TORICH INTERNATIONAL LIMITED
TORICH INTERNATIONAL LIMITED The Steel Tube Maker
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The Seamless Steel Tubes are produced by Cold Drawn or Cold Rolled, for small diameters below 88.9mm, the bigger diameter are produced by hot rolling.
These steel tubes will be used for mechanical engineerings, could be also used as mother tube for further cold drawn production to achieve better tolerance and surface smoothness as precision steel tubes.
Classification of steel grades and delivery condition
| Steel grade | Normal delivery conditiona | Classification in accordance with EN 10020 | ||
| Steel name | Steel number | |||
| E235 | 1.0308 | +AR | | |
| E470 | 1.0536 | +AR | ||
| E275K2 | 1.0456 | +N | ||
| Alloy quality steel | ||||
| E460K2 | 1.8891 | +N | Alloy quality steel | |
| E590K2 | 1.0644 | +QT | Non-alloy quality | |
| E730K2 | 1.8893 | +QT | Alloy quality steel | |
| C22E | 1.1151 | | | |
| C35E | 1.1181 | |||
| C45E | 1.1191 | |||
| C60E | 1.1221 | |||
| 38Mn6 | 1.1127 | |||
| 41Cr4 | 1.7035 | | | |
| 25CrMo4 | 1.7218 | |||
| 30Cr Mo4 | 1.7216 | |||
| 34Cr Mo4 | 1.7220 | |||
| 42Cr Mo4 | 1.7225 | |||
| 36CrNi Mo4 | 1.6511 | |||
| 30CrNi Mo8 | 1.6580 | |||
| 41NiCrMo7-3-2 | 1.6563 | |||
| C10E | 1.1121 | | | |
| C15E | 1.1141 | |||
| C15R | 1.1140 | |||
| 16MnCr5 | 1.7131 | |||
| 16 MnCrS 5 | 1.7139 | | ||
| 20 NiCrMo2-2 | 1.6523 | |||
| 20 NiCrMoS 2-2 | 1.6526 | |||
Chemical Composition for non-alloy quality steel, in % by mass a
| Steel grade | C | Si | Mn | P | S | Other elements | ||||
| Steel name | Steel number | min | max | min | max | min | max | max | max | |
| E235 | 1.0308 | 0.17 | - | 0.35 | - | 1.20 | 0.030 | 0.035 | ||
| E275 | 1.0225 | 0.21 | - | 0.35 | - | 1.40 | 0.030 | 0.035 | ||
| E315 | 1.0236 | 0.21 | - | 0.30 | - | 1.50 | 0.030 | 0.035 | ||
| E355 | 1.0580 | 0021 | - | 0.55 | - | 1.60 | 0.030 | 0.035 | ||
| E470 | 1.0536 | 0.16 | 0.22 | 0.10 | 0.50 | 1.30 | 1.70 | 0.030 | 0.035 | |
