Quality Inspection for Hot DIP Galvanized Steel Pipe / Gi Pre Galvanized Steel Pipe/Seamless Pipe
We’ve got our personal profits workforce, design and style team, technical group, QC crew and package workforce. We have now strict good quality handle procedures for each process. Also, all of our workers are experienced in printing subject for Quality Inspection for Hot DIP Galvanized Steel Pipe / Gi Pre Galvanized Steel Pipe/Seamless Pipe, We welcome all of the purchasers and pals to contact us for mutual added benefits. Hope to do additional business enterprise along with you.
We’ve got our personal profits workforce, design and style team, technical group, QC crew and package workforce. We have now strict good quality handle procedures for each process. Also, all of our workers are experienced in printing subject for China Steel Pipe and Galvanized Pipe, If any product meed your demand, make sure you feel free to contact us. We’re sure your any inquiry or requirement will get prompt attention, high-quality items, preferential prices and cheap freight. Sincerely welcome friends all over the world to call or come to visit, to discuss cooperation for a better future!
Features
EN/DIN High Precision Galvanized Seamless Steel Tube is produced basing on DIN 2391-C and EN10305-4. It is widely used in hydraulic systems, machine tools, automobiles, ships, construction machinery and vehicles. The Hydraulic galvanized seamless steel tube with high precision has lots of advantages: No corrosion after 120 hours SALT SPRAY TEST; Good performance in Anti Corrosion & Rust; Bright pipe electric coated with Zinc; Different Color: White/ Yellow/Colorful; High Pressure /No leakage seamless steel pipe.
Specification
| Standard | DIN2391 DIN1630 EN10305 DIN2445 JIS G3445 SAE J524 |
| Grade | ST35/E235 ST37.4 ST45/E255 ST52/E355 |
| Delivery Condition | NBK(+N) BK(+C) GBK(+A) BKW(+LC) BKS(+SR) |
| Size | OD:4 to 219mm Thickness 0.5-35mm, Length: 3m,5.8,6 or according to requirements |
| Finish | Galvanized surface (Sliver/Yellow/Colorful) Zinc coating of 8-12um |
| Application | Hydraulic System; Car/bus; construction vehicle |
| Delivery time | A.3 days if this good is stock goods.B. About 30 days according to the quantity |
| HYDRAULIC PRECSION STEEL TUBE IN STOCK | ||||||||||
| OD | Thickness(mm) | |||||||||
| mm | ||||||||||
| 4 | 4*1 | |||||||||
| 6 | 6*1 | 6*1.5 | 6*2 | |||||||
| 8 | 8*1 | 8*1.5 | 8*2 | |||||||
| 10 | 10*1 | 10*1.5 | 10*2 | 10*2.5 | ||||||
| 12 | 12*1 | 12*1.5 | 12*2 | 12*2.5 | 12*3 | |||||
| 14 | 14*1 | 14*1.5 | 14*2 | 14*2.5 | 14*3 | |||||
| 15 | 15*1 | 15*1.5 | 15*2 | 15*2.5 | 15*3 | 15*3.5 | ||||
| 16 | 16*1 | 16*1.5 | 16*2 | 16*2.5 | 16*3 | 16*3.5 | 16*4 | 16*4.5 | ||
| 18 | 18*1 | 18*1.5 | 18*2 | 18*2.5 | 18*3 | 18*3.5 | 18*4 | 18*4.5 | ||
| 20 | 20*1 | 20*1.5 | 20*2 | 20*2.5 | 20*3 | 20*3.5 | 20*4 | 20*4.5 | 20*5 | |
| 22 | 22*1 | 22*1.5 | 22*2 | 22*2.5 | 22*3 | 22*3.5 | 22*4 | 22*4.5 | 22*5 | |
| 25 | 25*1 | 25*1.5 | 25*2 | 25*2.5 | 25*3 | 25*3.5 | 25*4 | 25*4.5 | 25*5 | |
| 28 | 28*1 | 28*1.5 | 28*2 | 28*2.5 | 28*3 | 28*3.5 | 28*4 | 28*4.5 | 28*5 | |
| 30 | 30*1 | 30*1.5 | 30*2 | 30*2.5 | 30*3 | 30*3.5 | 30*4 | 30*4.5 | 30*5 | 30*6 |
| 32 | 32*1.5 | 32*2 | 32*2.5 | 32*3 | 32*3.5 | 32*4 | 32*4.5 | 32*5 | 32*6 | |
| 34 | 34*1.5 | 34*2 | 34*2.5 | 34*3 | 34*3.5 | 34*4 | 34*4.5 | 34*5 | 34*6 | |
| 35 | 35*1.5 | 35*2 | 35*2.5 | 35*3 | 35*3.5 | 35*4 | 35*4.5 | 35*5 | 35*6 | |
| 38 | 38*2 | 38*2.5 | 38*3 | 38*3.5 | 38*4 | 38*4.5 | 38*5 | 38*6 | ||
| 40 | 40*2 | 40*2.5 | 40*3 | 40*3.5 | 40*4 | 40*4.5 | 40*5 | 40*6 | ||
| 42 | 42*2 | 42*2.5 | 42*3 | 42*3.5 | 42*4 | 42*4.5 | 42*5 | 42*6 | ||
| 45 | 45*2 | 45*2.5 | 45*3 | 45*3.5 | 45*4 | 45*4.5 | 45*5 | 45*6 | ||
| 46 | 46*2 | 46*2.5 | 46*3 | 46*3.5 | 46*4 | 46*4.5 | 46*5 | 46*6 | ||
| 48 | 48*2 | 48*2.5 | 48*3 | 48*3.5 | 48*4 | 48*4.5 | 48*5 | 48*6 | ||
| 50 | 50*2 | 50*2.5 | 50*3 | 50*3.5 | 50*4 | 50*4.5 | 50*5 | 50*6 | ||
| 54 | 54*2.5 | 54*3 | 54*3.5 | 54*4 | 54*4.5 | 54*5 | 54*6 | |||
| 60 | 60*2.5 | 60*3 | 60*3.5 | 60*4 | 60*4.5 | 60*5 | 60*6 | |||
| 65 | 65*3 | 65*3.5 | 65*4 | 65*4.5 | 65*5 | 65*6 | ||||
| 75 | 75*3.5 | 75*4 | 75*4.5 | 75*5 | 75*6 | |||||
| 76 | 76*4 | 76*4.5 | 76*5 | 76*6 | ||||||
| 89 | 89*6 | |||||||||
| Note： We could produce other sizes as your requirements. Surface Treatment: Bright, Galvanized, Phosphating etc. | ||||||||||
Chemical composition
|
Steel Grade |
C |
Si |
Mn |
P |
S |
Al |
|
|
Name |
No. |
max |
max |
max |
max |
max |
max |
|
E215 |
1.0212 |
0.1 |
0.05 |
0.7 |
0.025 |
0.015 |
0.025 |
|
E235 |
1.0308 |
0.17 |
0.35 |
1.2 |
0.025 |
0.015 |
— |
|
E355 |
1.058 |
0.22 |
0.55 |
1.6 |
0.025 |
0.015 |
— |
|
ST35 |
1.0308 |
0.17 |
0.35 |
0.4（min） |
0.025 |
0.025 |
— |
|
ST45 |
1.0408 |
0.21 |
0.35 |
0.4（min） |
0.025 |
0.025 |
— |
|
ST52 |
1.058 |
0.22 |
0.55 |
1.6 |
0.025 |
0.025 |
— |
Mechanical properties
| Steel Grade | Yield Strength (Mpa) | Tensile Strength (Mpa) | Elongation（%） | |
| Name | No. | ReH (min) | Rm(min) | A(min) |
| E215 | 1.0212 | 215 | 290 to 430 | 30 |
| E235 | 1.0308 | 235 | 340 to 480 | 25 |
| E355 | 1.058 | 355 | 490 to 630 | 22 |
| ST35 | 1.0308 | 235 | 340 to 480 | 25 |
| ST45 | 1.0408 | 255 | 440 to 570 | 21 |
| ST52 | 1.058 | 355 | 490 to 630 | 22 |
Tolerance
|
OD |
Allowable tolerance |
Special Tolerance |
||
|
GB/T3639 |
DIN2391 |
OD |
WT |
|
|
4mm-20mm |
±0.10mm |
±0.08mm |
±0.05mm |
±0.05mm |
|
20mm-30mm |
±0.10mm |
±0.08mm |
±0.08mm |
±0.08mm |
|
31mm-40mm |
±0.15mm |
±0.15mm |
±0.10mm |
±0.08mm |
|
41mm-60mm |
±0.20mm |
±0.20mm |
±0.15mm |
±0.15mm |
|
61mm-80mm |
±0.30mm |
±0.30mm |
±0.20mm |
±0.20mm |
|
81mm-120mm |
±0.45mm |
±0.45mm |
±0.30mm |
±0.30mm |
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 | 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) |
| (+LC) | ||
| 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. |
Quality assurance
1.Strict according to DIN2391/EN10305 or other standards.
2. Sample: Sample is free for test.
3. Tests: Salt spray test/Tensile test / Eddy current / Chemical composition test according to customers’ request
4.Certificate: IATF16949, ISO9001, SGS etc.
5.EN 10204 3.1 Certification
Application
We consistently execute our spirit of ”Innovation bringing progress, Highly-quality ensuring subsistence. Hot Dipped Zinc Coating 40*40mm En10255 Schedule 40 Cold Rolled Galvanised Steel Round Tube Pipe/Gi Galvanized Seamless Square Steel Pipe for Scaffolding, sincerity and strength ,always maintain approved superior quanlity ,welcome to our factoty for go to and instruction and small business.
China Factory Galvanized Steel Square Tube and Hollow Section Tube, Our products have mainly exported to south-east Asia Euro-America, and sales to all of our country. And depending on excellent quality, reasonable price, best service, we’ve got got good feedback from customers overseas. You are welcomed to join us for more possibilities and benefits. We welcome customers, business associations and friends from all parts of the world to contact us and seek cooperation for mutual benefits.
