Galvanized sheet refers to a steel sheet coated with a layer of zinc on the surface. Galvanizing is an economical and effective anti-rust method that is often used. About half of the world's zinc production is used in this process.
effect
Galvanized steel panels are coated with a layer of metallic zinc on the surface to prevent corrosion on the surface of the steel panels and extend their service life. This zinc-coated steel panel is called a galvanized panel.
Classification
It can be divided into the following categories according to production and processing methods:
Hot-dip galvanized steel. A thin steel plate is immersed in a molten zinc bath so that a layer of zinc adheres to its surface. At present, the continuous galvanizing process is mainly used for production, that is, the rolled steel plates are continuously immersed in a plating bath containing molten zinc to make galvanized steel plates;
Alloyed galvanized steel sheet. This kind of steel plate is also made by the hot dip method, but it is heated to about 500°C immediately after coming out of the tank to form an alloy film of zinc and iron. This kind of galvanized sheet has good paint adhesion and weldability;
Electro-galvanized steel sheet. This kind of galvanized steel sheet manufactured by electroplating method has good processability. However, the coating is thin and its corrosion resistance is not as good as that of hot-dip galvanized sheets;
Single-sided and double-sided galvanized steel panels. Single-sided galvanized steel sheet is a product that is galvanized on only one side. In terms of welding, painting, anti-rust treatment, processing, etc., it has better adaptability than double-sided galvanized sheets. In order to overcome the shortcomings of one side not being coated with zinc, there is another type of galvanized sheet that is coated with a thin layer of zinc on the other side, that is, double-sided galvanized sheet;
Alloy, composite galvanized steel plate. It is made of zinc and other metals such as aluminum, lead, zinc, etc., which are alloyed or even composite plated steel plates. This kind of steel plate has both excellent anti-rust properties and good painting properties;
In addition to the above five types, there are also colored galvanized steel sheets, printed and painted galvanized steel sheets, PVC laminated galvanized steel sheets, etc. But currently the most commonly used is still hot-dip galvanized sheet.
Main manufacturing plants and import producing countries:
Major domestic manufacturers: Wuhan Iron and Steel, Anshan Iron and Steel, Baosteel Huangshi, MCC Hengtong, Shougang, Panzhihua Iron and Steel, Handan Iron and Steel, Maanshan Iron and Steel, Fujian Kaijing, etc.;
The main foreign producing countries include Japan, Germany, Russia, France, South Korea, etc.
Relevant product standards list the recommended standard thickness, length and width of galvanized sheets and their allowable deviations. Generally speaking, the thicker the galvanized sheet, the greater the allowable error, which is not a fixed 0.02-0.04 mm. The thickness deviation also has different requirements according to the yield, tensile coefficient, etc. The length and width deviation is generally 5mm. The thickness of the plate Generally between 0.4-3.2.
Appearance Editor Broadcast
Surface condition: Due to different treatment methods in the coating process, the surface conditions of galvanized sheets are also different, such as ordinary zinc flowers, fine zinc flowers, flat zinc flowers, no zinc flowers, and phosphated surfaces. German standards also specify surface levels.
Galvanized sheets should have good appearance and should not have defects that are harmful to product use, such as no plating, holes, cracks and scum, excessive plating thickness, scratches, chromic acid dirt, white rust, etc. Foreign standards are not very clear on specific appearance defects. Some specific defects should be listed in the contract when ordering.
Galvanizing amount editor broadcast
Standard value of galvanizing amount: Galvanizing amount is a commonly used and effective method to express the thickness of the zinc layer of galvanized sheets. The unit of galvanizing amount is g/m2. Japanese, American and German standards stipulate the galvanizing amount of galvanized thin steel sheets as follows.
Mechanical properties editor broadcast
Tensile test:
Performance indicators: Generally speaking, only galvanized sheets for structural use, drawing use and deep drawing use have tensile performance requirements. Among them, galvanized sheets for structural use require yield point, tensile strength and elongation, etc.; for tensile use, only elongation is required. For specific values, please refer to the relevant product standards in "8" in this section;
Test method: The same as the test method for general thin steel plates. See the relevant standards provided in "8" and the test method standards listed in "Ordinary carbon steel thin steel plates".
Bending test:
Bending test is the main item to measure the process performance of thin plates, but the requirements of various countries' standards for various galvanized sheets are not consistent. The American standards do not require bending and tensile tests except for the structural level. In Japan, bending tests are required for all products except structural grade, building corrugated panels and general corrugated panels.
Requirements: It is generally required that after the galvanized sheet is bent 180 degrees, the zinc layer must not be detached from the outer surface, and the base of the sheet must not be cracked or broken.
Chemical composition editor broadcast
The requirements for the chemical composition of galvanized sheet substrates vary from country to country. National standards generally test the content of carbon, manganese, phosphorus, sulfur, and silicon.
Packaging Editor Broadcast
It is divided into two types: galvanized sheet cut into fixed lengths and galvanized sheet packaging in coils. It is generally packed in iron sheets, lined with moisture-proof paper, and tied to a bracket with an iron waist. The bundling should be secure to prevent the galvanized sheets inside from rubbing against each other.
Foreign Standards Editor Broadcast
Product Standards
JIS G3302-94 galvanized steel plate;
JIS G3312-94 painted galvanized iron sheet;
JIS G3313-90 (96) Electro-galvanized steel sheets and steel strips; General requirements for hot-dip galvanized steel sheets;
ASTM A526-90 commercial grade hot-dip galvanized steel sheet;
ASTMA 527-90 (75) bite forming grade hot-dip galvanized steel sheet;
ASTMA528-90 deep-drawing grade hot-dip galvanized steel sheet; hot-dip galvanized steel sheet for roofing and siding;
ASTMA444-89 hot-dip galvanized steel sheet for trenches;
ASTM A446-9 3 structural grade hot-dip galvanized steel sheet;
ASTMA599-92 cold-rolled electro-galvanized steel sheet;
ASTMA642-90 hot-dip galvanized special deoxidized deep-drawing grade thin steel plate;
ΓOCT7118-78 galvanized steel plate;
DINEN10142-91 Part 1 Mild steel hot-dip galvanized steel strip and plate;
DINEN1012-92 Part 2 Hot-dip galvanized sheet steel.
Test Standard
JIS H0401-83 hot dip galvanizing test method;
DIN50952-69 hot dip galvanizing test method.
index
Galvanized sheet and strip products are mainly used in construction, light industry, automobile, agriculture, animal husbandry, fishery and commercial industries. Among them, the construction industry is mainly used to make anti-corrosion industrial and civil building roof panels, roof grilles, etc.; the light industry industry is mainly used to make home appliance casings, civil chimneys, kitchen utensils, etc.; the automotive industry is mainly used to make corrosion-resistant parts for cars, etc. ; Agriculture, animal husbandry and fishery are mainly used for grain storage and transportation, freezing processing equipment for meat and aquatic products, etc.; commerce is mainly used for material storage and transportation, packaging equipment, etc.
List of technical indicators, performance and specifications of galvanized sheets
Hot-dip galvanized steel sheet (coil) surface treatment
L chromic acid passivation
Y oil
LY Chromic acid passivation plus oiling
GZ finishing machine finishing
Surface structure
Surface Structure Characteristics Usage
Normal spangle (Z) Sprinkle caused by condensation of the zinc layer under normal conditions after galvanizing. General purpose
GZ polishing machine is used to smooth the galvanized sheet through a finishing machine to smooth out the splatter on the surface of the galvanized sheet. It is mainly used as the substrate for color-coated sheets.
Medium width galvanized sheet
Processing properties Yield strength Tensile strength Elongation % 180o Cold bending
Ordinary PV - 270-500 - d=0, intact, no dezincification Deep drawn SC - 270-380 ≥30 d=0, intact, no dezincification
Mechanical engagement JY - 270-500 - d=0, intact, no dezincification Super deep drawing SC - 270-380 ≥30 d=0, intact, no dezincification
Structure JG ≥240 ≥370 ≥18 d=0, intact, no dezincification
Market overview editor broadcast
In recent years, my country's galvanized sheet production has increased year by year, while imports have also increased year by year, and the growth rate is even higher than the increase in production volume; after deducting repeated production statistics, galvanized sheet consumption is approximately 5.27 million tons. After 1999, the import volume of galvanized sheets exceeded the production volume for the first time. The self-sufficiency rate of domestic products is less than 50% and has a trend of decreasing year by year.
(1) Current status of galvanized sheet consumption
In recent years, the increase in domestic galvanized sheet production is mainly due to the increase in hot-dip galvanized sheet production. From 1998 to 2002, hot-dip galvanized sheet production increased from 970,000 tons to 2.2 million tons; while imports grew faster, It increased from 370,000 tons in 1998 to 1.56 million tons in 2002; apparent consumption increased from 1.32 million tons to 3.67 million tons. In 2002, the domestic product self-sufficiency rate of hot-dip galvanized sheets was about 60%. The domestic production and import volume of hot-dip galvanized sheets that year both increased compared with the previous year. In particular, the import volume increased even more, mainly due to the supply of hot-dip galvanized sheets. The increased demand for thin-gauge hot-dip galvanized sheets used in the production of color-coated sheets has led to a decline in the domestic product self-sufficiency rate.
(2)Consumption status of electro-galvanized sheets
In recent years, with the rapid development of the family car market, the basic popularization of household appliances and personal computers, the large-scale export of electronic products, and the development of the security door market, the demand for electro-galvanized sheets has grown too fast. At present, the production scale of electro-galvanized sheets in my country cannot meet the demand of the domestic market, both in terms of quantity, variety and quality. From 1998 to 2002, domestic electrogalvanized sheet production increased slowly, from 170,000 tons to 400,000 tons; while imports increased rapidly, from 730,000 tons to 1.78 million tons; apparent consumption increased from 870,000 tons to 2.16 million tons. The self-sufficiency rate of domestic products is less than 20%.
Development situation editor broadcast
The increase in domestic galvanized sheet consumption is mainly driven by imports. In recent years, the import volume of galvanized sheets has increased year by year. The imported varieties are mainly electro-galvanized sheets, but the proportion of imported electro-galvanized sheets has decreased year by year. Correspondingly, the proportion of imported hot-dip galvanized sheets has increased year by year. In 2003, my country's import volume of hot-dip galvanized sheets exceeded the import volume of electro-galvanized sheets for the first time.
domestic development
Overview of the development of high-performance hot-dip galvanized sheets at home and abroad
1 Overview
At present, there is still a certain gap between my country's steel industry and the world's advanced level in terms of variety, quality, cost, service and labor productivity. In the face of increasingly fierce competition in the international and domestic markets, the pace of structural adjustment must be accelerated. This is not only the survival and development of my country's metallurgical industry. The need for development is also the development trend of the metallurgical industry in the world today. Hot Dip Galavnizing was invented in 18
Zhengde Galvanized steel plate is a thin sheet of metal coated with zinc to prevent corrosion on the surface of the steel plate and extend its service life.
Galvanized steel plates can be divided into the following categories according to production and processing methods:
Hot dip galvanized steel plate. A thin steel plate that is immersed in a molten zinc bath to adhere a layer of zinc to its surface.
Alloyed galvanized steel plate. This type of steel plate is also manufactured using the hot dip method, but immediately after being removed from the groove, it is heated to around 500 ºC to form an alloy coating of zinc and iron.
Electrogalvanized steel plate. Manufacturing this galvanized steel plate using electroplating method has good processability.
Single sided and double sided differential galvanized steel plates. Single sided galvanized steel plate refers to a product that is only galvanized on one side.
Alloy and composite galvanized steel plate. It is a steel plate made of zinc and other metals such as lead, zinc, and even composite plating.
| Hot dip galvanized and cold rolled low-carbon steel plates and strips |
commercialsnap-shaped(CQ) |
St01Z |
PT |
SGCC |
St01Z |
DX51D+Z |
CQ |
1.Suitable for manufacturing products with simple shapes; |
| St02Z |
JY |
St02Z |
LFQ |
2.It is suitable for the manufacture of mechanical snap-fit products. |
| |
|
|
(CS-A,B,C/FS-A,B) |
|
| stamping(DQ) |
St03Z |
SC |
SGCD1 |
St03Z |
DX52D+Z |
DQ |
Suitable for drawing, stamping and forming products and thickness>0.9mmrolled bite products. |
| (DDS) |
| deep drawing(DDQ) |
St04Z |
CS |
SGCD2 |
St04Z |
DX53D+Z |
DQ |
1.Suitable for manufacturing high deformation performance, deep drawn products and products with complex shapes |
| St05Z |
SGCD3 |
St05Z |
DQSK |
2.Coating thickness should generally not exceed275 g/m2 |
| |
|
|
(DDS) |
|
| Hot rolled original plate |
St01ZR |
|
SGHC |
|
|
|
|
| St02ZR |
| Structural plate |
StE280-2Z |
JG |
SGC400 |
StE280Z |
S280GD+Z |
SQ-275,340 (SS-275,340) |
It is suitable for structural products with mechanical properties and technological properties in the supply state of steel plates and steel strips. |
| StE345-2Z |
SGC440 |
StE350Z |
S350GD+Z |
| Galvanized and cold-rolled low-carbon steel plates and strips |
commercial grade |
SECC |
DX1 |
SECC |
St12ZE |
DC01ZE |
CQ |
Suitable for general purposes, can be used to make car bodies, furniture product shells, etc. |
| (CS) |
| stamping grade |
SECD |
DX2 |
SECD |
RRSt13ZE |
DC03ZE |
DQ |
It is suitable for products with molding and certain corrosion resistance requirements. |
| (DS) |
| Deep drawing |
SECE |
DX3 |
SECE |
St14ZE |
DC04ZE |
DQSK |
It is suitable for products that are difficult to form and have complex deformations. |
| DC05ZE |
(DDS) |
| Super deep drawing |
|
|
|
|
DC06ZE |
|
It is suitable for parts with extremely complex deformation, such as car boxes. |
| Structural plate |
|
DX4 |
SEFC370 |
|
|
SQ |
It is suitable for parts that require comprehensive performance and can be processed, such as purlins on buildings. |
| (SS) |
Our Advantages
WIDE APPLICATION
Generally speaking, only structural, tensile, and deep drawing galvanized sheets have tensile performance requirements. The structural galvanized sheet requires yield point, tensile strength, and elongation, etc; Only elongation is required for stretching.
Bending test is the main item to measure the process performance of thin plates, but the requirements for various galvanized sheets are not consistent in national standards. Except for structural grade, American standards do not require bending and tensile tests.
SUFFICIENT STOCK
Galvanized steel plate manufacturers have a complete range of specifications for direct sales, with a stock of 10000 tons. Various materials and standards of galvanized steel plates can also be produced according to customer requirements.
Attention to detail
Zhengde Galvanized steel plate Z-normal zinc flake: Zinc flake obtained by crystallization at normal cooling rate, can be used for general purposes: X-small zinc flake: The cooling rate is specially controlled, and the size of zinc flake is smaller than that of normal zinc flake, suitable for painting and other occasions where normal zinc flake cannot meet the requirements; GZ Finish Zinc Flower: Small zinc flowers have undergone finishing treatment and are suitable for deep drawing and ultra deep drawing processing, as well as occasions with low surface roughness requirements.
Provide deep processing
Galvanized corrugated board is a corrugated board made by rolling the surface of steel. For its standard form, there is a clear definition in the standard, that is, galvanized corrugated board is a structural board that is bent out of a series of ready-made hexagons after surface treatment by the galvanized person, has a certain bearing capacity, and can be used in buildings. Due to the lack of joints in galvanized corrugated boards, they overcome the shortcomings of traditional building structures and are easy to disassemble, move, and install.
Quality first: production and inspection in strict accordance with production standards;
Price advantage: discounts based on real market prices;
Transaction security: There will be no loss of customer funds;
After-sales guarantee: the customer's problem is our problem;
Long-term cooperation: quality assurance, price advantage, sincere service can last for a long time.
Detailed Photos
Packaging & Shipping
Company Profile
Shandong Zhengde Metal Manufacturing Co., Ltd. is a production and sales company integrating hot-rolled steel coils, cold-rolled steel coils, galvanized steel coils, color-coated steel coils, section steel, steel pipes, steel wires, metal mesh, stainless steel, aluminum, copper and other metal products integrated large enterprises. Five production and sales bases have been formed in Binzhou, Liaocheng, Wuxi, Tianjin, Jinan and Tai'an, with more than 100 production lines, 4 nationally recognized laboratories, 2 technical engineering centers, and 5 enterprise technology centers. Products are exported to more than 50 countries and regions such as North America, South America, Europe, Africa, Oceania, Middle East, and Southeast Asia.
Certifications
FAQ
1.You are a manufacturing or trading company?
---We are manufacturer. And we have years of export experience. We can ofer competitive price.
2.What quote do you offer?
---FOB&CFR&CIF and others ways according the your needs.
3. Can I have a trial order only several tons?
---Of course, We can ship the cargo for you with LCL (Less container load).
4.Can we print our own logo ?
---Yes, we can print logo for you.
5.How pay?
---T/T L/C or as you requested.
6. What is your MOQ?
---It is 3 ton each size for PPGI.
7. Do you provide samples?
---Yes. We could offer the sample by free but you should pay the freight cost
8.What is the quality of your products guarantee?
---We can offer the material testing report before the shipment.
9.Do you have after-sales service?
---Certainly. you can contact us at any time.
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