prepainted steel coil JIS G 3312

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Product Description:

PREPAINTED STEEL COIL

Packaging & Delivery

Packaging Detail: seaworthy export package

Delivery Detail: on request

Specifications

1.     more than 10 years’ experience on this field

2.  advanced equipments

3.  competitive price

4.  soonest delivery

                     Product Description :

Commodity

PREPAINTED STEEL COIL

Technical Standard: JIS 3312

GradeCGCC

Types:Commercial / Drawing / Deep Drawing / Structural quality

Width: 900mm/1000mm/1219mm/1200mm/1220mm/1250mm

Thickness: 0.2mm~4.0mm

Type of coating: galvanized

Zinc coating: Z40-275g/m2,Z40-Z450g/m2

ID coil: 508mm or 610mm

Coil weight: 3-10/MT per coil

Package:Properly packed for ocean freight exportation in 20''container

Application::home appliances, constructions, building, machineries

Our Advantages :

1. Expertise:
 
More than 10 years of manufacture: we know how to properly handle every step of production.
2. Competitive price:
We can offer competitive prices to our customers.
3. Accuracy:
We have excellent technicians and leaders, which can ensure our products are exactly what you want.
4. Materials:
All galvanized steel coils are made of high-quality raw materials.
5.
Certificate:
Our products are certified by ISO9001.
6. Productivity:

We have large-scales of production lines,, which can guarantee all your orders will    be finished in earliest time.

Hr CGL Technical Process:

Coil loading-> uncoiling-> cutting-> welding-> entry accumulator-> Heating and deoxidization-> galvanizing-> air cooling->water quenching-> air dryer-> tension leveler-> Passivation->air dryer->exit accumulator-> oiling-> cutting-> recoiling->coil unloading-> packing

The furnace heating style: improved Sendzimir heating technology

Hourly output: max.76.3t/h

Process after coating: tension leveling, Passivation or oiling

Our Service

Our quality

Test Equipments of Prepainted Galvanized Steel Coil : Salt-spray tester; Atomic absorption spectrophotometer; Rockwell typer hardness tester; Tensile test machine; Metrohm titration; Laboratory Bend test machine.

Our packing

Properly packed for ocean freight exportation in 20''container, galvanized metal fluted rings on inner and outer edges, galvanized metal & waterproof paper wall protection disk, galvanized metal & waterproof paper around circumference.

R&D department

R&D department concentrates on researching and developing reliable products with best quality. The quality department test and control every process of production to guarantee the best quality of product


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Q:What is the hardness of cold rolled steel strip?
Generally, the Rockwell hardness of annealed carbon steel is 55+-3, and the hardness of annealed cold rolled strip is above 80
Q:What are the categories of strip steel? How do you distinguish it?
Classification by usageAccording to the use of steel, can be divided into structural steel, tool steel, special performance steel three major categories.Structural steel: 1. used as steel for various machine parts. It includes carburizing steel, Quenched and tempered steel, spring steel and rolling bearing steel.2. steel used as an engineering structure. It consists of carbon steel in armour, B, especially steel and ordinary low alloy steel.Tool steel: steel used to make all kinds of tools. According to the use of different tools can be divided into tool steel, die steel and tool steel.Special performance steel: steel with special physical and chemical properties. Can be divided into stainless steel, heat-resistant steel, wear-resistant steel, magnetic steel and so on.
Q:Specification and use of cold rolled strip
Advantages of cold rolled strip:A very thin strip of steel (0.001mm), which is difficult to obtain by hot rolling method, can be obtained;It can make the product have high mechanical properties and wide range of performance;Guarantee to obtain the high precision size, the thickness deviation is small, along the strip width and the length aspect uniformity, the shape is good, the surface is bright and clean each kind of strip steel;Low cost and high efficiency;Rolling speed, with high productivity.Technological characteristics of cold rolled strip:When the strip is rolled in cold condition, because of the hardening of the strip, the intermediate annealing must be done to soften it and restore the plasticity so as to continue rolling;The surface iron oxide scales must be removed before rolling, thus ensuring the surface smoothness of the strip and reducing the wear of the roll;Adopting tension rolling to ensure good strip shape of strip, controlling the deviation of strip thickness and reducing rolling pressure, which is beneficial to rolling thin specification products.Using process cooling and lubrication, it is easy to control the temperature of roller and strip, reduce the friction between roll and strip, and reduce the rolling pressure. It is favorable to shape control and prevent the sticking roll of strip steel.
Q:Why is strip heat cheap?
Mainly the production process is not the same.
Q:Is there any difference between galvanized steel strip and galvanized sheet?
Galvanized steel strip, in narrow sense, refers to strips of steel.
Q:The degreasing time is too long, will the strip surface be oxidized?
Galvanized steel plate in spray, generally do phosphating treatment, the parameters of free acid phosphating solution should be kept low, and high temperature, acid, zinc ions reduced excessive reaction, resulting in coarse crystallization. Reference: Fa:0.8-1.5 Ta:17-28 acid ratio of about 25, the temperature can be 35-45 degrees.
Q:What is the difference between steel strip and coil?
The strip and the coil is the main raw material for the production of welded steel pipe, the steel pipe manufacturing is mainly manufacturing process for spiral welded pipe used for steel roll uncoiling, leveling, trimming, molding, welding, welded pipe must be used for sheet forming and welding, if the steel roll uncoiling leveling must also be cut into leaflets the use of steel plate. Coil generally refers to the strip width not less than 600mm, can generally be divided into Kaiping steel plate or longitudinal strip, standard and plate together, such as: carbon and low alloy structural steel plates and strips. Strip width is generally less than 600mm.
Q:The relation between hot rolled strip and cold rolled coil, hot rolled strip and cold rolled strip
Hot rolled strip: hot rolled strip, also known as hot rolled strip, commonly known as hot plate. Hot rolled strip with width less than or equal to 600mm, steel plate of thickness 0.35-200mm and steel strip of 1.2-25mm thickness. The strength of hot rolled steel plate surface quality is relatively low, almost (oxidation low smoothness), but good plasticity, general plate, cold-rolled plate, high strength, high hardness, high surface smoothness, generally can be used as a punching sheet, plate.Cold rolled strip: cold rolled strip and sheet, general thickness of 0.1 ~ 3mm, width of 100 ~ 2000mm, all with hot rolled strip or steel plate as raw material, at room temperature by cold rolling rolling
Q:Causes of zinc removal in hot rolled strip
The base plate is coated with an iron oxide layer, which proves that the substrate in the annealing furnace has not been completely reduced to the spongy pure iron required for galvanizing.
Q:What is the difference between strip steel and silicon steel?
Silicon steel is a silicon iron alloy with silicon content of about 3%~5% and other major iron. Divided into oriented silicon steel and non oriented silicon steel, it is an important soft magnetic alloy in electric power, electronics and military industry. Silicon steel refers to a low carbon silicon iron alloy with silicon content ranging from 0.5% to 4.5%. It is divided into non oriented silicon steel and oriented silicon steel because of its different structures and uses. Silicon steel is mainly used as the core of various motors, generators, compressors, motors and transformers. It is an indispensable raw material for electric power, household appliances and other industries.

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