Quality Inspection for Cold Fine Rolled Draw Alloy Precision Steel Tube AISI 1020 1045 5120 5140 4130 Large and Small Diameter Mirro Finished Seamless Steel Pipe
Our crew through skilled training. Skilled skilled knowledge, strong sense of company, to meet the company wants of customers for Quality Inspection for Cold Fine Rolled Draw Alloy Precision Steel Tube AISI 1020 1045 5120 5140 4130 Large and Small Diameter Mirro Finished Seamless Steel Pipe, Our merchandise are widely used in several industrial fields. Our Business Providers Division in superior faith for your purpose of the high-quality of survival. All for customer services.
Our crew through skilled training. Skilled skilled knowledge, strong sense of company, to meet the company wants of customers for China Precision Steel Tube and Precision Steel Pipe, Taking the core concept of “to be the Responsible”. We are going to redound up on society for high quality merchandise and good service. We are going to initiative to participate in international competition to be a first- class manufacturer of this product in the world.
Brief Introduction
The phosphated steel pipe for hydraulic pressure produced according to DIN 2391 or en10305 has a black and bright color, uniform color and good rust prevention function. Phosphated steel pipes are widely used in hydraulic systems, construction machinery and construction vehicles. It is the main export product of our company.
Phosphated hydraulic Seamless Steel Tube Advantages
- Outside and inside are both phosphated
- Good surface
- Good performance in Anti Rust and corrosion
- Widely used in Hydraulic Systerm
Technical Parameters
| Grade | ST35/E235 ST37.4 ST45/E255 ST52/E355 |
| Standard | DIN2391 DIN1630 EN10305 DIN2445 JIS G3445 SAE J524 |
| Delivery Conditon | NBK(+N) BK(+C) GBK(+A) BKW(+LC) BKS(+SR) |
| Length | 6m or as Customers’request |
| Tolerance | Outer Diameter: According to Standard |
| Thickness: According to Standard | |
| Finish | Phosphated Coating |
| Oil dipped | |
| Application | Hydraulic System;Car/bus;construction vehicle |
| Delivery time | A.7 days if this goods is stock goods. |
| B.20 days if this goods will be produced after order |
Delivery Condition
| Designation | Symbol | Description |
| Cold finished (hard) | BK(+C) | Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation |
| Cold finished (Soft) | BKW (+LC) |
The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding) |
| Cold finished and stress-relieved | BKS(+SR) | Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree. |
| Annealed | GBK(+A) | The last Cold forming process is followed by annealing in a controlled atmosphere. |
| Normalized | NBK(+N) | The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere. |
Certificates: According to EN 10204 3.1
Inspection Items:
Tensile stength, Yield stength, Elongation, Flattenging, Flaring;
Chemical analysis
Eddy Current Test 100%, Size and surface checking 100%
Other test item can be arranged by A Third Party as per request
