Galvanized Cold-Drawn Precision Seamless Steel Tube
Galvanized Cold-Drawn Precision Seamless Steel Tube
Size range
OD: 5-420mm WT:0.5-50mm Length: cutomized
Regular sizes
6x1 6x1.5 8x1 8x1.5 10x1 10x1.0 12x1 12x1.5 12x2.0 15x1.5 15x2.0 16x2.0 18x1.5 18x2.0 20x2.0.......
Material:E215 E235 E355 ST35,ST37.4,ST45,ST52.4 etc
Galvanized Cold-Drawn Precision Seamless Steel Tube
| Standard | Material | Delivery | Surface | ||
| DIN | 2391/1630/2445 | ST37.4 ST52.4 | NBK | 1) BA 2)Black phosphating 3) Galvanizing | |
| EN | 10305-4 | E235 E355 | (+)N | ||
| BS | 3602 | CFS 360 | Zinc Layer thickness more than 8um | ||
| Other steel grades also available upon request | |||||
Delivery condition:
The tubes can be produced in the following delivery conditions:
BK (+C) Cold finished/hard (cold finished as drawn).
No heat treatment after the last cold forming process.
BKW (+LC) Cold finished/soft (lightly cold worked)
After the last heat treatment there is a light finishing pass (cold drawing).
BKS (+SR) Cold finished/stress relieve annealed.
After the final cold forming process the tubes are stress relieve annealed.
GBK (+A) Annealed.
After the final cold forming process the tubes are annealed in a controlled atmosphere.
NBK (+N) Normalized. (Mainly focus on)
After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere
Production routing:
Quality carbon steel from bao steel etc big mill, cold drawing the heat treatment without oxidization , NBK condition. Do nondestructive testing ,HT tests and do dipping oil antirust protection, Packed tube in wooden boxes.
Main feature:
High precision
Excellent brightness
No oxidization on outer and inner walls after heat treatment
High cleanness of inside wall
High pressure
No deformation after clod bending
No crack after flaring and flattening
Color : Gray with white
Tolerance
Name | Scope mm | DIN seriesmm |
| OD | 04-30 | ±0.08 |
| OD | 31-40 | ±0.15 |
| OD | 41-50 | ±0.20 |
| OD | 51-60 | ±0.25 |
| Wall | 0.5-7 | ±10% |
Surface:
NBK
Galvanization/Galvanized/Zinc Coated
Blue White Zinc (Trivalent Chromium Passivation)
Plating Colour Zinc(Trivalent Chromium Passivation)
Yellow, Army-Green
Phosphated/Black Phosphated
Surface quality
Without oxidization
No crack
No fold
No rolling fold
No scar
No laminar defect
What we can do in our testing center
Physis laboratory
Chemical spectrometer
Pressure blasting machine
Metallographic analysis
Salt Spray Test
Stock size list.
| ODmm | WT mm |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 6 | 1.5 |
| 8 | 1 |
| 8 | 1.5 |
| 10 | 1 |
| 10 | 1.5 |
| 10 | 2 |
| 10 | 2.5 |
| 12 | 1 |
| 12 | 1.5 |
| 12 | 2 |
| 12 | 2.5 |
| 12 | 3 |
| 12.7 | 1.63 |
| 14 | 1 |
| 14 | 1.5 |
| 14 | 2 |
| 14 | 2.5 |
| 14 | 3 |
| 15 | 1 |
| 15 | 1.5 |
| 15 | 2 |
| 15 | 2.5 |
| 15 | 3 |
| 15.88 | 1.63 |
| 15.88 | 2.03 |
| 16 | 1 |
| 16 | 1.5 |
| 16 | 2 |
| 16 | 2.5 |
| 16 | 3 |
| More sizes are available, pls email me for details.
|
Key words
Galvanized Precision Tubes
Precision Steel Tubes
Precision Seamless Steel Tubes
Precision Welded Steel Tubes
Precision DOM Steel Tubes
High Precision Seamless Steel Tubes/Pipe
Cold-Drawn Precision Seamless Steel Tube
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.