Steel Pipe
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Descriptions of precision honed pipe
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Category：Precision Pipe
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Product description
Parameters
| Honedtubeforhydrauliccylinder | ||
| Standard | DIN2391, EN10305, JIS G3445, ASTM A519, GB/T 8713... | |
| Material | ST45, ST52, E355, E355SR, STKM13C, SAE1026, 20#, Q235B, CK45... | |
| Heattreatment | BK+S | |
| Specification | Outerdiameter(mm) | Innerdiameter(mm) |
| 50-300mm | 40-250 | |
| I.DTolerance | H8-H9 | |
| Length | 3-9m(Customersusuallychoosethe4~5.8m) | |
| Straightness | 1/1000 | |
| IDroughness | RA0.4micron(max) | |
| Technology | Honed&SRB(SKIVEDANDROLLERBURNISHED) | |
| Scope | Honed tubefor hydraulic cylinder, swivelcrane,injectionmachineand constructionmachineapplication |
|
DIN2391 Precision Tubes
| Standard | Grade | Chemical Components (%) | Mechanical Properties（NBK) | |||||||||
| C Max. |
Si Max. |
Mn | P | S | Mo | Cr | V | Tensile Strength (Mpa) |
Yield Strength (Mpa) |
Elonga-tion (%) |
||
| DIN2391 | ST35 | 0.17 | 0.35 | ≥0.40 | ≤0.025 | ≤0.025 | 0.25-0.35 | / | / | 340-470 | ≥235 | ≥25 |
| ST45 | 0.21 | 0.35 | ≥0.40 | ≤0.025 | ≤0.025 | 0.45-0.65 | / | / | 440-570 | ≥255 | ≥21 | |
| ST52 | 0.22 | 0.55 | ≤1.60 | ≤0.025 | ≤0.025 | 0.90-1.20 | / | / | 490-630 | ≥355 | ≥22 | |
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