hydraulic cylinder tubes E355 St52.mp4
5 year ago
Precision Hydraulic Cylinder Steel Tube for Crane
Standard : GB/T3639, GB/T8713, EN10305-1:2002, EN10305-2:2002,
ASTM A519-2006, ASTM A513-2007, GB/T1591-2008, GB/T17396-2009
Material: 20#, 45#, Q345B, Q345D, 25Mn, 27SiMn, E355
Product Feature:
1.High precision (can cut the costs of machining) .
2.Excellent surface finish
3.Good mechanical performance (Annealing ,Bright Annealing,QT heatment on steel tubes to reach customers' Mechanical requsts. )
| Hydraulic and pneumatic cylnder tube standard/size/tolerance | ||||||||||
|
Working method |
(mm) |
Length (m) |
Straightness (mm/m) |
Tolerance on ID |
Tolerance on WT |
(um) |
||||
| Cold Draw | 40-400 | ≤12m | 0.2-0.5 | / | ±5% | ≤1.6 | ||||
| Cold Rolled | 40-150 | ≤12m | 0.2-0.5 | / | ±5% | ≤0.8 | ||||
| Cold Draw-Honed | 40-400 | ≤8m | 0.2-0.3 | H8-H9 | ±5% | ≤0.4 | ||||
| Cold Draw-Rolling | 50-300 | ≤8m | 0.2-0.3 | H8-H9 | ±5% | ≤0.4 | ||||
| Deep hole boring-Roing | 250-400 | ≤8m | 0.2-0.3 | H8-H9 | ±8% | ≤0.8 | ||||
| Deep hole boring-Honed Roing | 250-400 | ≤8m | 0.2-0.3 | H8-H9 | ±8% | ≤0.4 | ||||
| Mechancial property | |||||||||
|
Final supply condition
Steel grade |
Cold finished(hard)(BK) | (Cold drawn and stress-relieved(BK+S) | |||||||
|
T.S bN/mm2 |
Elogation 5% | T.S bN/mm2 | Y.S Bn/mm2 | Elogation 5% | Hardness HB | Impact value(-20℃)J | |||
| 20 | ≥550 | ≥8 | ≥520 | ≥400 | ≥15 | 170 | / | ||
| 45 | ≥680 | ≥5 | ≥630 | ≥520 | ≥12 | 190 | / | ||
| Q345B | ≥660 | ≥8 | ≥620 | ≥520 | ≥15 | 190 | / | ||
| Q345D | ≥660 | ≥8 | ≥620 | ≥520 | ≥15 | 190 | ≥27 | ||
| 25Mn | ≥640 | ≥8 | ≥620 | ≥510 | ≥15 | 190 | / | ||
| 27SiMn | ≥780 | ≥5 | ≥700 | ≥580 | ≥10 | 210 | / | ||
| E355 | ≥700 | ≥8 | ≥650 | ≥580 | ≥15 | 195 | ≥27 | ||
| Chemecal composition | |||||||||
|
Steel grade |
C | Si | Mn | P | S | Cr | Ni | Cu | V |
| 20 | 0.17-0.23 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.30 | ≤0.25 | / |
| 45 | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.30 | ≤0.25 | / |
| Q345B | ≤0.20 | ≤0.50 | ≤0.17 | ≤0.035 | ≤0.035 | ≤0.30 | ≤0.50 | ≤0.30 | ≤0.15 |
| Q345D | ≤0.18 | ≤0.50 | ≤0.17 | ≤0.030 | ≤0.025 | ≤0.30 | ≤0.50 | ≤0.30 | ≤0.15 |
| 25Mn | 0.24-0.32 | 1.10-1.40 | 1.10-1.40 | ≤0.035 | ≤0.035 | ≤0.30 | ≤0.30 | ≤0.20 | / |
| 27SiMn | 0.22-0.29 | 0.17-0.37 | 0.70-1.0 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.30 | ≤0.25 | / |
| E355 | ≤0.22 | ≤0.50 | ≤1.60 | ≤0.035 | ≤0.025 | / | / | / | / |
| (Tolerance on ID) um | |||||||||
| ID Size | (Tolerance on ID)um | ||||||||
| H7 | H8 | H9 | H10 | ||||||
| 30 |
+21 0 |
+33 0 |
+52 0 |
+84 0 |
|||||
| >30-50 |
+25 0 |
+39 0 |
+62 0 |
+100 0 |
|||||
| >50-80 |
+30 0 |
+46 0 |
+74 0 |
+120 0 |
|||||
| >80-120 |
+35 0 |
+54 0 |
+87 0 |
+140 0 |
|||||
| >120-180 |
+40 0 |
+63 0 |
+100 0 |
+160 0 |
|||||
| >180-250 |
+46 0 |
+72 0 |
+115 0 |
+185 0 |
|||||
| >250-315 |
+52 0 |
+81 0 |
+140 0 |
+210 0 |
|||||
| >315-400 |
+57 0 |
+89 0 |
+170 0 |
+230 0 |
|||||
100% Eddy Current Testing.
100% Size Tolerance Checking.
100% Tube surface checking to avoid surface defects.
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Main Product:
Seamless Bearing Tubes,
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Alloy Mechanical Tubing ,
Precision Steel tubes,
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