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Comprehensive Overview of Steel Coil Type

Steel coil is a processed steel plate. The steel is formed into a roll shape, which can facilitate various processing, storage and transportation. Steel coils are an important metal material that is widely used. With the development of modern technology, the types of steel coils are becoming more and more abundant, and different types of steel coils have their own unique characteristics, performance, applications and manufacturing processes. This article will provide a comprehensive overview of steel coil type.

1. Hot Rolled Steel Coil

Hot rolled steel coil is one of the most common types of steel coil.

Features: Usually, the color of hot-rolled steel coils delivered is black, gray or blue-black, etc., with rough surface and not very beautiful.

Performance: Its surface is covered with iron oxide scale, which has good corrosion resistance, good ductility, plasticity and toughness.

Application: Hot-rolled steel coils are mainly used in machinery manufacturing, construction, pressure vessels, construction, automobiles and other fields. They are usually used to manufacture various pipes, storage tanks, parts, boilers, etc.

Raw material: This type of steel coil usually uses slab (mainly continuous casting billet) as raw material.

Process: This steel coil type is produced through smelting, billet casting, hot rolling process, cooling, trimming, coiling and other processes, mainly by rolling the steel billet into shape at high temperature.

2.Cold Rolled Steel Coil

This steel coil type is one of the most widely used steel materials, and it is also one of the steel coil types that our Songshun Steel exports the most.

Features: Cold-rolled steel coils are usually silver-white, with a smooth, flat, clean surface, sharp edges and corners, and good aesthetics.

Performance: This steel coil has better uniformity, good anti-corrosion performance, higher surface quality and dimensional accuracy, better strength and hardness, excellent plasticity, toughness and weldability, etc.

Application: This steel coil type is used in fields with high precision requirements such as automobiles, home appliances, mechanical parts, household product manufacturing, and ships.

Raw material: Hot-rolled coils are used as raw materials, and are rolled after cooling at room temperature.

Process: It is usually produced by the cold rolling process. The cold rolling process has high technical requirements and needs to be carried out strictly, otherwise it will easily lead to deformation of the steel. It is also manufactured using processes such as pickling and rust removal, annealing, and finishing.

3. Galvanized Steel Coil

The galvanized steel coil type is one of the most widely available steel products on the market.

Features: The surface of the steel coil is plated with a layer of zinc. The surface is smooth, usually showing a bright silvery white color, and has good aesthetics.

Performance: This type of steel coil usually has excellent corrosion resistance, is not easily oxidized, has good processing properties, high plasticity, strength, hardness and weldability, etc.

Application: Galvanized steel coils are widely used in the manufacture of automobile parts, roofs, solar brackets, structural parts, transportation facilities, home appliance casings, pipes, building materials, electrical components, body panels, etc.

Process: This steel coil type uses a galvanizing process, including hot-dip galvanizing and electro-galvanizing. The hot-dip galvanizing process resists corrosion without the need for additional protective coatings, but the electrolytically deposited galvanizing process cannot be used in corrosion-resistant applications.

Material: usually made of carbon steel.

4.Color Coated Steel Coil

This steel coil type is available on the market in a variety of different color patterns and with special surface treatments.

Features: The surface of the color-coated steel coil is coated with a layer of color paint, which presents rich colors, smooth surface, and good aesthetics.

Performance: This type of steel has better strength, weather resistance, load-bearing capacity, fire resistance, durability, decorative and anti-corrosion properties, etc.

Application: This type of steel coil is often used in construction, decoration, home furnishing, home appliances, transportation and other fields.

Process: Color-coated steel coils are colored coatings that are formed by pre-treatment on the surface of cold-rolled, hot-rolled or galvanized steel sheets, followed by multiple coatings and drying.

Material and coating: The steel coil can be made of a variety of materials, including cold-rolled plates, hot-rolled plates, galvanized plates, aluminum-zinc-manganese steel plates, etc. The coatings of color-coated steel coils mainly include polyester, silicon-modified polyester, polyurethane, etc. Different coatings have different properties.

5. Stainless Steel Coil

The stainless steel coil type is a finished coil made of stainless steel plates.

Features: The stainless steel coil has a smooth surface, excellent quality, good brightness and no oxide scale, etc.

Performance: It has better corrosion resistance than other steel coil types. It also has high tensile strength and fatigue resistance, high dimensional accuracy, pure steel, good high-temperature oxidation resistance, good toughness and plasticity, etc. 

Application: Stainless steel coils are widely used in food processing, chemical industry, medical equipment, construction, petroleum, machinery manufacturing, furniture manufacturing and other fields.

Process: The steel can be hot-rolled or cold-rolled, but the mechanical properties of hot-rolled stainless steel coils are usually not as good as cold-rolled.

Material: Stainless steel coil products have complete specifications and various materials. The main materials are 304, 304L, 316, 316L, 301, 201, 202 and other stainless steel.

6.Alloy Steel Coil

This type of steel coil is one of the common materials added with alloy elements, and it is also one of the most purchased steel coils by customers from our Songshun Steel.

Features: The surface of alloy steel coils has a high smoothness, is relatively uniform, and has no obvious defects.

Performance: It has high strength, toughness, corrosion resistance, etc., and also has good wear resistance, processing performance, high temperature and high pressure resistance, etc.

Application: This steel coil type is mainly used in the manufacturing of equipment, tools and parts in the electric power, automobile, aerospace, petrochemical, construction, energy and other industries.

Process: The steel coil usually adopts hot rolling or cold rolling process, and the surface process includes pickling, coating, polishing, etc.

Material: This type of steel coil is made of various alloy steel materials. Common alloy steel coils include 4130, 4140, 42CrMo, 4340, etc.

In addition to the above types of steel coils, there are also silicon steel coils, electrical steel coils, composite steel coils, etc. In short, there are many types of steel coils, and different types of steel coils have their own characteristics, performance, applications, processes, etc. Therefore, choosing the appropriate of steel coil type can meet your various needs for steel coil, effectively utilize its performance, and play its best role.

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