Stress Relieving is a heat treating process that consists of heating the steel to a temperature below the critical range to relieve the residual stresses resulting from hot rolling, welding, shearing, or gas cutting. In-house stress relieving is available up to 8' wide, 20' long, and 5' high. Maybe the following will be helpful. This treatment should be performed on higher carbon material grades such as 1045 or 4140. Some of the steel stress relieving benefits are: Large and complex- as they are often prone to higher levels of stress. Carbon steels may be stress relieved by holding a temperature at 1,100 to 1,250°F (600 to 675°C) for 1 hour per inch (25 mm) of thickness. Steel Stress Relieving can be employed after a part is manufactured. Stress relieving improves the parts machinability and promotes tighter mechanical tolerances, but unlike annealing or normalizing, it does not change the steel properties. Steel Stress Relieving works by heating steel to a suitable temperature, holding it long enough to reduce the residual stress and then cooling it slowly enough to minimize new residual stresses from developing. You should have your parts stress relieved or annealed when you need to stabilize material to help achieve flatness, to soften edges to make parts more machinable, and/or to help prevent the material from cracking. Stress Relieving of a Large Steel Weldment for the Energy (Nuclear) Industry. Stress Relieving is a heat treating process that consists of heating the steel to a temperature below the critical range to relieve the residual stresses resulting from hot rolling, welding, shearing, or gas cutting. The most common means of relieving these stresses is thermal stress relief, vibration stress relief and cryogenic stress relief. 1-888-934-7463 The temperature at which stress relieving takes place is determined by the transformation temperature, which can be a different figure for various steel alloys. Copper and brass components can also be stress relieved – depending on the alloy the temperature should be 350°C for brass springs. Sub-critical annealing is used to soften the edges of higher carbon materials for machinability. In extre… At MPD Welding Grand Rapids Inc, our steel treating division, Fire-Kote, specializes in stress relieving. Our Own Steel Treating Division. For most steels, the stress relieving temperature will be around 1100-1200˚F [600 – 650˚C]. The process can be employed after a part is manufactured or during various stages of the manufacturing process. Austenitic stainless steels are stress relieved below 480°C or above 900°C, temperatures in between reducing corrosion resistance in grades that are not stabilised or low-carbon. Stress relieving steel or the stress relief heat treatment of other metals and alloys becomes an important step in the manufacturing process to provide a final quality product. For steel parts, the stress relieving temperature is normally between 350 and 500°F. The stress relieving temperature is normally between 550 and 650°C for steel parts. As the name implies, stress relieving treatment is applied to shaped articles in which the stresses are introduced during fabrication processes. Softening is done by heating in the 1050/ 1120C range, ideally followed by rapid cooling. There seems to be some confusion among shooters, and even gunsmiths, about stress relief in rifle barrels. For steel stress relief to be done properly, exact heating and cooling rates need to be used. In-house stress relieving is available up to 8' wide, 20' long, and 5' high. If necessary, stress relieving can be performed in a furnace with protective gas, to protect surfaces from oxidation. Annealing can induce ductility, soften material, relieve internal stresses, refine the structure by making it homogeneous, and improve cold working properties. As the title suggests, it reduces the residual stresses that may have been caused by hot rolling, welding, or cutting. case-hardened components, bearings, etc. Additional stress can be caused by: There are many benefits to using this process. Questions? A slow cooling speed is important to avoid tensions caused by temperature differences in the material, this is especially important when stress relieving larger components. Stress relieving can be performed by CST using one of our three car bottom furnaces, including processing under our protective atmosphere. 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