1. Corten Steel Overview
Corten steel is made of ordinary carbon steel with a small amount of corrosion-resistant elements such as copper and nickel added. Corten steel can be used in thinning, bare or simplified painting. The steel has the characteristics of rust resistance, corrosion resistance and longevity of components, thinning and consumption reduction, labor saving and energy saving, which benefit component manufacturers and users.
The alloy composition and weight percentage content of weathering steel are: C: ≤ 0.12, Si: 0.25-0.75, Mn: 0.2-0.5, S ≤ 0.02, P: 0.06-0.12, Cu: 0.25-0.5, Cr: 0.3-1.25, Ni: 0.12~0.65, the rest are Fe and trace elements. By alloying with Cu, Mn, Si, Al, etc., and simply adjusting the content of some elements of ordinary low carbon steel (Q235 steel), it is possible to produce good atmospheric corrosion resistance without changing the production process conditions of Q235 steel, economical corten steel with comprehensive mechanical properties.
2. Features of Corten Steel
(1). The weather resistance of corten steel is 2~8 times that of ordinary carbon steel; and the paintability of corten steel is 1.5~10 times that of ordinary carbon steel.
(2). Corten steel has the characteristics of rust resistance, corrosion resistance and longevity of components, thinning and consumption reduction, labor saving and energy saving.
3. The Use of Corten Steel Material
(1). Corten steel is mainly used for steel structures that are exposed to the atmosphere for a long time, such as railways, vehicles, bridges, towers, photovoltaics, and high-speed projects.
(2). Corten steel is also used to manufacture structural parts such as containers, railway vehicles, oil derricks, seaport buildings, oil production platforms and containers containing hydrogen sulfide corrosive medium in chemical and petroleum equipment.
4. Differences Between Stainless Steel and Corten Steel
(1). Corten steel is a steel bell between stainless steel and ordinary steel, and its corrosion resistance is also between the two. The principle of stainless steel anti-corrosion is to prevent the steel from rusting, and the corten steel is to let it rust to form a dense rust layer, which slows down the entry of air and water into the interior.
(2). Compared with stainless steel, corten steel has only a small amount of alloying elements, such as phosphorus, copper, chromium, nickel, molybdenum, niobium, vanadium, titanium, etc., the total amount of alloying elements is only a few percent, unlike stainless steel, which reaches 100%. Therefore, the price of the corten steel is relatively low than that of stainless steel.
5. Corten Steel Manufacturing Process
Corten steel generally adopts the process route of feeding concentrate into the furnace - 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, The scrap steel is added to the furnace together with the charge, and smelted according to the conventional process. After tapping, the deoxidizer and alloy are added. After the molten steel is treated with argon blowing, it is immediately cast. Rare earth elements are added to the steel, the Corten steel is purified, and the inclusion content is greatly reduced.
6. Practical Application of Corten Steel
1. High-performance Corten steel and refractory steel can reduce the maintenance cost of steel structures, and provide a new solution for solving fire and corrosion problems of exposed unprotected steel structures, such as high-voltage electrical towers.
2. The production and installation process of refractory and corten steel is basically the same as that of conventional steel, and the design method is also the same as that of ordinary steel structure, but more test verification is required.
3. High-strength corten steel has been popularized and applied in bridge engineering, and it is necessary to study design theories and methods
Fourth, refractory weathering steel can also be used in floor bearing panels
4. It has been widely used in railway, highway, power tower construction and so on.
5. 7. Development Prospect of Corten Steel
Corten steel, as a new generation of advanced steel materials, has atmospheric corrosion resistance 2 to 5 times that of ordinary carbon steel, and the longer the use time, the more prominent the corrosion resistance. Due to its characteristics of rust resistance, no coating, thinning and consumption reduction, labor saving and energy saving, it can be applied to steel structures exposed to the atmosphere for a long time, such as buildings, vehicles, bridges, towers, etc., and can also be used to manufacture containers, railways, etc. Vehicles, oil derricks, seaport buildings, oil platforms and other structural parts.
Corten steel has good atmospheric corrosion resistance. Although the initial investment cost of corten steel is slightly higher than that of ordinary carbon steel, compared with methods such as spraying anti-corrosion coating on the surface of ordinary carbon steel, the later maintenance cost of ordinary carbon steel is that of corten steel. Therefore, corten steel can reduce environmental pollution and belong to the key promotion technology of energy saving and emission reduction.
The national pavilion of the Grand Duchy of Luxembourg in the 2010 Shanghai World Expo, the main building of the pavilion has a rust-colored exterior, because the building material is a special steel called weathering steel. Corten steel is also called weathering steel. Its special feature is that when exposed to the natural environment, through the action of air and rain, the surface of the steel will automatically form an anti-corrosion protective layer, without the need for painting protection, the life of the material is 80 years or more. The Australia Pavilion in the 2010 Shanghai World Expo is made of red ochre-colored Weathering steel. Corten steel is 100% recyclable after the pavilion is dismantled.
8. China Suppliers of Corten Steel
HDT Co., LTD. (https://www.hdtsteel.com) is a large professional corten steel manufacturer and supplier in China. We have advanced production equipment, strong technical strength and perfect after-sales service. Our corten steel material are very high quality and can meeting international standards. Our company is well stocked and provides 24-hour online service. Custom purchase is welcome. We are here just for you and welcome your enquiry.