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20CrMo alloy steel tube is a medium carbon chromium-molybdenum alloy steel according to the American standard (AISI/SAE 4140), corresponding to the Chinese grade 42CrMo, Japanese standard SCM440, and European standard 42CrMo4. Its chemical composition mainly includes elements such as carbon, silicon, manganese, chromium, and molybdenum. After quenching and tempering heat treatment, this material exhibits high strength, high hardenability, good toughness, and minimal quenching deformation, and is widely used in the manufacture of automotive transmission shafts, gears, aerospace structural components, petroleum drilling tools, and various high-strength mechanical parts.
4140 alloy steel pipis also widely used in the manufacturing of key components in various industrial fields such as the automotive industry, machinery manufacturing, oil and gas, aerospace, defense, energy and power, agriculture, and mining. Specifically, it includes automotive transmission shafts, crankshafts, gears, main shafts, bolts, shafts, and fixtures in machinery manufacturing, drill collars, pipelines, wellhead equipment, and drilling tools in the oil and gas industry, landing gears and structural components of aerospace vehicles, gun barrels and receivers in the defense field, turbine components and generator shafts in power generation equipment, as well as tractor shafts, plowshare, and drill bits in agricultural machinery and mining equipment.
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