42CrMo steel (approximately US grade AISI-4140) belongs to low-alloy medium carbon steel and also belongs to ultra-high-strength steel.
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Due to its high impact strength and low elongation, 4130 Cr-Mo steel is widely used in sports equipment such as aircraft samples, racing car frames, anti-roll frames, dune bums, bicycles and motorcycles.
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Low alloy piping materials are often called chrome moly materials because of the chemical makeup of Molybdenum (Mo) and Chromium (Cr).
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Seamless steel pipes are perforated from whole round steel, and steel pipes without welds on the surface are called seamless steel pipes.
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Alloy steel is a steel that has small amounts of one or more elements (in addition to carbon) such as manganese, silicon, nickel, copper, chromium and molybdenum in addition.
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Cold Drawn Seamless (CDS) seamless tube and pipe is produced by piercing hot billets and subsequent rolling which reduces their diameter and elongates them.
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The performance of alloy pipe is much higher than that of general seamless steel pipe, because this steel pipe contains more Cr, and its high temperature resistance, low temperature resistance, corrosion resistance is not comparable to other seamless steel pipes, so alloy pipe is widely used in petroleum, chemical, electric power, boiler and other industries.
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In both the manufacturing methods, raw steel is first cast into a more workable starting form (hot billet or flat strip). It is then made into a pipe by stretching the hot steel billet out into a seamless pipe or forcing the edges of flat steel strip together and sealing them with a weld.
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Many equipment will have high temperature after long-term operation, and if you do not use a finned heat exchanger to dissipate heat, some of the performance of the equipment will be affected, so the quality of the finned heat exchanger can determine the efficiency and life of the equipment.
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The spiral fin tube is very efficient in heat exchange, and the heat dissipation area is very large
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Finned radiators are indispensable heating equipment in today's family life, and many families choose to use this radiator for a better living experience.
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Because the string tube is to string the fins to the tube piece by piece, because the tube is often not round (especially welded steel pipe), there will inevitably be a gap between the fin and the tube wall. If there is a gap, there is a gap thermal resistance, so the following close connection measures are often used.
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