Hydraulic Cylinder Tube E355 ST52 H8 Honed Tube

Manufacture Method:

Cold drawn, hot rolled+deep hole bored

Certification:

ISO9001, SGS,

Material:

Carbon steel,alloy steel, stainless steel

Standard&Grade:

DIN2391-2 ST52,EN10305-1 E355,C45E,25CrMo4,42CrMo4, CK45,E410, E470,ASTM A519 SAE1020,SAE1026,SAE1045,SAE1518,SAE1541, SAE4130,SAE4140,SAE4145,SAE4340,etc.

Size Range:

ID of 300mm max for cold drawing,

ID of 500mm for deep hole boring

ID Tolerance:

ISO H8

End finish:

Plain ends with square cuts,free of burrs

Bore Roughness:

Ra0.30um max for honed tubes, Ra0.25um Max for Skived&roller burnished tubes

End finish:
Plain ends with square cuts,free of burrs

Usage:
Hydraulic cylinder, Pneumatic Cylinder

Product Feature:
1.High precision (can cut the costs of machining) .
2.Excellent surface finish
3.Good mechanical performance (Aneal ,Bright Anealing,QT heatment on steel tubes to reach customers' Mechanical requsts. )

1.+C /BK

No heat treatment after final cold drawing process.

2.+LC/BKW

After the final heat treatment there's a suitable drawing pass.

3.+SA/BKS

After the final cold drawing process there's a stress relief heat treatment in controlled atmosphere.

4.+A/GBK

After the cold drawing process the tubes are annealed in a controlled atmosphere.

5.+N/NBK

After the final cold drawing operation the tubes are normalized in a controlled atmosphere.

Product Pictures

Company Introduction

QUALITY CONTROL

1. Incoming Raw Material Inspection

2. Raw Material Segregation to avoid steel grade mix-up
3. Heating and Hammering End for Cold Drawing
4. Cold Drawing and Cold Rolling, on line inspection
5. Heat Treatment, +A, +SRA, +LC, +N, Q+T
6. Straightening-Cutting to specified length-Finished Measuring Inspection
7. Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8. Packing and Stocking

100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects