The materials used for color coating coils are cold-rolled substrates, hot-dip galvanized substrates, electro-galvanized substrates, and galvanized substrates. In addition, it is a color-coated steel strip using hot-dip galvanized steel strip as the base material. In addition to the protection of the zinc layer, the organic coating on the zinc layer plays a covering and protective role to prevent the steel strip from rusting, and its service life is longer than that of the galvanized strip. long, about 1.5 times. With its many advantages above, color-coated coils are widely used in various industries such as construction, home appliances, automobiles, furniture and light industrial products.
Color Coated Galvanized Ppgi Steel Coil
Ral color, can be customized according to customer needs
Zero Spangle,Regular Spangle,Small Spangle
as per customer's requirements
The interrelation between cold rolling and hot rolling
Hot rolling is made of slab (mainly continuous casting billet) as raw material and made of strip by roughing mill and finishing mill group after heating. From finishing the last hot steel strip mill out through laminar flow cooling to the set temperature, which consists of the winder coil, steel coil after cooling, according to the different needs of users, with different finishing line (flat, straightening, transverse or longitudinal cutting, inspection, weighing, packaging and logo, etc.) and become a steel plate, flat roll and longitudinal cutting steel strip products. To put it simply, a slab of steel is heated (like the red, hot block you see on TV) and then subjected to several rounds of rolling, cutting and straightening to form a sheet of steel. This is called hot rolling.
Cold rolling: using hot rolled steel coil as raw material, after removing the oxide scale by pickling cold rolling, the finished product is rolled hard coil, due to cold hardening caused by continuous cold deformation, the strength and hardness of rolled hard coil increases, the toughness and plastic index decreases, so the stamping performance will deteriorate, can only be used for simple deformation of parts. Hard roll can be used as raw material for hot-dip galvanizing plant, because hot-dip galvanizing unit is set with quenching line. The hard roll weight is generally 6~13.5 tons. The steel roll is continuously rolled on the hot pickling roll at normal temperature. The inner diameter is 610mm.
Product features: Because there is no annealing treatment, its hardness is very high (HRB > 90), the mechanical performance is very poor, can only carry out simple directional bending less than 90 degrees (perpendicular to the direction of coiling).
To put it simply, cold rolling is processed and rolled out on the basis of hot rolled plate rolls. Generally speaking, it is hot rolling - pickling - cold rolling such a process.
Cold rolling is made of hot rolled plate at room temperature, although the steel plate will be heated by rolling during the process, but it is still called cold rolling. Due to the cold rolling after continuous cold rolling, the mechanical properties are poor and the hardness is too high. Must undergo annealing to restore its mechanical properties, no annealing is called rolling hard coil. Rolled hard coil is generally used to do without bending, stretching products, thickness 1.0 or less rolled hard on both or four sides of the lucky bending.
1. Cold rolling is made of hot rolled plate at normal temperature
2. A slab of steel is heated (like the red, hot block you see on TV) and then subjected to several rounds of rolling, cutting and straightening to form a steel plate. This is called hot rolling.
Hot rolled sheet has low hardness, easy processing and good ductility.
Cold rolled sheet hardness is high, processing is relatively difficult, but not easy to deformation, high strength.
Hot rolled plate strength is relatively low, surface quality almost (oxidation, low finish), but good plasticity, generally medium thick plate, cold rolled plate: high strength, high hardness, high surface finish, generally thin plate, can be used as stamping plate.
Hot rolled steel plate, mechanical properties are far inferior to cold processing, also inferior to forging processing, but has better toughness and ductility
Cold rolled steel plate due to a certain degree of work hardening, low toughness, but can achieve a good flexural ratio, used for cold bending spring pieces and other parts, at the same time because the yield point is closer to the tensile strength, so the use of danger is not predictive, when the load exceeds the allowable load is prone to accidents
Supplement, cold rolled steel plate 0.3-3.0mm, hot rolled steel plate 2.0-
How to judge steel coil material
Ordinary according to the amount of carbon C difference, low carbon steel, high carbon steel, the most commonly used is 45 steel. All with the letter C, C45, middle carbon... Other letters are based on the content of the elements, general letters represent elements, numbers represent percentage content, low carbon boiling steel, generally can be replaced by 10 steel.
08F features and scope of application:
It has low strength, soft steel, good plasticity and toughness. General use does not require heat treatment, but in order to eliminate the internal force caused by cold processing and improve the cutting performance of steel, heat treatment can be carried out, cold processing can increase the strength. It is often used to manufacture stamping parts and carburizing parts, such as stamping products, sleeves, enamel products, car shell and so on.
1 Chemical composition:
Carbon C: 0.05 ~ 0.11
Silicon Si: ≤ 0.03
Mn: 0.25 ~ 0.50
Sulfur S: ≤ 0.035
P: ≤ 0.035
Cr: ≤ 0.10
Nickel Ni: ≤ 0.25
Cu: ≤ 0.25
2 Mechanical properties:
Tensile strength σ B (MPa) : ≥295 (30)
Yield strength σ S (MPa) : ≥175 (18)
Elongation δ5 (%) : ≥35
Easy cutting steel products are widely used in: machinery and equipment: woodworking machinery, ceramic machinery, papermaking machinery, glass machinery, food machinery, construction machinery, plastic machinery, textile machinery, jacks, hydraulic press, etc.;
Electrical components: motor shaft, fan shaft, sewing machine shaft, etc.
Q:What is your terms of payment?
A:We usually accept T/T in advance, L/C for large sum.If you prefer other payments terms, please discuss.
Q:What is the terms of delivery?
A:EXW, FOB, CIF
Q:What is the terms of packing?
A:Generally, we pack our goods in bundles or coils with rods or belts, we could also pack the goods as the customers' requirements.
Q:What is your delivery time?
A:For products in stock, we can ship it within 7 days after receiving the deposit.For custom order, production time is 15-30
workdays after received the deposit.
Q:Could you produce according to the samples?
A:Yes, we could customer-made by your samples or technique drawings, we could build the mold and fixtures.
Q:Can I place an sample order and what is your MOQ if I accept your quality?
A:Yes, we can send you samples but you may pay the express fees, our MOQ is 1 ton.
Q:How could you guarantee your products?
A:We accept and support the third-party inspection.We also could issue the warranty to customer to guarantee the quality.
Q:Where is the port of shipment?
A:Ningbo or Shanghai sea port.
Q:How can I get the price of needed product?
A:It's the best way if you can send us the material, size and surface, so we can produce for u to check the quality.If you
still have any confusion, just contact us, we would like to be helpful.