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Hydraulic cylinder pipe is a very important component in the hydraulic system. Its main function is to convert the pressure of hydraulic oil into mechanical energy to achieve various actions. Hydraulic cylinder tube consists of cylinder block, cylinder head, piston, piston rod, sealing components, etc.
Since there is no oxide layer on the outer wall, and there is no leakage when withstanding high pressure, it can have very good performance in terms of use.The surface roughness, ovality, surface hardness, etc. can be obtained through processing and meet the expected requirements. Moreover, if there is a residual stress layer after processing, the fatigue strength of the cylinder steel pipe can be effectively improved.Material | C% | Mn% | Si% | S% | P% |
20# | 0.17-0.23 | 0.35-0.65 | 0.17-0.37 | ≤0.035 | ≤0.035 |
ST45 | ≤0.21 | ≥0.4 | ≤0.35 | ≤0.025 | ≤0.025 |
E255 | ≤0.21 | 0.4-1.1 | ≤0.35 | ≤0.025 | ≤0.025 |
45# | 0.42-0.50 | 0.50-0.80 | 0.17-0.37 | ≤0.035 | ≤0.035 |
Q345B | ≤0.20 | ≤1.70 | ≤0.50 | ≤0.035 | ≤0.035 |
E355 | ≤0.22 | ≤1.6 | ≤0.55 | ≤0.025 | ≤0.025 |
ST52 | ≤0.22 | ≤1.6 | ≤0.55 | ≤0.04 | ≤0.04 |
25Mn | 0.22-0.29 | 0.70-1.0 | 0.17-0.37 | ≤0.035 | ≤0.035 |
27SiMn | 0.24-0.32 | 1.10-1.40 | 1.10-1.40 | ≤0.035 | ≤0.035 |
Final Supply Condition | Cold finished (Hard)(BK) | Cold drawn and stress-relieved (BK+S or + SR) | Hardness HB | |||
Parameters | T.S obN/mm² | Elongation δ5% | T.S obN/mm² | Y.S OsN/mm² | Elongation δ5% | |
20# (A106B, ST45, E255) | >=550 | >=8 | >=520 | >=375 | >=12 | 175 |
45#(CK45) | >=650 | >=5 | >=600 | >=500 | >=10 | 190 |
Q345B(ST52, E355) | >=640 | >=5 | >=600 | >=520 | >=15 | 190 |
25Mn | >=640 | >=5 | >=600 | >=510 | >=15 | 195 |
27SiMn | >=840 | >=5 | >=720 | >=600 | >=10 | 210 |
Product name | hydraulic cylinder tube /honed tube /seamless honed steel tube | |||
Standard | GB/T3639-2000 DIN2391 EN10305 ASTM A519 | |||
Metarial | C20 CK45 Q355B Q355D E355/ST52 SAE1026 4130 4140 STKM 13C | |||
Heat treatment | BK+S | |||
Size | I.D:30mm-400mm | O.D:40mm-480mm | ||
Length | Fixed length ,Random length or as requests of customers | |||
Straightness | 0.5-1/1000 | |||
ID roughness | RA 0.1-0.8micron(max) | |||
Payment term | FOB, CFR, CIF ,EXW, FCA and so on | |||
Technology | Honed & SRB(SKIVED AND ROLLER BURNISHED） | |||
Application | Honed tube for hydraulic cylinder,swivel crane,injection machine and construction machine application | |||
Conservation | anti rust oiled inside and outside surface, plastic caps in both ends | |||
Package | bundle with steel strip and knitting strip, or wooden case | |||
We are happy to answer any questions you have regarding our product lines and services. Please tell us a little more about yourself and we will have someone contact you as soon as possible.
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