What is Q295gnh Weathering Steel Plate?
Weather-resistant steel is made of ordinary carbon steel with a small amount of corrosion-resistant elements such as copper and nickel. It has the characteristics of high-quality steel, such as toughness, plastic extension, forming, welding, abrasion, high temperature, and fatigue. The weather resistance is 2-2 that of ordinary carbon steel. 8 times, and the paintability is 1.5-10 times that of ordinary carbon steel, which can be used in thinner, bare or simplified coating. Q295GNH steel belongs to weldable weathering steel, which has better welding performance compared with high weathering steel.
The grade of Q295GNH steel consists of the first letter of Chinese pinyin "Q", "GNH" or "NH" of "yield strength", "high weather resistance" or "weather resistance", the lower limit of yield strength and quality grade (A, B, C , D, E) composition.
Q295NH steel should implement the standard: GB/T4171-2008.
The standard for the size, shape, weight and allowable deviation of the steel plate is: GB/T709.
Q295NH steel has the characteristics of rust resistance, anti-corrosion and prolonging the life of components, reducing thickness and reducing consumption, saving labor and energy, and benefiting component manufacturers and users. The products are used to make structural parts such as containers, railway vehicles, oil derricks, seaport buildings, and oil production platforms. Weathering steel is used in the construction of China Antarctic Great Wall Station, Shanghai Oriental Pearl TV Tower, Beijing National Grand Theater, and Luxembourg National Pavilion at Shanghai World Expo.
Weathering steel plate Production line
KUAIMA steel company has more than ten years of experience in diversified operations and multi-product transactions, involving round bar, ship plate, seamless pipe, plate, coil, wire, bright bar, pipe fittings and a wide range of carbon steel, alloy steel And more product sizes of stainless steel materials, these products we produce meet national and international quality standards, such as ASTM, ASME, DIN, JIS, ISO, etc. The company has 25 production lines for various products, with an annual output of 500,000 tons, and is committed to Provide high-quality steel products and provide supporting services and solutions for global customers. Welcome to KUAIMA steel company.
Principle of weathering steel
After adding phosphorus, copper, chromium, nickel and other trace elements into the steel, the steel surface will form a dense and highly adhesive protective film, which will prevent the corrosion from spreading and developing inward, and protect the substrate under the rust layer to slow down its corrosion rate. About 50 μ m～100 μ The m thick amorphous spinel oxide layer is dense and has good adhesion with the base metal. Because of the existence of this dense oxide film, it prevents oxygen and water in the atmosphere from infiltrating into the steel substrate, slows down the deep development of corrosion to steel materials, and greatly improves the atmospheric corrosion resistance of steel materials. Weather-resistant steel is a steel system that can be used thinly, exposed or simply coated to make products corrosion resistant, prolong life, save labor, reduce consumption, and upgrade. It is also a steel system that can be integrated into modern metallurgical new mechanisms, new technologies, and new processes to make it sustainable development and innovation.
Features of weathering steel
It refers to low alloy structural steel with protective rust layer and atmospheric corrosion resistance, which can be used to manufacture steel structures such as vehicles, bridges, towers, containers, etc. Compared with ordinary carbon steel, weathering steel has better corrosion resistance in the atmosphere. Compared with stainless steel, weathering steel has only a small amount of alloy elements, such as phosphorus, copper, chromium, nickel, molybdenum, niobium, vanadium, titanium, etc. The total amount of alloy elements only accounts for a few percent, unlike stainless steel, which accounts for more than ten percent, so the price is relatively low.
Weathering steel manufacturing process
Weather-resistant steel generally adopts the process route of refined material feeding - smelting (converter, electric furnace - microalloying treatment - argon blowing - LF refining - low superheat continuous casting (feeding rare earth wire) - controlled rolling and controlled cooling. During smelting, scrap steel is added into the furnace along with the furnace charge, which is smelted according to the conventional process. After tapping, deoxidizer and alloy are added. After argon blowing, molten steel is immediately cast. The molten steel after argon blowing and temperature regulation is cast into slab by continuous casting machine. Due to the addition of rare earth elements in the steel, the weathering steel is purified and the content of inclusions is greatly reduced.
Weathering Steel Application industry
Weathering Steel are mainly used in chemical, petrochemical, marine engineering, seawater pipelines, seawater desalination and other industries, nuclear engineering, paper and pulp industry
oil and gas
Kuaima Steel provides a complete set of equipment and installations for drilling, transportation and storage in the oil and gas industry.
energy
Kuaima Steel serves the entire service cycle of power generation and synchronous activities in design, construction, repair and maintenance.
construction
Kuaima Steel provides comprehensive products and services for infrastructure, bridges, pipelines, etc.
marine
Kuaima Steel is a trusted supplier for subsea to surface operations and shipbuilding operations.
Weathering steel plate Application industry
Weathering steel plates are mainly used in chemical, petrochemical, marine engineering, seawater pipelines, seawater desalination and other industries, nuclear engineering, paper and pulp industry
oil and gas
Kuaima Steel provides a complete set of equipment and installations for drilling, transportation and storage in the oil and gas industry.
energy
Kuaima Steel serves the entire service cycle of power generation and synchronous activities in design, construction, repair and maintenance.
construction
Kuaima Steel provides comprehensive products and services for infrastructure, bridges, pipelines, etc.
marine
Kuaima Steel is a trusted supplier for subsea to surface operations and shipbuilding operations.
We supply and export Weathering steel plate in following countries
Malaysia, United Arab Emirates, Indonesia, Saudi Arabia, Iran, Qatar, India, China, United Kingdom, Singapore, Canada, Thailand, Korea, Turkey, Philippines, Egypt, Germany, Italy, Japan, Russia, Vietnam, Australia, South Africa , Portugal, Morocco, Costa Rica, Kazakhstan, Netherlands, Mexico, Brazil, France, Spain, Nigeria, Bangladesh, Kuwait, Iraq, Ukraine, Poland, Jordan, Romania, Oman, Hong Kong, Venezuela, Colombia, Norway, Chile, Te Trinidad and Tobago, Greece, Czech Republic, Belgium, Sri Lanka, Cyprus, Angola, Myanmar (Burma), United Kingdom, Canada, Korea, Thailand, Netherlands, Spain, Turkey, Australia, Mexico, Pakistan, Vietnam, Brazil, Philippines, France, Taiwan, Poland, South Africa, Russia, Nigeria, Kuwait, Czech Republic, Norway, Romania, Egypt, Oman, Sweden, Belgium, Hong Kong, Israel, Colombia, Switzerland, Denmark, Finland, Argentina, Venezuela, Peru, Ukraine , Chile, Bangladesh, Portugal, Ireland, Austria, Algeria, Greece, Iraq, New Zealand, Slovakia, Hungary, Kazakhstan, Slovenia, Lithuania, Serbia, Sri Lanka, Bahrain, Bulgaria, Morocco, Tunisia, Croatia, Jordan, Ecuador, Te Trinidad and Tobago, Estonia, Azerbaijan, Ghana, Lebanon, Cyprus, Dominican Republic, Latvia, Libya, Costa Rica, Cambodia, Macedonia (FYROM), Belarus, Jamaica, Palestine, Turkmenistan Belarus, Jamaica, Palestine, Turkmenistan Belarus, Jamaica, Palestine, Turkmenistan and other countries
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