Product Details

DIN1630 ST37.4 ST44.4 ST52.4 Honed carbon steel pipe

Product Description

1.Hydraulic cylinder tube

The hydraulic cylinder tube is the main part of the hydraulic cylinder.The inner
hole of the hydraulic cylinder tube usually precision processed by boring,reaming,rolling

or honing.By these process can ensure the piston,sealing elements and the support
elements move smoothly,then ensure the sealing effect and reduce the abrasion.The
hydraulic cylinder tube will bear big pressure,so need high strength and stiffness.

2.Hydraulic Tube Material
JIS STKM13C, DIN ST52, SAE1020 or Mechanical Construction Use Carbon Steel Pipes,

Other Specifications Can be made Customer Request based on.

Steel Grade	Chemical composition %
	C	Si	Mn	P	S	Al
				≤		≥
20#	0.17-0.24	0.17-0.37	0.35-0.65	0.035	0.035	/
45#	0.42-0.50	0.17-0.37	0.50-0.80	0.035	0.035	/
Q345B	≤0.2	≤0.5	1.00-1.60	0.03	0.03	/
Q345D	≤0.2	≤0.5	1.00-1.60	0.03	0.03	0.015
25Mn	0.22-0.29	0.17-0.37	0.70-1.00	0.035	0.035	/
27SiMn	0.24-0.32	1.10-1.40	1.10-1.40	0.035	0.035	/
ST52	≤0.22	≤0.55	≤1.6	0.025	0.025	/
SAE1026	0.22-0.28	0.15-0.35	0.60-0.90	0.04	0.05

Processing	Cylinder Diameter	Straightness	Size Accuracy	W.T/mm	Inner Bore Roughess
Cold drawn/cold rolled	ID30-250	0.3	H9-H11	±10%	0.4~1.6um
Honed tube	ID50-250	0.3	H7-H9	±10%	<0.4um