Weathering steels, such as ASTM A588, A242, A606 and COR-TEN® exhibit superior corrosion resistance over regular carbon steel as a result of the development of a protective oxide film on the metals surface which slows down further corrosion. COR-TEN® steel is the preferred choice of roll formed product end-users. Western States Metal Roofing will always provide a mill certification at time of shipment when required. We have colors and finishes that nobody else has with nearly 100 different colors in stock. Why? Typical applications for ASTM A847 HSS tube are bridges, hand rails, and any other applications where high-strength low-alloy (HSLA) and superior corrosion resistance steel is required. ASTM A847-HSS-Hollow Structural Steel is a cold-formed high strength-low alloy steel that is welded and shaped into square tube, rectangular tube and pipe. Corten A has added phosphorous, which makes it suitable for aesthetic facias and gas flue applications, while Corten B is better suited for heavy and load-bearing structures. A588 is a high strength low alloy plate used for structural applications such as buildings and bridges. Hot-rolled steel is weaker than cold-rolled, but it’s also cheaper since … Standard hot roll will rust, just not the same as weathering steel. Bare Cold rolled steel is used as a less expensive option to A606 Type 4 ( Commonly referred to as Corten ). Since the deposit of the welded area is not the same material as A606-4, the weld will take a bit longer to rust. At first glance this may seem like a lot of extra money. When A606-4 dry’s from the moisture the “natural rust” will begin to set into the steel. Request A Quote . If you have a typical 30 SQ roof that equates to $ 1,000 to $ 1,500 additional for your project. will cost an additional thirty to fifty cents per square foot when compared to. Always make sure to follow proper safety and lifting protocols when manually handling material. If you have a typical 30 SQ roof that equates to $ 1,000 to $ 1,500 additional for your project. If you get the orange color-then most likely you got Weathering Steel, but we would recommend you get a mill certification just to be sure. Welding A606-4 or A588 to other metals can lead to a dissimilar metal reaction. Buy Direct From Manufacturer â Homeowners Welcome, Corten and Bare Cold Rolled Steel Shipped Inexpensively and Immediately. If the answer is " No " or " I don't know " it's almost certainly NOT COR-TEN®. We advise using the above flux combinations and using your local welding supply company for welding materials. It is my personal opinion that the aesthetics of both are similar enough that it should not be much of a factor when making this choice. There are a couple of ways to make sure you received “the real” weathering steel aka Corten. . Home Owners Welcome. Yes, the same alloys are used in all weathering steel products when they are produced at the mill. It can be shipped anywhere in the country very inexpensively on one of our route trucks. Our selection of color options and finishes is likely the largest in the industry. Corten contains copper, chromium, manganese, and nickel which makes this material more expensive. Weathering steel is a group of steel alloys developed to obviate the need for painting, and form a stable rust-like appearance if exposed to the weather for several years. Both A588 and A606-4 are weathering steel specifications and have similar chemical compositions that meet the ASTM G101 of 6.0 or higher on the atmospheric corrosion-resistance index. Corten will last longer and would be more desirable in harsh climates. You can weld weathering steel using the same flux combinations so that the tensile strength of the deposited weld metal (welding rod or wire) is consistent with the tensile strength of the base metal (weathering steel). The result is a protective oxide film on the metal’s surface which slows down future corrosion. We recommend you check with your local paint supplier and get their recommendation as they are the coating experts. There is no specific timeline on how long the “full” patina finish will take to develop. Bare steel tends to rust a little more orange and Corten tends to rust to a cinnamon brown color. One of the most common problems is using a light gauge steel. The two main factors to consider is lifespan and price. ©2013 - 2020 Western States Metal Roofing, all rights reserved. Corten will have a longer life-span than bare cold rolled steel. Contact an expert in underlayment for further details. A588 is available in steel plate and starts at 3/16” thickness and increases up to 5” thickness. If you do it prior to a good rust/patina, then it is very likely your clear coat will take off the rust. I would personally only use A606-4 on my roof. Many projects using bare cold rolled and Corten products were installed in excess of forty years ago and there are no problems. Download all of Our Catalogs Click on Image Below . He has been in the metal roofing industry for 25 years. Metal Roofing & Siding Panels. There is no definitive answer to this question. Its unique look and naturally oxidizing finish make it especially desirable for many architectural projects. hbspt.cta._relativeUrls=true;hbspt.cta.load(6069238, 'ebb57800-8904-4e23-9e59-302a4e6f6643', {}); hbspt.cta._relativeUrls=true;hbspt.cta.load(6069238, 'ff7c70c2-6a3f-472d-8353-8a6fde001655', {}); Paul Rubio is the Vice President and one of the owners of Western States Metal Roofing. Subscribe to receive updates from Western States Metal Roofing! When A606-4 gets wet the orange-brown oxide finish will develop. A606-4 steel is available in metal roofing/siding panels, standing seam panels, flat sheets, and coil form. Since most individuals do not have the proper equipment to load/unload/process coils-we typically recommend flat sheets. Carbon steel in the general use of the term would mean standard structural steel shapes like channel, angle, square, etc. Please note, there isn't a specific welding wire for ASTM A847 HSS tube and pipe. Both products have a similar appearance. If you choose to clear coat the material, do it after the A606-4/A588 has a good rust/patina set into the steel. A606-4 develops the patina faster when it can go through wet and dry cycles. Once the A606-4 oxidizes with the weld it will blend together in a nice orange-brown oxide finish. This low amount of carbon allows it to remain ductile and tough. It is recommended to use a high temperature underlayment. Corten Roofing vs. Bare Cold Rolled Roofing. Download Catalog . Pre-Painted Metal That Looks Orange/Brown Rusted, Painted To Look Like Galvanized With Orange Or White Rust Spots, Pre-Painted Metal That Looks Patina'd Copper, Pre-Painted Metal That Looks Weathered Gray, Dark Colored Matte Finishes & Dark Bronzes, Pre-Painted Metal That Looks Like Patinaâd Copper, Pre-Painted Metal That Looks Like Blackened Steel, Matte Finishes, Blacks, Bronzes, and Grays. One is to get a mill certification from your supplier at the time of shipment. No, COR-TEN® is not available. Would you spend 20K on a roof that would give you a 40 year lifespan in the correct conditions or would you spend 18.5K-19K on that same roof and get about half the lifespan ? There are multiple factors when it comes to getting the orange-brown oxide finish. Weathering steel also includes other alloying elements that help to increase the strength, but more importantly, the corrosion resistance. Corten vs Bare Steel: Which is Better for My Rusted Roof? It depends on the environment and the way in which it was installed. ©2013 - 2019 Western States Metal Roofing, all rights reserved. If somebody tells you that they are supplying you COR-TEN® they are almost certainly unaware of their own product. Corten roofing will cost an additional thirty to fifty cents per square foot when compared to bare cold rolled roofing. Request A Sample . If you're not familiar, here's what makes this material special: It has a beautiful and natural… Simply ask them if their steel was purchased from U.S. Steel. Its unique look and naturally oxidizing finish make it especially desirable for many architectural projects. These shapes are typically far more a Route Trucks Servicing all of the U.S.A. AND Canada. The pipe can be used in fence applications, artistic structures and many other applications where you desire strength in the steel, longevity and visually pleasing. We do not have a specific recommendation on clear coatings. Pre-Painted Metal That Looks Orange/Brown Rusted, Painted To Look Like Galvanized With Orange Or White Rust Spots, Pre-Painted Metal That Looks Patina'd Copper, Pre-Painted Metal That Looks Weathered Gray, Dark Colored Matte Finishes & Dark Bronzes, Pre-Painted Metal That Looks Like Patina’d Copper, Pre-Painted Metal That Looks Like Blackened Steel, Matte Finishes, Blacks, Bronzes, and Grays. Corten and Bare Cold Rolled Steel Shipped Inexpensively and Immediately. The other is the visual test. Yes, you can weld ASTM A847 HSS Tube or Pipe. We do not sell underlayment. The market term ‘cold rolled’ refers to all steel that is formed when it’s cold (at room temperature). Standard carbon steel will rust but it will not have the beautiful colors that come from A606-4. The difference in our products is: A606-4 is considered weathering steel sheet with thicknesses beginning at 22 Gauge and thicker available up to 3/16”. Some modular corten steel products (like fire pits) may already … We stock A606-4 in flat sheets, coil, and panels. Bare Cold Rolled is widely manufactured for a variety of different purposes including metal roofing … Copper, manganese, silicon and nickel are just a few of the alloys used. Those factors are the environment, moisture, weather, and humidity. Then they will begin to rust. This alloy mix creates a beautiful rust (patina) when exposed to the elements of nature. Customers often ask us about the differences between hot rolled steel and cold rolled steel.There are some fundamental differences between these two types of metal.The differences between hot rolled steel and cold rolled steel relates to the way these metals are processed at the mill, and not the product specification or grade. Corten resists the corrosive effects of rain, snow, ice, fog, and other meteorological conditions by forming a coating of dark brown oxidation over the metal, which inhibits deeper penetration and negates the need for painting and costly rust-prevention maintenance over the years. ASTM A847 HSS tube and pipe has copper & manganese that creates a beautiful orange rust patina. It takes time to develop the patina. Make sure you are getting what you paid for. Any Size Order. Additionally, the copper along with manganese, silicon and nickel content in A606-4 creates that protective layer as the material continues to patina. The visual test is to look for the orange color when the material patinas. If you need it to develop faster there are some natural solutions that when applied over and over will assist you in developing that beautiful patina. If you are looking for Corten Steel (also known as weathering steel) tube or pipe it is not available. Buy Direct From Manufacturer. When someone needs COR-TEN® they are normally referring to A606 Type 4 or A588. If the price looks too good than there is likely a reason why. It can also be used in your landscape and architectural applications where no future maintenance of material is required. However, when you look at the FINISHED cost of your roof including underlayment, fasteners, trim, and labor it actually is a very modest increase in cost.
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