High Quality China 0.4mm Cold Rolled Coil for Construction, Automobile Manufacturing

• After-sales Service: Contact Supplier
• Standard: ASTM, JIS, GB, AISI, DIN, BS
• Certification: ISO
• Surface Treatment: Polished
• Technique: Cold Rolled
• Application: Ship Plate
• Model NO.: SPCC,SPCD,SPCE, DC01,DC02,DC03,ST12,ST13,ST14
• Edge: Slit edge
• Stock: Stock
• Transport Package: Sea Worth Packing
• Specification: 0.15mm-2mm
• Trademark: zunkai
• Origin: China
• HS Code: 7411219000
• Production Capacity: 50000tons/Month

Product Description

Product Description

 

what is cold rolled coil

Cold-formed steel is a general term for steels formed by cold working processes such as rolling, pressing, stamping, bending, etc. at temperatures near room temperature. Bars and plates of cold-rolled steel are commonly used in all areas of manufacturing. This term is the opposite of hot formed steel and hot rolled steel. Cold-formed steel, especially in the form of thin-gauge steel, is commonly used in the construction industry for structural or non-structural items such as columns, beams, joists, studs, floor trim, building profiles, and other components.
Cold rolled steel is hot rolled steel that has undergone additional processing to improve its dimensional and mechanical properties. During the cold rolling process, cooled hot rolled steel passes through another series of rollers at room temperature. Since the material is no longer hot and malleable, a significantly higher amount of pressure is required to compress it into the desired shape. While this process can be more labor-intensive and expensive than the hot rolling process, it can achieve tighter dimensional tolerances and better surface qualities.

Benefits of Cold Rolled Steel

Compared to hot rolled steel, cold rolled steel offers a variety of advantages, such as:

• 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.

 

Detailed Photos

 

COLD-ROLLED STEEL

As you might suspect, the manufacturing process behind cold-rolled steel is a bit different. Despite the name, this process refers to steel that is pressed with the pressure of a roller at room temperature.

Compared to hot-rolled steel, cold-rolled steel has a nearly 20% increase in strength through the use of strain hardening. It's through a series of breakdown, semi-finishing, sizing, semi-roughing, roughing, and finishing that cold-rolled steel shapes can be created.

Cold-rolling steel allows for the creation of very precise shapes. Since the process is performed at room temperature, the steel will not shrink as it cools, as it does in the hot-rolled process.

The exterior finish of cold-rolled steel is very desirable when aesthetics and visual appeal are a priority in your project.

However, the applications of cold-rolled steel are somewhat limited to a couple of shapes - square, round, flat, and variations thereof.

Product Parameters

UNIQUE PROPERTIES OF COLD ROLLED STEEL

Cold Rolled Steel, often abbreviated as CR or CRS, is known for being extremely ductile. Additionally, it is formable for moderate draw applications, as well as being non-shrinking and non-creeping at ambient temperatures. 

Most often, you'll find details about Cold Rolled Steel as it compares to Hot Rolled Steel. Here are a few of the key differences between the two products: 

• Strength - Cold Rolled Steel can exhibit up to 20% greater strength than Hot Rolled Steel, making it more suitable for high-stress applications. 
• Precision - Cold Rolled Steel does not shrink after the forming process, allowing for the creation of precise components that require little to no secondary processing.
• Surface - Cold Rolled Steel generally has a smoother and shinier surface, free of rust and scale. 

Structural Grades	C	Mn	P	S	Al	Si	Cu	Ni	Cr	Mo	V	Cb	Ti	N
30,33,36,40	0.25	0.9	0.035	0.04			0.2	0.2	0.15	0.06	0.008	0.008	0.025
36T2,45-80	0.25	1.35	0.035	0.04			0.2	0.2	0.15	0.06	0.008	0.008	0.025
45T2	.02- 0.08	.30- 1.0	.03- .07	0.025	.02- .08	0.6	0.2	0.2	0.15	0.06	0.008	0.008	0.025	.01- .03

HSLA Grades	C	Mn	P	S	Al	Si	Cu	Ni	Cr	Mo	V	Cb	Ti	N
45C1	0.22	1.35	0.04	0.04			0.2	0.2	0.15	0.06	0.005	0.005	0.005
45C2	0.15	1.35	0.04	0.04			0.2	0.2	0.15	0.06	0.005	0.005	0.005
50C1	0.23	1.35	0.04	0.04			0.2	0.2	0.15	0.06	0.005	0.005	0.005
50C2 & 55C2	0.15	1.35	0.04	0.04			0.2	0.2	0.15	0.06	0.005	0.005	0.005
55C1	0.25	1.35	0.04	0.04			0.2	0.2	0.15	0.06	0.005	0.005	0.005
60C1 & 65C1	0.26	1.5	0.04	0.04			0.2	0.2	0.15	0.06	0.005	0.005	0.005
60C2 & 65C2	0.15	1.5	0.04	0.04			0.2	0.2	0.15	0.06	0.005	0.005	0.005
70C1	0.26	1.65	0.04	0.04			0.2	0.2	0.15	0.16	0.005	0.005	0.005
70C2	0.15	1.65	0.04	0.04			0.2	0.2	0.15	0.16	0.005	0.005	0.005

Common Grades	C	Mn	P	S	Al	Si	Cu	Ni	Cr	Mo	V	Cb	Ti	N
CSA	0.1	0.6	0.03	0.035			0.2	0.2	0.15	0.06	0.008	0.008	0.025
CSB	0.02-.15	0.6	0.03	0.035			0.2	0.2	0.15	0.06	0.008	0.008	0.025
CSC	0.08	0.6	0.1	0.035			0.2	0.2	0.15	0.06	0.008	0.008	0.025
BH	0.012	1.5	0.12	0.03			0.2	0.2	0.15	0.06	0.008	0.008	0.025
FSA	0.1	0.5	0.02	0.035			0.2	0.2	0.15	0.06	0.008	0.008	0.025
FSB	0.02-.15	0.5	0.02	0.03			0.2	0.2	0.15	0.06	0.008	0.008	0.025
DDS	0.06	0.5	0.02	0.025	.01		0.2	0.2	0.15	0.06	0.008	0.008	0.025
EDDS	0.02	0.4	0.02	0.02	.01*		0.2	0.2	0.15	0.06	0.1	0.1	0.15

Application

 

 

Applications for Cold Rolled Steel

 

Steel is strengthened by cold rolling. Contrary to hot rolling, the process of cold rolling can only be performed when the temperature of a specific metal lies below its recrystallization temperature. Cold rolling is conducted at an ambient temperature, unlike hot rolling, which uses elevated temperatures. As a result, metal may undergo structural change, due to the high-stress applications in a mechanical manner, without the need to apply heat. Besides, the metal's strength can be enhanced by up to 20% as a result of strain hardening, also ensuring the enhancement of a metal's surface quality.

Precision manufacturing is possible while creating a cold rolled stainless steel coil, which yields the production of a metal exhibiting exceptionally stiff cross-sectional tolerances. Cold rolling the stainless-steel material can achieve different degrees of hardness during the finishing process. Three major distinctions of hard stocks exist in the market: quarter, half, and full. This leads to the trade-off between the yield point and the steel's ductility requirements. The more the yield point, the less the ductility measurements. The cold rolling process is used in moderate draw applications with high uniform ductility requirements. Also, in situations when the metal needs to be bent without the threat of breaking, cold-rolled metal is utilized.

Applications for Cold Rolled Steel

There are many applications of cold-rolled steel products. Some of them are discussed below.

Construction

 

Construction and development are two vital industrial buildings where cold-rolled steel types are used in huge quantities. This high usage of construction materials is due to the importance of steel in making a structure resistant to diverse environmental conditions. Cold-rolled steels are also used for framing in the construction industry. You will often see this in commercial buildings as the main structural component. The strength of cold-formed steel elements is superior to that of other metal frame materials while being lighter than those materials. This makes it a very popular material for buildings. Hotels, dorms, and other multi-story buildings are constructed using cold-rolled frames. Cold-formed steel design has tighter dimensional tolerances and a high tensile strength, which allows less quantity of components to be needed but still has the strength we need to get the job done. Bolts and screws for metal sheeting rails are made from cold rolled steel. It is used in the application for floors and other building elements.

While construction is one of the largest users of cold roll steel, there are other applications that you will find this material has become a big part of. Let's take a look at those.

Home appliances

Cold-rolled steel has a variety of uses, including its widespread usage in home appliances. The application of cold-rolled steel can be found even in the smallest gadget used in homes. Various appliances use cold rolled steel, such as water heaters, washers, dryers, and PCs. Cold-rolled steel has tighter tolerances than other metals, so it is commonly used in household appliances. 

Cold-formed steel structures are preferred for home appliances because of their outstanding tensile and yield strengths. There are several home applications that contain cold-formed steel members, such as refrigerators, washers, dryers, and lawnmowers. In addition, you can find this material in computers and other home applications such as shelving and decor. When looking at cold-formed steel members, the one thing you will find in common is the very smooth surface with excellent design standards. The hot rolling process doesn't yield this type of steel with a smooth finish, making it less desirable for certain applications. Cold-rolled steel is easily decorated with paint and different coatings to protect it against erosion. 

 

Packaging & Shipping

 

Certifications

 

FAQ

 

Q1 : What is your payment terms?
A1 : 30% deposit & balance against B/L or L/C at sight.

Q2 : What is your delivery time & loading port?
A2 : Generally it is within 7 days after received advance payment or L/C. If the goods is not in stock , according to the quantity
it is within 15 days. Loading port:QINGDAO or TIANJIN.

Q3 : Do you have MOQ request ? Can offer free samples?
A3 : Our MOQ is usually ONE ton. Free samples is ok but need pay thecourier charge. Charge can be deduct in future orders.

Q4 : What are your company's main products?
A4 : Our main products are Aluminum products, Steel products, Stainless steel products, Galvanized steel products, Colorized steel Coil, etc.

Q5 : Are you a factory or trading company?
A5 : We have both factory and trading company,own branch factory and warehouse in Shandong Province to provide you nice
goods with best price and good quality.