Product introduction of Shandong Lu Hua Iron and Steel Co., Ltd.

Hard coil plate: available specifications: 0. 12 mm- 1.2 mm (thickness) 9 14mm- 1500mm (width) 1. Product definition: At room temperature, hot-rolled pickling plate is continuously rolled on a continuous unit. 2. Product features: Due to the cold working hardening caused by continuous cold deformation, the strength and hardness of the rolled hard coil increase, and the toughness and plasticity index decrease, so the stamping performance will become worse, and it can only be used for parts with simple deformation. Because all hot dip galvanizing units are equipped with annealing units, hot rolled steel coils can be used as raw materials for hot dip galvanizing units. Generally, the weight of hard-rolled steel coil is 6- 13.5 tons, and the inner diameter of steel coil is 508mm or 610 mm. Generally, continuous annealing (CAPL unit) or bell furnace annealing should be adopted for cold-rolled steel coil to eliminate cold-working hardening and rolling stress, so as to achieve the mechanical properties specified in the corresponding standards. After the steel plates are bundled, the weight of each package is 3-5 tons, and the equal weight is generally 3- 10 ton/roll. 3. Product use: The surface quality, appearance and dimensional accuracy of cold-rolled steel plate are better than those of hot-rolled steel plate, and its product thickness is reduced to about 0. 18mm, so it is favored by users. Cold-rolled steel coil is used as damping composite steel plate and PVC laminated steel plate, which makes these products have beautiful appearance and high corrosion resistance, and has been widely used. After annealing, the cold-rolled coil must be finished, including cutting head, tail, trimming, leveling, flattening, rewinding or longitudinal shearing. Cold-rolled products are widely used in automobile manufacturing, household appliances, instrument switches, construction, office furniture and other industries. 4. Main manufacturers: Shanghai Baosteel, Beijing Shougang, Liaoning Bengang, Changshu Kehong, Shandong Jigang and Shandong Laigang.

-color coated board: available specifications: 0. 165mm-0.8mm (thickness) 1000mm- 1200mm (width) 1. Product definition: Cold-rolled strip and galvanized strip (electro-galvanized and hot-galvanized) are used as substrates on continuous devices after surface pretreatment. Because the coating can have various colors, it is customary to call the coated steel plate color coated steel plate. Because painting is carried out before the steel plate forming process, it is also called pre-coated steel plate abroad. The process flow is as follows: color coated steel plate is a product made of cold-rolled steel plate and galvanized steel plate as base materials, after surface pretreatment (degreasing, cleaning and chemical conversion treatment), continuous coating (roller coating method), baking and cooling. The main production process of the common two-coating and two-drying continuous color coating unit is: uncoiling → pretreatment → coating → baking → post-treatment → coiling. 2. Product features: the coated steel plate has light weight, beautiful appearance, good corrosion resistance and can be directly processed. It provides new raw materials for construction industry, shipbuilding industry, vehicle manufacturing industry, furniture industry and electrical appliance industry. It has played a good role in replacing wood with steel, efficient construction, energy saving and pollution prevention. The color-coated steel plate based on galvanized steel plate is protected by zinc, and the organic coating on the zinc layer plays the role of covering and isolating, which can prevent the steel plate from rusting and has a longer service life than galvanized steel plate. It is reported that the service life of coated steel plate is 50% longer than that of galvanized steel plate. However, in different areas, different parts of use, the same amount of zinc plating, the same paint, the same coating thickness, the service life of color-coated plates will be very different. For example, in industrial areas or coastal areas, due to the action of sulfur dioxide gas or salt in the air, the corrosion rate is accelerated and the service life is affected. In rainy season, if the paint is soaked in rain for a long time, or in the part where the temperature difference between day and night is too large and it is easy to condense, it will be corroded quickly and its service life will be reduced. Buildings or workshops made of colored coated steel plates have a long service life when they are often washed away by rain. Therefore, when designing, the greater the inclination of the roof, the less likely it is to accumulate dust and other dirt, and the longer the service life; For those areas or parts that are not often washed by rain, they should be washed with water regularly. 3. Uses of color-coated steel plates: building (outdoor) workshops, agricultural warehouses, prefabricated residential components, corrugated roofs, household appliances, etc. 4. Main manufacturers: Fujian Jing Kai, Tangshan Hengtong, Taiwan Province Shangxing, Shandong Jigang, Shandong Jingbo, Hebei Guanzhou and Hebei Sinosteel.

-galvanized sheet: available specifications: 0. 12 mm- 1.2 mm (thickness) 1000mm- 1500mm (width) 1. Product definition: the annealed cold-rolled hard steel plate is acid-washed to remove the oxide on the surface, and then the product is treated with zinc chloride and zinc chloride. 2. Product features: Its surface structure is divided into normal zinc flower (Z), small zinc flower (X) and smooth zinc flower (GZ). The surface of galvanized steel plate has fish-scale or leaf-like zinc crystal patterns, and the galvanized layer is firm, with excellent corrosion resistance, good weldability and cold working formability. According to the production and processing methods, it can be divided into the following categories: ① Hot-dip galvanized steel plate. Immerse the steel plate in molten zinc bath to make a layer of zinc adhere to the surface of the thin steel plate. It is mainly produced by continuous galvanizing process, that is, the rolled steel plate is continuously immersed in zinc bath to make galvanized steel plate; ② Galvanized steel plate. The galvanized steel sheet manufactured by electroplating method has good processability. However, the coating is thin and the corrosion resistance is not as good as that of hot dip galvanized sheet; ③ Single-sided galvanized and double-sided differential thickness galvanized steel plates. Single-sided galvanized steel plate, that is, a product that is galvanized only on one side. It has better adaptability than double-sided galvanized sheet in welding, painting, antirust treatment and processing. In order to overcome the disadvantage of not coating zinc on one side, there is another kind of galvanized sheet with thin zinc on the other side, that is, double-sided differential galvanized sheet; (4) Alloy, composite galvanized steel plate, which is made of zinc and other metals such as lead and zinc. This steel plate not only has excellent antirust performance, but also has good painting performance. In addition to the above four kinds, there are colored galvanized steel plates, printed galvanized steel plates and PVC laminated galvanized steel plates. But at present, the most commonly used is hot-dip galvanized sheet. 3. Product use: galvanized steel sheet can be divided into general use, roof use, building external board use, structural use, corrugated board use, stretching use and deep drawing use. 4. Main manufacturers: Shanghai Baosteel, Beijing Shougang, Changshu Kehong, Tangshan Hengtong, Guangdong Hanjiang and Tianjin Yiyuan.

-Galvanized aluminum plate: Available specifications: 0.2 mm- 1.2 mm (thickness) 800mm- 1250mm (width) 1. Product definition: The base material of galvanized aluminum sheet consists of 55% aluminum, 43.5% zinc and 1.5% silicon. 2, product features: extraordinary weather resistance, use for more than 20 years without maintenance. The test results of early products of roof/wall system show that the main performance of galvanized aluminum sheet is intact under the action of decades of strong solar radiation, exposure, industrial waste erosion and temperature stress, and no maintenance is needed. More than 500 million square meters of engineering examples around the world make galvanized aluminum plate favored by more architects and owners, and its excellent corrosion resistance is the reason why this roof/wall system is widely used. The research shows that this kind of roofing system is expected to reach the service life of more than 30 years or even longer in most cases, and there is no need for major maintenance. -Clean standing plate: It is a new generation of aluminum-zinc coated color steel plate successfully developed by BHP. Its outstanding performance, which is different from other color steel plates, lies in its high durability, extraordinary dustproof ability and low maintenance cost. This product is suitable for roofs and walls of buildings. The performance of substrate conforms to AS 1397, and the performance of coating conforms to the third part of AS 2728. Mainly used for the exterior of buildings, such as walls, roofs and drainage systems; Other uses include garage doors and interior decorative panels.