St45 / E255 Hydraulic Seamless Cold Drawn Steel Tube 80 - 256MM OD 1020 Steel Tubing
Product Name: St45 / 1020 / E255 Hydraulic Cold Drawing Seamless Steel Pipe 80 - 256 MM OD Size with Stable Concentricity
Size Range: OD: 80-256mm, WT: 3-30mm, Length: 5.8m/6m, maximal 11.8m
Application: For precision purpose, auto industry, like manipulator, Shock Absorber, Transmission Shaft, Steering Gear, Car Frame, etc.
Hydraulic Cold Drawn on the seamless steel tubes, to reach high accuracy on the OD and WT tolerance
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:BKS, GBK, NBK
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 | Hydraulic Cold Drawing Seamless Precision Steel Tube |
| Material | St45 / 1020 / E255 etc |
| Delivery Condition | BK, BKW, BKS, GBK, NBK |
| Standard | DIN2391/EN10305-1/GB3639/JIS G3445 |
| Size Range | OD: 80-256mm, WT: 3-30mm |
| Application | Mechanical system |
| Round Billet | Bao Steel, Xingcheng Steel, Huai Steel, Zhongtian Steel |
| Keyword | Hydraulic Cold Drawing 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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