Seamless steel pipes used for auto parts. Sizes, shapes, machenical properties(tensile strength, yield, elognation) can be customized.

--Shape can be customized according to requirements
--Precise custom outer diameter and inner diameter
--Wider range of physical properties attainable through process and annealing options
--Greater consistency with better tolerances due to cold drawing
--Cost savings by greatly reducing machine-time
--Output increased with reduced scrap

ASTM A179 heat exchanger tubes A 179 Standard Specification for Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes This specification covers minimum-wall-thickness, seamless cold-drawn low-carbon steel tubes for tubular heat exchangers, condensers, and similar heat transfer apparatus. This specification covers tubes 1/8 to 3 in. [3.2 to 76.2 mm], inclusive, in outside diameter.

--Precise custom outer diameter and inner diameter
--Tight tolerances, resulting in reduced machine time / Dimensional accuracy
--Smooth and Clean OD and ID surfaces
--Excellent machining characteristics
--Wider range of physical properties attainable through process and annealing options

Quenching and tempering consists of a two-stage heat-treatment process. Stage one includes hardening, in which the steel is austenitized to approximately 900°C and then quickly cooled with water or oil. Stage two consists of tempering the material to obtain the desired material properties. Quenching and tempering achieves a fine-grained and homogeneous microstructure. Quenched and tempered steel is characterized by high strength and good ductility.

--Materials :ASTM519/1026/1035/1045 seamless steel pipe
--Inner Surface roughness is less than 0.4μm
--The Low-pressure Hydraulic cylinder can be used 20# steel pipe
--The High-pressure Hydraulic cylinder can be used 45# steel pipe
--The commonly used materials are 20#,35#，and 45# seamless steel pipe

--Precise custom outer diameter and inner diameter
--Tight tolerances, resulting in reduced machine time / Dimensional accuracy
--Smooth and Clean OD and ID surfaces
--Excellent machining characteristics
--Wider range of physical properties attainable through process and annealing options

--High precision
--Smooth and Clean OD and ID surfaces without welding joint
--Excellent machining characteristics
--Advanced manufacturing and quality processes to meet standards
--Cost savings with controlled quality