TORICH INTERNATIONAL LIMITED
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Steel Grade/Steel Material:
E155 E195 E235 E275 E355
Size Range:
O.D.:6-350mm
W.T.:1-35mm
L:max12000mm
Characteristic:
Good concentricity
Good OD and ID tolerance
High precision
Stable quality
Smooth roughness
DOM Steel Tube Production Process:
Raw material → Incoming inspection → Cutting → Heating → Piercing → Hammering →Pickling → Cold-drawing → Heat treatment → Physical chemistry test → Straightening → Ends cutting → Final inspection → Bundling →Storage
| Chemical Composition& Mechanical Properties | |||||||
| Grade | C | Mn | P≤ | S≤ | Si | Cr | Mo |
| 1008 | ≤0.10 | 0.30-0.50 | 0.040 | 0.050 | - | - | - |
| 1010 | 0.08-0.13 | 0.30-0.60 | 0.040 | 0.050 | - | - | - |
| 1018 | 0.15-0.20 | 0.60-0.90 | 0.040 | 0.050 | - | - | - |
| 1020 | 0.18-0.23 | 0.30-0.60 | 0.040 | 0.050 | - | - | - |
| 1025 | 0.22-0.28 | 0.30-0.60 | 0.040 | 0.050 | - | - | - |
| 1035 | 0.32-0.38 | 0.60-0.90 | 0.040 | 0.050 | - | - | - |
| 1045 | 0.43-0.50 | 0.60-0.90 | 0.40 | 0.50 | - | - | - |
| 4130 | 0.28-0.33 | 0.40-0.60 | 0.040 | 0.040 | 0.15-0.35 | 0.8-1.10 | 0.15-0.25 |
| 4140 | 0.38-0.43 | 0.75-1.00 | 0.040 | 0.040 | 0.15-0.35 | 0.8-1.10 | 0.15-0.25 |
| GB/T | ASTM | JIS | DIN |
| 10 | 1010 | S10C | ST35,ST37,ST37.4,CK10 |
| 15 | 1015 | S15C | CK15 |
| 20 | 1020 | S20C | CK22 |
| 16Mn/Q345 | | | ST52,ST52.4,17Mn4 |
| 35 | 1035 | S35C | CK35 |
| 45 | 1045 | S45C | CK45 |
| 15Crmo | | SCM420 | 13CrMo44 |
| 20Crmo | | SCM420 | 25CrMo4 |
| 30Crmo | 4130 | SCM430 | |
| 35Crmo | 4130 | SCM435 | 34CrMo4 |
| 40Crmo | 4140 | SCM440 | 42CrMo4 |
| Mechanical Properties of ASTM A519: | ||||
| Grade | condition | MPa Tensile point | Yield point | Elongation |
| 1020 | CW | ≥414 | ≥483 | ≥5% |
| | SR | ≥345 | ≥448 | ≥10% |
| | A | ≥193 | ≥331 | ≥30% |
| | N | ≥379 | ≥379 | ≥22% |
| 1025 | CW | ≥448 | ≥517 | ≥5% |
| | SR | ≥379 | ≥483 | ≥8% |
| | A | ≥207 | ≥365 | ≥25% |
| | N | ≥248 | ≥379 | ≥22% |
| 4130 | SR | ≥586 | ≥724 | ≥10% |
| | A | ≥379 | ≥517 | ≥30% |
| | N | ≥414 | ≥621 | ≥20% |
| 4140 | SR | ≥689 | ≥855 | ≥10% |
| | A | ≥414 | ≥552 | ≥25% |
| | N | ≥621 | ≥855 | ≥20% |
