Black Phosphating Cold Rolled Steel Tube Bending For Manipulator / Steering Gear
Product Name: High Precision Seamless Cold Rolled Steel Tube with Black Phosphating
Material: E235, E255, E355
Size Range: OD: 6-88mm, WT: 1-15mm, Length: 5.8m/6m, maximal 11.8m
Delivery Condition: +C, +LC, +SR, +A, +N
Application: For high precision purpose, auto industry, like manipulator, Shock Absorber, Transmission Shaft, Steering Gear, Car Frame, etc.
Stable Quality with Comeptitive Price.
Good Extending and Bending Ability.
Black Phosphating surface treatment.
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:+SR, +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 | High Precision Seamless Cold Rolled Steel Tube with Black Phosphating |
| Material | E235, E255, E355 |
| Delivery Condition | +C, +LC, +SR, +A, +N |
| Surface | Black Phosphating |
| Size Range | OD: 6-88mm, WT: 1-15mm |
| Application | High precision purpose, auto parts, oil cylinder, etc |
| Round Billet | Bao Steel, Xingcheng Steel, Zhongtian Steel |
| Keyword | Black Phosphating Steel Tube |
| Certificate | TS16949, ISO 9001 |
| HS code | 7304319000 |
| Delivery Time | 45 days |
| Pakcing | Bundles or Woodern Boxes |
| Steel Grade | Chemical Composition | |||||
| Symbol | Material Number |
C Max. |
Si Max. |
Mn Max. |
P Max. |
S Max. |
| E235 | 1.0308 | 0.17 | 0.35 | 1.20 | 0.025 | 0.025 |
| E255 | 1.0408 | 0.21 | 0.35 | 0.40--1.10 | 0.025 | 0.025 |
| E355 | 1.0580 | 0.22 | 0.55 | 1.60 | 0.025 | 0.025 |
| Steel Grade | +C | +LC | +SR | |||||
| Name | No. |
Rm Mpa |
A % |
Rm Mpa |
A % |
Rm Mpa |
ReH Mpa |
A % |
| E235 | 1.0308 | 480 | 6 | 420 | 10 | 420 | 350 | 16 |
| E255 | 1.0408 | 580 | 5 | 520 | 8 | 520 | 375 | 12 |
| E355 | 1.0580 | 640 | 4 | 580 | 7 | 580 | 450 | 10 |
| Steel Grade | +A | +N | ||||
| Name | No. |
Rm Mpa |
A % |
Rm Mpa |
ReH Mpa |
A % |
| E235 | 1.0308 | 315 | 25 | 340--480 | 235 | 25 |
| E255 | 1.0408 | 390 | 21 | 440--570 | 255 | 21 |
| E355 | 1.0580 | 450 | 22 | 490--630 | 355 | 22 |
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