EN10305-1 E235 Seamless Thick Wall Steel Tube Sizes

Instruction

EN10305-1 E235 Seamless Thick Wall Steel Tube Sizes

Size: OD 0.5-15mm, WT4.0-80 mm

Tolerance: Outer Diameter: +/- 0.05mm

Thickness: +/- 0.05mm OR as Customer Request

Length max 12000mm

Cutting Length available.

Max length 5.8 for 20ft container

Max length 11.8m for 40ft container

 

Technical Standard: 

EN10305-1, EN10305-2, EN10305-4

ASTM A519, ASTM A513

SAE J525, SAE J524,

BS6323, JIS3445

ISO8535-1 Steel Tubes for high pressure fuel pipe in compression ignition engine.

ISO0404-1992 Technical requirements for steel and steel products

ISO6892-1984 Tensile test for metal

 

Steel Grade:

St35, ST37, ST37.4, ST45, ST52

 

 

Delivery Condition 

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.

 

Production Process: 

Round Steel Billet →

Hot Piercing →

Hollow Section Tubes  →

Pickling/Lubrication →

Cold Drawing  →

Heat Treatment Annealing/Bright Annealing → (Repeat)

Cold Drawing → (Repeat)  to final dimension and tolerances

Final Heat Treatment of Annealing/Bright Annealing

 

Surface: 

1)  NBK (Bright Annealed)

2) Galvanization/Galvanized/Zinc Coated

3) Blue White Zinc (Trivalent Chromium Passivation)

4) Plating Colour Zinc(Trivalent Chromium Passivation)

5) Yellow, Army-Green

6) Phosphated/Black Phosphated

7) Smooth outer and inner surface

 

 

Applications 

1: High pressure system

2: High pressure hydraulic system

3: For Hydraulic and pneumatic cylinder

3: Heavy machinery spare part

4: For Screw Air Compressor

5: For Excavator

6: High pressure fuel pipe in compression ignition engine

7: Automobile spare parts

 

Main Features:
High precision,

Excellent brightness,

No oxidization scale,

High cleanness inner surface,

Flushing the inner diameter,

Anti-rust oil protection,

Total impurity≤1.5mg/m, maximum granule 8 degree(≤0.2mm),

Withstand high pressure,

No deformation after cold bending,

The complicated geometrical forming and machining can be realized,

Colour of tubes: Grey with white/

The tolerances can be ID ±0.05mm

Quality inner surface: Grade Q , working pressure 2000 kilos, max testing pressure 6000 kilos without deforming

180 degree bending without crack