TORICH INTERNATIONAL LIMITED
TORICH INTERNATIONAL LIMITED The Steel Tube Maker
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Hydraulic Cylinder steel tubes and pipes EN10305-1 E355 St52 16Mn
Torich International Limited is a professional manufacturer and exporter of steel pipes materials. It is an international
marketing and sales company specialized in steel tubes, which holds the factories of Seamless Steel Tubes with
Carbon and Alloy Steel Grade, Welded Precision Steel Tubes,DOM Steel Tubes, Seamless & Welded Stainless
Steel Tubes with Nickel and Alloy Steel Grade. High precision steel tubes is our mainly products.
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 | |||||
