2023.6.17
The cold rolled steel is made from hot rolled steel with additional processing, what is it used for and what are the properties? This article will focus on cold rolled steel uses, grades, properties and the difference between cold and hot rolled steel.
Cold-rolled steel refers to a type of steel that is processed through cold rolling, which is a process of forming steel at room temperature by passing it through a series of rollers to reduce its thickness and improve its surface finish. It is essentially further processed hot-rolled steel. The cold-rolling process typically involves first heating the steel to a temperature below the melting point to improve its ductility and then passing it through a series of rollers to reduce its thickness to the desired level. The processed steel is then annealed to restore its strength and ductility and to improve its surface finish. Cold-rolled steel can be produced in a variety of grades and forms, including sheets, strips, bars, and tubes. It is widely used in a variety of applications, including automotive parts, home appliances, construction, and packaging, among others.
What is cold rolled steel used for?
– Automotive parts: Cold rolled steel is widely used in the automotive industry to make a variety of parts, including body panels, chassis components, and suspension components, among others.
– Home appliances: Cold rolled steel is used to make a variety of home appliances, including refrigerators, ovens, dishwashers, and washing machines, among others.
– Construction: Cold rolled steel is used in construction applications for everything from framing and roofing to doors and windows.
– Electrical equipment: Cold rolled steel is used to make a variety of electrical equipment, including transformers, generators, and motors.
– Packaging: Cold rolled steel is used to make containers, cans, and other packaging materials due to its strength and durability.
– Industrial machinery: Cold rolled steel is used to make a variety of industrial machinery and equipment, including conveyor systems, machine tools, and power transmission components.
– Consumer goods: Cold rolled steel is used in a variety of consumer goods, such as bicycles, furniture, and sporting equipment, thanks to its strength, durability, and versatility.
Cold Rolled Steel Properties
– High surface quality: The cold rolling process produces a smoother surface finish and tighter dimensional tolerances than hot rolled steel. This makes cold rolled steel well-suited for applications requiring a high-quality surface finish.
– Increased strength: The cold rolling process work-hardens the steel, resulting in a stronger, more durable material. Cold rolled steel is typically stronger than hot rolled steel, although it may be less ductile.
– Improved dimensional accuracy: Cold rolled steel has tighter dimensional tolerances than hot rolled steel. This makes it well-suited for applications where precise dimensions are required.
– Reduced thickness variation: Cold rolled steel has a more uniform thickness than hot rolled steel, which reduces the amount of material that needs to be removed during processing.
– Good weldability: Cold rolled steel is generally well-suited for welding, although care must be taken to ensure that the material is properly prepared and those appropriate welding techniques are used.
– Good surface hardness: Cold rolled steel typically has a higher surface hardness than hot rolled steel due to the cold working process.
– ASTM A1008: This is a low-carbon steel grade that is widely used in a variety of industrial and commercial applications, including automotive parts, construction materials, and appliances. ASTM A1008 Carbon Steel is one of the most common cold-rolled steel grades that is well-suited for a variety of industrial and domestic applications. It can be used in the manufacture of a wide range of products, including automotive components, construction materials, appliances, and furniture, among others. It is also often used in the production of pipes, tubing, and structural steel shapes.
– ASTM A366: This is a standard specification for cold-rolled commercial steel, which is typically used in products with simple bending or moderate forming requirements.
– ASTM A109: This is a standard specification for highly formable cold-rolled strip steel, which is often used in the manufacture of products that require good surface quality and ductility.
– AISI 1018: This is a commonly used low-carbon steel grade that is widely used in many different applications, including automotive parts, machinery parts, and construction materials.
– AISI 4130: This is a low-alloy steel grade that is often used in the aerospace and defense industries due to its high strength and excellent toughness.
– Dual-phase steel: This is a group of steel grades that combines low-carbon steel with a small amount of martensitic steel to create a high-strength, low-carbon alloy that is well-suited for automotive and structural applications.
1. Processing method: Cold rolled steel is processed at room temperature, while hot rolled steel is processed at a high temperature.
2. Surface finish: Cold rolled steel has a smoother surface finish than hot rolled steel due to the cold rolling process, which results in a tighter dimensional tolerance and fewer surface defects.
3. Strength: Cold rolled steel is typically stronger and harder than hot rolled steel due to the cold working process.
4. Ductility: Hot rolled steel is typically more ductile than cold rolled steel, which means it can be formed and shaped more easily.
5. Surface oxide: Hot rolled steel has a surface oxide layer that can be somewhat rough and uneven, while cold rolled steel has a cleaner, smoother surface.
6. Cost: The cost of hot rolled steel is typically lower than the cost of cold rolled steel due to the lower processing costs and quicker production time.
7. Applications: Cold rolled steel is well-suited for applications where precision and surface finish are important, such as automotive parts, home appliances, and electrical equipment. Hot rolled steel is typically used in applications where cost and general structural strength are the main considerations, such as construction and industrial equipment.