Specific uses of precision seamless steel pipes

precision seamless steel pipe, many people in the construction industry should know that it is a high-precision steel pipe material, mainly used to produce pneumatic or hydraulic components, such as cylinders or cylinders, with strong pressure resistance and lightweight, and is generally used to manufacture parts and mechanical parts. precision seamless steel pipes are mainly used to manufacture structural parts (such as shafts, bars, etc.), mechanical parts, and other industrial structural parts. the specific uses of precision seamless steel pipes and the chemical composition and heat treatment requirements of precision seamless steel pipes.

1. applications of precision seamless steel pipes
(1) precision steel pipes are widely used in the manufacture of mechanical parts, such as drill pipes, bolts, nuts, and springs;
(2) precision steel pipes are also used to manufacture various special purposes.
① bearing steel: there are bearing steel and bearing-free steel. the former is used to make machine tool guide rails, gears, spindles, etc., while the latter is mostly used to make various rollers, half-shafts, etc.
②tool steel: commonly used are alloy tool steel and carbide tool steel, such as bronze steel cones, round heads, flat heads, etc.
③spring steel: there are ordinary spring steel and linear-resistant spring steel. the former is used to make clock hands, wiring boards, etc., while the latter is mostly used as springs.
④gear steel: there are high-strength gear steel types and medium-carbon steel gear steel types. the former is usually used to manufacture gears that require high precision and high strength, such as blades of aerospace engines.
⑤welding wire: there are low alloy welding wire and galvanized welding wire. low alloy welding wire is used to make the main steel pipe and superheated steam steel pipe in the heating surface tube of a low-pressure boiler; alloy welding wire is used to make the main steam pipe and jet pipe of a high-pressure boiler. branch pipes to main water and gas steel pipes.

2. chemical composition and heat treatment requirements of precision seamless steel pipes
(1) the chemical composition of precision seamless steel pipes should comply with the requirements of gb1591-79.
(2) the carbon content in precision seamless steel pipes shall not exceed 0.10%.
(3) for certain precision seamless steel pipes for special purposes, the chemical composition should be determined according to the specific situation, and the relevant requirements or test methods should be specified. when indicating it in the standard, note: for precision seamless steel pipes for general purposes, the silicon and manganese content should be controlled between 0.55% and 0.75%.
(4) the dimensional accuracy and surface quality of precision seamless steel pipes should comply with the requirements of gb3639-83.