel?

A: Machinability grades that are initially cold rolled to a pre-shape can offer better tool life, asset utilization, and performance in the machining process for our customers due to the increase in hardness and tensile strength that comes from cold rolling steel.

Q: Is cold-rolled steel hard to bend?

A: Because cold-rolled steel is less malleable at its natural temperature, there can be limitations to the available shapes of this product.

Gnee Steel (Tianjin) Co., Ltd. is one of the most professional cold rolled steel manufacturers and suppliers in China, specialized in providing high quality products and service. We warmly welcome you to wholesale cold rolled steel at competitive price from our factory. Contact us for customized service.