Q235 SPHC ERW Automotive Welded Steel Tube With Galvanized Coated Surface
Product Details
welded steel pipe
,welding steel tubing
Q235 SPHC ERW steel pipe Cutting Chamfer Automotive Welded Steel Tube
Application:Dashboard, Seat, Anti-collision Beam, Cylinder Shock Absorber, Door (Thermoform Tube)
size:L--2~12m OD--10~76mm WT--0.5~4mmmm
Manufacture method:The steel pipe shall be made of hot rolled steel strip or cold rolled steel strip by high frequency resistance welding method
Delivery State:Steel tube should be welding or heat treatment state delivery
Grade:Q235 Q345 SPCC SPHC HC340/590DP B340/590DP HC340LA HC380LA HC420LA HC410LA HC500LA S355MC S500MC S550MC S600MC S700MC SAPH440 QSTE340TM QSTE380TM QSTM420TM QSTE500TM ST37-2G ST52-2G CR340LA CR380LA CR420LA DC01 DC02 DC03 DC04 DC05 STKM11A STKM12A STKM12B STKM12C STKM13A STKM13B STKM14A STKM14B STKM14C
Surface Quality:The internal and external surfaces of the steel tube are not allowed to have cracks, scabs, folds, delaminations, laps, and burns. Allows for scribes, scratches, misalignment of welds, burns, oxide scales, and external burr removal traces that are not more than a negative wall thickness deviation
Advantages: Good mold material, high quality of coolant and other production materials
Unit equipment
| Y32Z/60 | Each one |
| Automatic pipe cutting machine | 2 |
| Semi-automatic pipe cutting machine | 5 |
| Automatic chamfering machine | 5 |
| Length processing accuracy | Automatic--±0.3mm Semi-automatic--±0.5mm |
| Equipment length automatic measurement equipment | 100% online length measurement |
| Equipment online laser coding equipment | 120 degree batch tracking |
| Length processing accuracy | ±0.3mm |
Accuracy
| OD(mm) | Accuracy |
| 10-25 | ±0.05 |
| ＞25 | ±0.1(if finishing,it can reach to ±0.1) |
Test items and sampling for steel tubes
| Number | Test items | Test frequency | Sampling quantity |
| 1 | Smelting analysis | 1/furnace | 1 |
| 2 | Finished product analysis | 1/furnace | 1 |
| 3 | Tensile test | 1/batch | 1 |
| 4 | Weld tensile test | 1/batch | 1 |
| 5 | Impact test | 1/batch | 2 groups in a time, 3 samples in a group |
| 6 | Flattening test | 1/batch | 1 sample on 2 pipes in each batch |
| 7 | Bending test | 1/batch | 1 sample on 2 pipes in each batch |
| 8 | Flaring test | 1/batch | 1 sample on 2 pipes in each batch |
| 9 | Hydraulic test | All | All |
| 10 | Ultrasonic testing | All | All |
| 11 | Eddy current testing | All | All |
| 12 | Galvanized layer uniformity test | 1/batch | 1/batch |
| 13 | Galvanized weight determination | 1/batch | 1/batch |
| 14 | Galvanized layer adhesion test | 1/batch | 1/batch |
Mechnical Properties
| Steel Grade | Lower yield strength Re1./MPa | Tensile strength Rm/MPa | Elongation A/％ | |
| D≤168.3mm
| D＞168.3mm | |||
| ≥ | ||||
| 08,10 | 195 | 315 | 22 | |
| 15 | 215 | 355 | 20 | |
| 20 | 235 | 390 | 19 | |
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