Hydraulic support, the implementation of standards GB/T17396-1998. Mainly used for the production of coal and hydraulic support cylinders, columns, and other hydraulic cylinders, column. Hydraulic support hydraulic support representative material for 20,45,27 SiMn. Hydraulic support tube corrosion resistance itself is not stainless steel, anti-corrosion properties of course not. But good abrasion, cutting resistance than stainless steel. Hydraulic support calculation: [(OD - Wall Thickness) * thickness] * 0.02466 = kg / m (weight per meter) alloy steel seamless steel pipe is widely used in hydraulic prop, high-pressure gas cylinders, high pressure boilers, chemical fertilizer plants, petroleum cracking half-sleeve, automotive, diesel engine, hydraulic fittings pipe. Such steel is appropriate to add one or more of alloying elements on the basis of high-quality carbon structural steel, used to improve the steel mechanical properties, toughness and hardenability. The use of such steel products, usually subject to heat treatment (normalizing or quenching); made parts and components required before use, usually after quenching or surface chemical treatment (carburizing, nitriding, etc.), surface quenching or high-frequency quenching treatment. Thus, according to the chemical composition (mainly carbon), the heat treatment process and the use of such steel roughly be divided into three kinds of carburizing, quenching and nitriding steel. This type of steel more than rolling (forging) made of round, square, flat profiles and seamless steel pipe used for the production of machinery products in the more important and larger size zero, components, and high-pressure pipeline, container, this high-quality carbon structural steel more excellent mechanical properties.