Annealing Structural Din 1629 Seamless Carbon Steel Pipe
Annealing Structural Pipe Carbon Steel Pipe
Material: ST35, ST45, ST52, 1010, 1020, 1045, Q345B
Size Range: OD: 6-256mm, WT: 1-30mm, Length: 5.8m/6m, maximal 11.8m
Cold Drawn/ Cold Rolled on the seamless steel tubes, to reach high accuracy on the OD and WT tolerance
Heat Treatment, Annealing, Normalizing.
Quality Control:
1. Incoming Raw Material Inspection
2. Raw Material Segregation to avoid steel grade mix-up
3. Heating and Hammering End for Cold Drawing
4. Cold Drawing or Cold Rolling, On line inspection
5. Heat Treatment:Annealing, Normalizing, +A, +N
6. Straightening/Cutting to specified length/Finished Measuring Inspection
7. Quality Testing in own lab with Tensile Strength, Yield Strength, Elongation, Hardness, Straightness, etc.
8. Packing and Stocking.
100% Eddy Current Testing.
100% Size Tolerance Checking.
100% Tube surface checking to avoid surface defects.
| Product Name | Annealing Structural Pipe |
| Material | ST35, St45, ST52 |
| Delivery Condition | BK, BKW, BKS, GBK, NBK |
| Standard | DIN2391/DIN1629/DIN1630 |
| Size Range | OD: 6-256mm, WT: 1-30mm |
| Application | structural pipes |
| Round Billet | Bao Steel, Xingcheng Steel, Huai Steel, Zhongtian Steel |
| Keyword | Seamless Steel Pipe |
| Certificate | TS16949, ISO 9001 |
| HS code | 7304319000 |
| Delivery Time | 45 days |
| Packing | Bundles or Wooden Boxes |
| Steel Grade | Chemical Composition | |||||
| Symbol | Material Number |
C |
Si |
Mn |
P |
S |
| ST35 | 1.0308 | 0.17 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| ST45 | 1.0408 | 0.21 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| ST52 | 1.0580 | 0.22 | 0.55 | ≤1.60 | 0.025 | 0.025 |
| Steel Grade | BK | BKW | BKS | |||||
| Name | No. |
Rm |
A |
Rm |
A |
Rm |
ReH |
A |
| ST35 | 1.0308 | 480 | 6 | 420 | 10 | 420 | 315 | 14 |
| ST45 | 1.0408 | 580 | 5 | 520 | 8 | 520 | 375 | 12 |
| ST52 | 1.0580 | 640 | 4 | 580 | 7 | 580 | 450 | 10 |
| Steel Grade | GBK | NBK | ||||
| Name | No. |
Rm |
A |
Rm |
ReH |
A |
| ST35 | 1.0308 | 315 | 25 | 340--470 | 235 | 25 |
| ST45 | 1.0408 | 390 | 21 | 440--570 | 255 | 21 |
| ST52 | 1.0580 | 450 | 22 | 490--630 | 355 | 22 |
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