Compared with austenitic stainless steel, the weakness of the duplex stainless steel is as follows:1) application of universality and multifaceted than austenitic stainless steel, such as its temperature must be controlled below 250 degrees Celsius.2) the plastic toughness was lower than those of austenitic stainless steel, cold and hot working process and mechanical properties than austenitic stainless steel.3) exist in the brittleness temperature zone, heat treatment and welding process system, must be strictly controlled in order to avoid the occurrence of harmful phase, damage performance. Compared with the ferritic stainless steel, the advantage of duplex stainless steel is as follows:1) comprehensive mechanical properties are better than ferritic stainless steel, plastic toughness, in particular, is not sensitive to brittle like ferritic stainless steel.2) in addition to the stress corrosion resistance, other local corrosion resistance are better than ferritic stainless steel.3) cold working technology and cold forming performance is far better than that of ferritic stainless steel.4) also far better than that of ferritic stainless steel welding performance, generally do not need to preheat before welding and without heat treatment after welding.5) application scope than ferritic stainless steel wide.
Methods of Cutting Large Diameter Seamless Steel Pipes
Large diameter seamless steel pipe is over 1000MM, which is made from steel ingot or solid tube, and then processed by hot rolling or cold rolling. Sometimes, the seamless carbon steel pipe is longer or short while using. Short seamless steel pipes can be welded, longer seamless steel pipes can be cut off. Here are three methods of cutting large diameter seamless steel pipes to proper length to meet industry needs.
1. By saw machine Saw machine can make neat section which is convenient for welding. The disadvantage is low efficiency.
2. By gas cutting Though gas cutting is fast, the disadvantage is presented notched surface which is not good for construction.
3. By cnc cutting machineBy cnc cutting machine, seamless steel pipes manufacturers will not save a lot cost but also can obtain smooth section of seamless steel pipe which has not much difference from cutting by saw machine.
If you are looking for a new range of strong and durable pipes, you have come at the right and one of the popular seamless steel pipe manufacturers. Hunan Great Steel is certified and reputed manufacturer and supplier of seamless steel pipes and a variety of other pipes and tubes for various industrial applications. These pipes are of premium quality and made by following all the quality and safety guidelines. We deliver them worldwide at wholesale prices. Our prices are reasonable and will be lower than others. Manufacturer’s warranty is an added advantage that will ensure that you are getting the best quality at competitive prices. We have these pipes in different measurements that you can choose according to your choice. Please go through our selection of available seamless steel pipes and welded steel pipe and place your order.
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