High Precision ST45 ST52 SAE1045 27SiMn Seamless Honed Tube for Hydraulic Cylinder

Short Description:

Honed tube is usually a CDS (Cold drawn seamless) steel tube or DOM (Drawn Over Mandrel) steel tube with inside diameter honed or skived &roller burnished, so honed tubing is with extremely precise ID dimensions and smoothly ID surface.

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Product Introduction

Honed tubes are broadly utilized to produce and repair hydraulic cylinders and pneumatic cylinders. So in many fields, the honed tube is called cylinder tube also.

Honed tube usually is produced by two main manufacturing process, which are honing process or skiving & roller burnishing process. The mother tube we usually use “Suitable To Hone” Cold Drawn Seamless Tubes. The process of the honed pipe is determined upon the dimension, mold available and the requirement of the customer.

Quality Standard

DIN 2391, EN 10305, SAE J524, ASTM A519, GB3639

Steel Grade:

ST45, ST52, SAE1045,27SiMn

Chemical Composition

Steel Grade	C	Si	Mn	S	P
ST45	≤0.21	≤0.35	0.35~0.65	≤0.025	≤0.025
ST52	≤0.22	≤0.55	≤1.6	≤0.025	≤0.025
SAE1045	0.42~0.50	0.17~0.37	0.50~0.80	≤0.035	≤0.035
27SiMn	0.24~0.32	1.10~1.40	1.10~1.40	≤0.035	≤0.035

Mechanical Properties

Delivery condition	BKS Cold drawn and stress-relieved
Steel Grade	T.S obN/mm²	Y.S OsN/mm²	Elongation δ5%
ST45	≥520	≥375	≥15
ST52	≥600	≥520	≥14
SAE1045	≥600	≥500	≥10
27SiMn	≥760	≥610	≥10

Honed Tube Size

Processing

Cylinder diameter /mm

Length

Straightness

Size accuracy

Wall thickness/mm

Inner boreroughness

Cold Drawn/Rolled

ID28~OD400

≤12M

0.3~1.0m m/m

H8-H11

±5%

0.8~1.6um

Honed/SRB

ID30~OD500

≤12M

0.3~1.0m m/m

±5%

0.2~0.8um

Inner hole size tolerance

ID Size	ID deviation (mm)				WT Tolerance (mm)
ID Size	H7	H8	H9	H10	WT Tolerance (mm)
≤30	+0.021/0	+0.033/0	+0.052/0	+0.084/0	±7.5% >210mm ±10%
30~≤50	+0.025/0	+0.039/0	+0.062/0	+0.1/0
50~≤80	+0.030/0	+0.046/0	+0.074/0	+0.120/0
80~≤120	+0.035/0	+0.054/0	+0.087/0	+0.140/0
120~≤180	+0.040/0	+0.063/0	+0.100/0	+0.160/0
180~≤250	+0.046/0	+0.072/0	+0.115/0	+0.185/0
250~≤315	+0.052/0	+0.081/0	+0.130/0	+0.210/0
315~≤700	+0.057/0	+0.089/0	+0.140/0	+0.230/0

Honed Tube Application Field

Honed tubes are widely used in hydraulic systems such as various oil cylinders, air cylinders, and hydraulic cylinders due to their high-precision inner wall and good mechanical properties. Honed tubes play an important role in engineering machinery, automobiles, ships, aerospace, and other fields. For example, in engineering machinery such as excavators and loaders, honed tubes are used in the manufacture of oil cylinders and are subjected to huge pressure and impact, in automobile manufacturing, honed tubes are used in key parts such as engines and brake systems to ensure the safety and stable operation of automobiles.

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