Seamless Cold Drawn Precision Tubes and Pipes

Seamless cold-drawn precision pipe is a high-precision, high-brightness seamless steel pipe material produced by cold drawing or cold rolling. The inner and outer diameters of this pipe can be accurate to within 0.2mm, ensuring its bending and torsional strength while being light in weight, so it is widely used in the manufacture of precision mechanical parts and engineering structures.
The main advantages of seamless precision steel pipes include no oxide layer on the inner and outer walls, high pressure without leakage, high precision, high finish, no deformation after cold bending, expansion, and no cracks after flattening.

Product Name	Standard	Grade	Size Range O.D. mm	Usage
Seamless Cold Drawn Precision Tubes	JIS G3445	STKM 11A, STKM 12A, STKM 12B, STKM 12C, STKM 13A, STKM 13B, STKM 13C, STKM 15A, STKM 15C, STKM 17A, STKM 17C, STKM 18A	6.00 to 88.90	Mechanical and Automobile Precision Tubes
	DIN2391	ST35, ST45, ST52	6.00 to 76.00	Seamless Precision Tubes
	ASME/ ASTM SA/A519	SAE1010,   SAE1020, SAE1025, SAE1026, SAE1035, SAE1045, SAE4130	6.00 to 340.00	Mechanical Precision Tubes
	EN10305-1	E215, E235, E335	6.00 to 340.00	Hydraulic Pressure Equipment
	ISO8535-1	ST35, ST37, ST52	6.00 to 16.00	High Precision High Pressure Fuel Pipes
Cold Drawn Welded Precision Tubes	ASTM A513	MT1010, 1015, 1020	21.70 to 90.00	Automobile Shock Absorber Cylinder, Front and Rear Axle Structural Purpose,   Director Tubes, Engine Hydraulic Tubes
	EN10305-2	E215, E235, E335	10.00 to 90.00
	DIN2393	S215, S235, S355	10.00 to 90.00
	DIN2394	S215, S235, S355	10.00 to 90.00

Cold drawn Precision Tubes (Cold Rolled Precision Tubes)
Precision Cylinder Tubes, Honed Tubes.
Size: Outside Diameter: 6mm – 340mm, Wall Thickness: 1mm – 50mm
Standard: DIN2391, DIN2394, ASTM A519, JIS G3445 STKM
Application: used for Air Cylinder and Oil Cylinder, Oil Inlet Tubes and Gas Spring Tubes on Automobile, Bushing
Tubes.
Seamless cold drawn precision tubes and pipes are widely used for machine structural purpose, automobile, and hydraulic pressure equipment.