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

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

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.

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