| Customization: | Available |
|---|---|
| Certification: | RoHS, CE, ISO9001 |
| Pressure: | Medium Pressure |
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SAE4140,SCM440 Hydraulic Cylinder Barrel
As a professional hydraulic cylinder barrel manufacturer and supplier,Kingmetal has been supplying and exporting hydraulic cylinder barrel for almost 20 years.
| Type | Seamless, Hot Rolled, Cold Rolled, Cold Drawn |
|---|---|
| Standard | DIN/ASTM/EN/JIS |
| Roughness | 0.2-0.4 um |
| Grades | SAE4140/AISI4140/42CRMO4/SCM440 |
| ID Tolerance | H7,H8,H9 |
| Outside Diameter | 20 - 1500 Mm |
| Thickness | 0.5 - 6 Mm |
| Protection | Anti-rust oil on inside and outside surface, plastic caps in both ends |
Delivery Conditions
The tubes shall be manufactured from cold drawn or cold rolled processes. The tubes shall be supplied in one of the delivery conditions as follows:
| Designation | Symbol | Description |
| Cold finished (hard) | BK | Tubes do not undergo heat treatment following the final cold forming and thus, have a rather high resistance to deformation. |
| Cold finished (soft) | BKW | The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding). |
| Cold finished and stress-relieved | BKS | Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree. |
| Annealed | GBK | The last cold forming process is followed by annealing in a controlled atmosphere. |
| Normalized | NBK | The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere. |
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