NEW-ERA STEEL TUBE TECHNOLOGY CO.,LTD
NEW-ERA STEEL TUBE HOLDING NINGBO PIPEWAY TRADE CO.,LTD
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Hydraulic Cylinder steel tubes and pipes EN10305-1 E355 St52 16Mn
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
| 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 | |||||
